MODELLING OF DRAPING AND DEFORMATION FOR TEXTILE COMPOSITES
|
|
- Brandon Townsend
- 5 years ago
- Views:
Transcription
1 MODELLING OF DRAPING AND DEFORMATION FOR TEXTILE COMPOSITES A. C. Long, M. J. Clifford, P. Harrison, C. D. Rudd School of Mechanical, Materials, Manufacturing Engineering and Management University of Nottingham, University Park, Nottingham NG7 2RD, UK ABSTRACT Forming of textile composite materials to three dimensional geometries involves a number of deformation mechanisms within the textile structure. Of these intra-ply (in-plane) shear is generally accepted as the dominant mechanism. In this paper results from picture frame shear experiments are described to characterise a number of materials including woven and non-crimp dry fabrics, thermoset prepregs and thermoplastic composites. The latter materials were characterised as a function of rate to illustrate the effects of matrix rheology. Results from these tests were used within an iterative draping algorithm in which fabric shear energy is minimised. A number of forming experiments were conducted to validate the model, illustrating that it was able to determine the effect of textile structure on the formed fibre pattern. INTRODUCTION Textile composites, consisting of a textile reinforcement within a thermoplastic or thermoset polymer matrix, can be processed via a number of techniques. Components can be produced directly by forming of thermoset or thermoplastic prepregs. Alternatively liquid composite moulding (LCM) processes such as resin transfer moulding can be used, in which a dry reinforcement is impregnated with a thermosetting resin, which then cures to form a rigid composite. In these processes the reinforcement is usually formed to the component shape in a separate operation to produce a textile preform. Whatever the material and process of choice, a forming operation is required to convert the twodimensional layers or plies into the required three-dimensional geometry. For fabrics based on orthogonal yarns (or tows), a number of deformation mechanisms may occur during this operation (as described for example by Potter (1). Within individual layers intra-ply (in-plane) shear, corresponding to rotation of tows about their crossovers, is considered to be the dominant deformation mechanism as very high strains can be achieved in the bias direction (ie. 45 o to the fibres) at relatively low applied force. Inter-tow slip can also occur, and may be significant when forming to tight radii where the intra-ply shear angle varies significantly (2). For multi-layer components, inter-ply slip is required to accommodate curved surfaces. Tensile forces along the fibres may lead to fibre straightening for woven fabrics, whilst compressive forces can cause buckling leading to wrinkling of the fabric. Experimental measurements suggest that wrinkling occurs at a limiting degree of intra-ply shear known as the locking angle, typically ranging from 2 o to 65 o (2-4). A number of researchers have developed simulations of draping or forming for textile composites. Several of these models have been implemented within commercial software packages. Two approaches have been adopted, based on either a geometric (kinematic) mapping, or a mechanical representation solved using an explicit finite element method. Geometric/kinematic models (5-7) represent the fabric structure as a pin-jointed net, which is mapped on to the surface of the component/forming tool by assuming that tow segments are able to shear at the joints (tow crossovers). A unique draped pattern can be obtained by specifying two intersecting tow paths, referred to as generators, on the surface of the forming tool. The remaining tows are positioned using a geometric mapping. Correct specification of the generators is critical, as these will determine the positions of all remaining fibres. The kinematic approach provides a very fast solution, with run times
2 typically less than 1 seconds. However this approach is unable to differentiate between materials other than in the specification of the locking angle, which is used to indicate possible areas of wrinkling. Consequently an identical fibre pattern is obtained, regardless of variations in material forming characteristics or processing technique. The mechanical approach involves simulation of the entire forming process over a number of time steps. At each stage equilibrium equations are solved, usually using an explicit finite element technique. This approach has been applied to both dry fabrics (8,9) and thermoplastic or thermoset prepregs (1,11). Provided that accurate processing property data are specified, it is possible to represent material specific behaviour. In addition, ply/tool and ply/ply friction can be modelled. Ply wrinkling is anticipated by the occurrence of in-plane compressive forces, rather than the specification of a locking angle. However this approach is time consuming, both in terms of CPU time and in the collection of the large set of materials data required. In this paper the deformation characteristics of dry fabrics, thermoset prepregs and thermoplastic composites will be established. The results will be used within an iterative model for forming/draping of textile composites, which minimises fabric shear energy to account for resistance to intra-ply shear. This will be shown to provide more accurate results than obtained using the kinematic modelling approach, whilst associated CPU times are significantly lower than those required for non-linear finite element analysis. Results from a number of forming experiments will be presented to validate the iterative model. INTRA-PLY SHEAR Experimental Procedure In previous studies, resistance to intra-ply shear has been characterised using two approaches. Uniaxial extension of relatively wide samples in the bias direction is favoured by a number of researchers (1,2), as the testing procedure is relatively simple. However the deformation field within the sample is non-uniform, with maximum shear observed in the central region and a combination of shear and inter-tow slip observed adjacent to the clamped edges. In addition the shear angle cannot be obtained directly from the crosshead displacement, so that the test must be monitored visually to measure deformation. An alternative is the picture-frame shear test (3,4,12), in which the fabric is clamped within a frame hinged at each corner, with the two diagonally opposite corners displaced using a mechanical testing machine. Although this test may be sensitive to small variations in material alignment, it is used in this study as it produces uniform shear deformation (if performed with care). This has been confirmed experimentally by Sharma et al (13) using Surface Displacement Analysis (SDA). The authors showed that uniform shear was induced during a picture frame shear experiment, whilst significant non-uniformity was observed during a bias extension test. The picture-frame shearing equipment used is illustrated in Fig. 1. The apparatus was operated using a Hounsfield mechanical testing machine, which monitored both load and displacement during the experiment. The results were converted into shear force versus shear angle using simple geometric relationships based on crosshead displacement and original rig dimensions. A pre-tension rig was used to position dry fabrics within the picture-frame (14). This served two purposes, to align the material within the rig and to enhance repeatability. Dry fabrics and thermoset prepregs were tested at room temperature, whilst thermoplastics were tested at elevated temperatures within an environmental chamber.
3 Crosshead mounting Φ Clamping plate l Bearings Figure 1. Schematic of the picture-frame shear rig. The distance between the bearings (l) was 145 mm, whilst the clamping length was 115 mm. Dry Fabrics Typical shear compliance curves for woven glass fabrics are shown in Fig. 2. This figure compares the behaviour of fabrics with similar surface densities but different fibre architectures. Each test was carried out at 1mm/min (although no significant rate effects were observed for dry fabrics). The plain weave (P8) required the highest force to achieve a particular shear angle, whilst the twill weave (T8) was the most compliant. This is related to the fact that the ratio between tow width and pitch is greatest for this material. However for all fabrics tested two distinct regions may be identified. The initial resistance to shear is relatively low, and is likely to be caused by friction at the tow crossovers. Once adjacent tows come into contact, the resistance increases significantly as the tows are compressed together. This is the region where wrinkling is usually observed. Locking angles of between 55 o and 68 o were observed for a range of dry fabrics. 6 Shear Force (N) P8 S8-2 T8 P8 Predicted S8-2 Predicted T8 Predicted Shear Angle (Deg) Figure 2. Experimental and predicted shear compliance curves for woven glass fabrics with different architectures: Plain weave (P8), 4-harness satin weave (S8-2), and 2:2 Twill weave (T8). Curves represent mean shear force from a minimum of 6 tests, with error bars showing 9% confidence limit.
4 Also included in Fig. 2 are predictions obtained using a mechanical model (described in detail elsewhere (14)). This is based on a generalised geometric model for textile reinforcements, which describes yarn paths for both woven and non-crimp fabrics. Deformation of the fibre architecture during in-plane shear is also represented, allowing tow cross-sections to be modified when lateral contact occurs. Tow contact areas are calculated, over which Coulomb friction is assumed to determine the local torque contribution. Contact force is calculated by integrating the tow pressure over the contact area, with a semi-empirical model used to relate pressure to tow volume fraction and fibre modulus. The total torque over the specimen is used to calculate the intra-ply shear force. Comparison of predictions with experimental results illustrates that the model is capable of representing the effects of fibre architecture on compliance. (a) 6 5 Ebx936 Parallel Ebx936 Perpendicular Shear Force (N) (b) Shear Angle (Deg) 2 Ebx318 Parallel 16 Ebx318 Perpendicular Shear Force (N) Shear Angle (Deg) Figure 3. Shear compliance curves for ±45 o non-crimp glass fabrics tested parallel and perpendicular to the stitch. (a) Tricot 1&1 warp-knit (Ebx936). (b) Pillar warp-knit (Ebx318). Curves represent mean shear force from a minimum of 6 tests, with error bars showing 9% confidence limit. Fig. 3 shows typical shear compliance curves obtained for non-crimp fabrics with both a tricot and pillar warp-knitted threads. The tricot warp-knit results in a zig-zag stitching thread pattern, whereas the pillar warp-knit is similar to a chain stitch. In both cases it is apparent that the compliance is lower when the fabric is sheared parallel to the stitching direction. Testing in this direction results in a tensile strain within the stitch, which causes an increase in shear force. The effect is more pronounced for the pillar warp-knit, where testing parallel to the stitch results in a linear increase in force until the stitching thread snaps. After this point the force is reduced until inter-tow compaction occurs. The directionality exhibited by non-crimp fabrics during shear can result in non-symmetric fibre patterns during draping, as described later.
5 Thermoplastic/Thermoset Prepregs Fig. 4 compares shear compliance curves for a 5 harness satin weave carbon/epoxy thermoset prepreg at three shear rates. For these experiments, the crosshead displacement rate was varied during each test to maintain a constant angular shear rate. It is clear that a significant increase in shear force occurs during the start of the test. This is in contrast to the behaviour of dry fabrics, which initially exhibit very little resistance to shearing. However after the first 2 o of shear, a steady increase in shear force is observed. The increase is more pronounced above a shear angle of 5 o as the fibres become tightly packed. Wrinkling was observed at shear angles of around 6 o for all rates. Also included is this figure is the shear compliance curve for the dry fabric used to produce this prepreg. It is clear that the major contribution to shear force is from the viscous matrix. 5 4 Prepreg: fast shear rate Prepreg: medium shear rate Prepreg: slow shear rate Dry Fabric Shear Angle (Deg) Figure 4. Shear compliance curves for a 5 harness satin weave carbon/epoxy prepreg. Angular shear rates of.93, 4.65 and 9.31 deg/s denoted slow, medium and fast respectively Twintex: fast shear rate Twintex: medium shear rate Twintex: slow shear rate Shear Angle (Deg) Figure 5. Shear compliance curves for 2:2 twill weave glass/pp thermoplastic composite at 18 o C. Angular shear rates of.93, 4.65 and 9.31 deg/s denoted slow, medium and fast respectively. Fig. 5 compares shear compliance curves for a glass/polypropylene thermoplastic composite, based on a 2:2 twill weave reinforcement with a fibre volume fraction of 35%. In this case the viscosity of the molten polymer is significantly lower than that of the partially cured epoxy used in Fig. 4, and hence the forces are much lower. Furthermore this material exhibits a relatively constant shear force for the first 4 o of shear. The experimental results were obtained at 18 o C, although further results have also
6 been obtained at a range of temperatures (15). An increase in temperature from 19 o C to 22 o C led typically to a reduction in shear force of 7% to achieve a given shear angle. Relative motion of reinforcement fibres within prepregs is resisted by a film of matrix, both between individual filaments and between reinforcement tows. Two contributions can be identified, shearing at the crossover point of two perpendicular tows, and relative movement of parallel fibres or tows. An increase in shear force for any given angle was observed with an increase in shear rate, although increasing the rate by a factor of 1 led to only a 3-fold increase in shear force. This would suggest that the matrix undergoes significant shear thinning during testing. Whilst this may seem surprising at the relatively low testing rates involved, the shear strain rates between individual fibres and tows may be high due to the reduction in fibre spacing as the material attains high shear angles. A similar effect was observed for the thermoset prepreg (Fig. 4). These results illustrate the difficulty in modelling forming for prepregs, where the matrix rheology dictates that deformation behaviour will vary with both rate and processing temperature. FORMING SIMULATION Generally the geometric/kinematic approach to drape simulation works well for symmetric shapes draped with balanced materials. However for non-symmetric geometries placement of the two generator fibre paths may be problematic, as it may not be possible to identify two stationary fibre axes. For materials such as non-crimp fabrics, which exhibit a preferential direction for deformation, the fibre pattern may be different to that obtained using a balanced fabric. The use of a mechanical forming simulation may allow consideration of material directionality, although this would be achieved at the expense of increased computation time. The approach presented here is based on the use of a geometric mapping algorithm within an iterative scheme. The energy required to produce each mapping is calculated, with the mapping resulting in the lowest energy assumed to represent the actual behaviour of the fabric. The deformation energy is the sum of several components related to the mechanisms identified in the introduction. At present the model considers only intra-ply shear, as this is thought to be most indicative of the effect of fabric construction on deformation. The fabric shear energy (work done during shearing, U s ) can be calculated simply from the area under the torque-shear angle curve: θ U ( θ ) = T ( γ ) dγ [1] s where T(γ) is the torque required to reach a shear angle γ. This expression can be evaluated either from the intra-ply shear model described above or by fitting an empirical relationship to the measured shear compliance curve. For non-crimp fabrics, two curves may be specified to represent shearing parallel and perpendicular to the stitching thread. The total energy is calculated within the fabric drape simulation by summing the contribution at each node (tow crossover). A simple way to determine the mapping resulting with the minimum energy is to use an iterative scheme based on the two generator fibre paths. This approach involves finding the two intersecting paths that result in the lowest total energy. A Hooke and Jeeves minimisation method is used, where the generator path is defined one step at a time from a user-defined starting point. Each successive set of nodes is optimised by iterating the generator path angle to achieve the minimum increase in shear energy. For reasons of computational efficiency, this technique is preferred to a global minimisation algorithm in which the entire generator path is modified at each stage of the process. However as nodes in contact with the tool are subject to additional constraints due to friction, the present approach is likely to be reasonably accurate for automated forming operations. The results of this minimisation algorithm are shown in Fig. 6, which shows predicted fibre patterns for a hemisphere using shear data for a 4 harness satin weave and a ±45 pillar warp-knit (Ebx318,
7 Fig. 3b). The predictions show a good correlation with the experimental results (Fig. 7). These results are particularly encouraging, as a conventional geometric draping simulation would predict identical fibre patterns for these materials. Figure 6. Results from drape simulation over a hemispherical tool using the shear data for S8-2 (left) and Ebx318 (right). Figure 7. Hemispherical preforms produced using two glass fabrics. Left - 4 harness satin weave (S8-2). Right - ±45 pillar warp-knit (Ebx318). An automotive transmission tunnel was used to evaluate the iterative draping simulation for a component with no axial symmetry. Preforms were produced by hand lay-up over a male former. An arrangement of several discrete forming pads was developed to hold the fabric onto the component surface during lay-up. These assisted in the lay-up process and resulted in improved repeatability during preform manufacture. Fig. 8 compares predicted fibre patterns for this geometry obtained using a variety of techniques. Fig. 8(a) was obtained using the purely kinematic algorithm, where generator paths were defined as geodesics. Fig. 8(b) was generated using the energy minimisation algorithm with shear data for a plain weave material (P8). It is clear that the energy minimisation algorithm has reduced the shear deformation over the surface significantly compared to the kinematic model; if the shear energies for each simulation are analysed a reduction of 35% is recorded. Fig. 8(c) was based on shear data for a ±45 non-crimp carbon fabric, having similar shear compliance data to that for Ebx936 (Fig. 3a). In this case fabric deformation was increased in fabric quadrants that were sheared in the preferential direction.
8 (a) (b) (c) Figure 8. Deformed fibre pattern for a prototype automotive component using the energy minimisation algorithm. (a) Geodesic generator paths. (b) Shear data for a plain weave. (c) Shear data for a ± 45 tricot stitched fabric. Fig. 9 compares predicted and measured shear angles along the length of the component for the latter material. Fabric layers were marked with an orthogonal grid, and shear angles were determined by measuring the relative position of grid points using digital vernier callipers. The results agree over the majority of the length, although the model over-estimates the shear deformation at the rear of the tunnel. For experimentally produced preforms, wrinkles were present in this location. Darts (triangular cuts) were used to alleviate wrinkling, reducing the overall shear deformation in the region. These discontinuities were not represented in the drape analysis.
9 6 Shear angle ( ) Predicted Measured Distance (mm) Figure 9. Comparison of predicted and measured shear angles along the length of the transmission tunnel, measured on the centre line from left to right with reference to Fig. 8(c). DISCUSSION This paper has analysed the deformation mechanisms exhibited during forming of textile composites. It is generally accepted that the most important mechanism is intra-ply (in-plane) shear. This can be characterised using a picture-frame shear test, which allows fabric/ply locking angles (maximum shear angle) to be observed, and material compliance to be measured in terms of shear force versus shear angle. For dry fabrics typically two regions are observed in this curve, corresponding to intertow shear, resulting in very low forces, followed by lateral tow compaction, resulting in a sharp increase in force as the locking angle is approached. A similar relationship is exhibited by thermoplastic and thermoset prepregs, although here the force is dominated by a polymer film between fibres. Generally the behaviour of dry fabrics was found to be independent of forming rate, whereas prepregs exhibited rate dependency due to the viscosity of the polymer film. Furthermore significant shear thinning was observed for both the thermoplastic and thermoset composites tested. This may make modelling problematic for these materials, as the shear rate will vary spatially over a complex component. For thermoplastic materials, which are usually processed by non-isothermal compression moulding, the temperature dependency of shear compliance may necessitate the use of a sequential forming simulation with a coupled heat transfer model. The above measurements were performed principally to provide materials data for draping/forming simulations. A novel draping simulation has been developed, in which the traditional geometric mapping is used within an iterative scheme. This is used to minimise fabric shear energy, which can be obtained experimentally or using intra-ply shear models. This approach provides more accurate results than commercially available draping simulations, particularly for non-symmetric components or materials with a preferential direction of shear (such as non-crimp fabrics). More accurate still is the use of an explicit, non-linear finite element analysis code. The author would suggest that a geometric/iterative draping simulation should be used for initial component design and materials selection, followed by a full mechanical analysis to optimise the manufacturing process. ACKNOWLEDGEMENTS The authors would like to acknowledge the work of a number of research assistants and students, in particular Francois Robitaille, Ben Souter, Craig Wilks and Jakapan Thaworn. The following organisations are also thanked for their continued support: The Engineering & Physical Sciences Research Council, Ford Motor Company, ESI Group, BAE Systems, BP Amoco, Brookhouse
10 Patterns, DERA, Dowty Aerospace Propellers, Flemings Industrial Fabrics, Hexcel Composites, MSC Software, Rolls Royce, Vetrotex International, University of Cambridge, University of Leeds. REFERENCES 1. Potter K.D. The influence of accurate stretch data for reinforcements on the production of complex structural mouldings, Composites, July 1979, pp Wang J., Page J.R., Paton R. Experimental investigation of the draping properties of reinforcement fabrics, Composites Science & Technology, v 58, 1998, pp Breuer U., Neitzel M., Ketzer V., Reinicke R. Deep drawing of fabric-reinforced thermoplastics: Wrinkle formation and their reduction, Polymer Composites, v 17, 1996, pp Prodromou A.G., Chen J. On the relationship between shear angle and wrinkling of textile composite preforms, Composites Part A, v 28, 1997, Van West B.P., Pipes R.B., Keefe M. A simulation of the draping of bidirectional fabrics over arbitrary surfaces, J Text Inst, v 81, 199, Bergsma O.K. Computer simulation of 3D forming processes of fabric reinforced plastics, Proc 9 th Int Conf on Composite Materials, Madrid, July 1993, IV: Long A.C., Rudd C.D. A simulation of reinforcement manufacture during the production of preforms for liquid moulding processes, IMechE J Engineering Manufacture, v 28, 1994, pp Boisse P., Borr M., Buet K., Cherouat A. Finite element simulations of textile composite forming including the biaxial fabric behaviour, Composites Part B, v 28, 1997, pp Dong L., Lekakou C., Bader M.G. Solid-mechanics finite element simulations of the draping of fabrics: a sensitivity analysis, Composites Part A, v 31, 2, pp O Brádaigh C.M., Pipes R.B. Finite element analysis of composite sheet-forming process, Composites Manufacturing, v 2, 1991, pp de Luca P., Lefébure P., Pickett A.K. Numerical and experimental investigation of some press forming parameters of two fibre reinforced thermoplastics: APC2-AS4 and PEI-CETEX, Composites Part A, v 29, 1998, Canavan R.A., McGuinness G.B., O Braidaigh C.M. Experimental intraply shear testing of glass-fabric reinforced thermoplastic melts, Proc 4 th Int Conf on Automated Composites, Nottingham, Sept 1995, pp Sharma S.B., Sutcliffe M.P.F., Clifford M.J., Long A.C. "Experimental investigation of tow deformation during draping of woven fabrics", Proc 4 th Int European Scientific Association for Material Forming Conf, Liège, Belgium, April 21, pp Souter B.J. Effects of fibre architecture on formability of textile preforms, PhD Thesis, University of Nottingham, Wilks C.E., Rudd C.D., Long A.C., Johnson, C.F. Rate dependency during processing of glass/thermoplastic composites, Proc 12 th Int Conf on Composite Materials, Paris, July 1999.
Normalisation Of Shear Test Data For Rate- Independent Compressible Fabrics
Normalisation Of Shear Test Data For Rate- Independent Compressible Fabrics Philip Harrison* 1, Jo Wiggers 2, Andrew C. Long 2 1 University of Glasgow - Room 09 James Watt (South) Building, Materials Engineering
More informationDRAPING SIMULATION. Recent achievements and future trends. Dr. Sylvain Bel LGCIE University Lyon 1
DRAPING SIMULATION Recent achievements and future trends 1 Dr. Sylvain Bel LGCIE University Lyon 1 2 DRAPING SIMULATION Why? How? What? DRAPING SIMULATION WHY? Clamps Punch Fabric Die 1 2 Resin 3 4 Fig.
More informationA simplified finite element model for draping of woven material
Composites: Part A 35 (2004) 637 643 www.elsevier.com/locate/compositesa A simplified finite element model for draping of woven material S.B. Sharma, M.P.F. Sutcliffe* Department of Engineering, Cambridge
More informationINVESTIGATION OF THE PROCESSING PARAMETERS OF A 3D WOVEN REINFORCEMENT
INVESTIGATION OF THE PROCESSING PARAMETERS OF A 3D WOVEN REINFORCEMENT Andreas Endruweit, Dhiren K. Modi and Andrew C. Long School of Mechanical, Materials and Manufacturing Engineering, University of
More informationSHEAR TENSION COUPLING IN BIAXIAL BIAS EXTENSION TESTS
SHER TENSION COUPLING IN IXIL IS EXTENSION TESTS P. Harrison *, P. Potluri Department of Mechanical Engineering, James Watt uilding (South), University of Glasgow, Glasgow G 8QQ, U.K. p.harrison@mech.gla.ac.uk
More informationMeasurement of the Transverse and Longitudinal Viscosities of Continuous Fibre Reinforced Composites
Measurement of the ransverse and Longitudinal Viscosities of Continuous Fibre Reinforced Composites P. Harrison,. Haylock and A.C. Long University of Nottingham - School of Mechanical, Materials & Manufacturing
More informationSome Proposed Experimental Tests for use in Finite Element Simulation of Composite Forming
Some Proposed Experimental Tests for use in Finite Element Simulation of Composite Forming B.K. Cartwright 1, P. de Luca 2, J. Wang 3, K. Stellbrink 4, R. Paton 1 1 Cooperative Research Centre for Advanced
More informationWiggers, Joram (2007) Analysis of textile deformation during preforming for liquid composite moulding. PhD thesis, University of Nottingham.
Wiggers, Joram (2007) Analysis of textile deformation during preforming for liquid composite moulding. PhD thesis, University of Nottingham. Access from the University of Nottingham repository: http://eprints.nottingham.ac.uk/10414/1/jw_thesis_final.pdf
More informationEXPERIMENTAL EVALUATION OF SHEAR STRENGTH OF WOVEN WEBBINGS
EXPERIMENTAL EVALUATION OF SHEAR STRENGTH OF WOVEN WEBBINGS Kevin L. Peil +, Ever J. Barbero +, Eduardo M. Sosa* + Department of Mechanical and Aerospace Engineering, West Virginia University (WVU), Morgantown,
More informationDEFORMATION PATTERN AND FAILURE CRITERIA OF WOVEN COMPOSITE PREFORM IN GENERAL BIAS EXTENSION
DEFORMATION PATTERN AND FAILURE CRITERIA OF WOVEN COMPOSITE PREFORM IN GENERAL BIAS EXTENSION B. Zhu 1,2*, T.X. Yu 1, X.M. Tao 2 1 Department of Mechanical Engineering, Hong Kong University of Science
More informationModeling non-isothermal thermoforming of fabricreinforced thermoplastic composites
Modeling non-isothermal thermoforming of fabricreinforced thermoplastic composites Dominic Schommer, Miro Duhovic, Joachim Hausmann Institut für Verbundwerkstoffe GmbH, Erwin-Schrödinger-Str., Building
More informationBIAS EXTENSION TEST STANDARD
BIAS EXTENSION TEST STANDARD Xiongqi Peng and Jian Cao Advanced Materials Processing Laboratory Department of Mechanical Engineering Northwestern University Evanston, IL August 2003 For Internal Use 1.
More informationMeasurement of meso-scale deformations for modelling textile composites
CompTest 2004 Measurement of meso-scale deformations for modelling textile composites P Potluri, D A Perez Ciurezu, R Ramgulam Textile Composites Group University of Manchester Institute of Science & Technology
More informationCHARACTERISING AND MODELLING TOOL-PLY FRICTION OF VISCOUS TEXTILE COMPOSITES
6 H INERNAIONAL CONFERENCE ON COMPOSIE MAERIALS CHARACERISING AND MODELLING OOL-PLY FRICION OF VISCOUS EXILE COMPOSIES Philip Harrison, Hua Lin 2, Mark Ubbink, Remko Akkerman, Karin van de Haar, Andrew
More informationMODELING THE FIBER SLIPPAGE DURING PREFORMING OF WOVEN FABRICS
MODELING THE FIBER SLIPPAGE DURING PREFORMING OF WOVEN FABRICS Chyi-Lang Lai and Wen-Bin Young * Department of Aeronautics and Astronautics National Cheng-Kung University Tainan, Taiwan 70101, ROC SUMMARY:
More informationA copy can be downloaded for personal non-commercial research or study, without prior permission or charge
Härtel, F., and Harrison, P. (2014) Evaluation of normalisation methods for uniaxial bias extension tests on engineering fabrics.composites Part A: Applied Science and Manufacturing, 37. pp. 61-69. ISSN
More informationPrediction of Draping Behavior of Woven Fabrics over Double-Curvature Moulds Using Finite Element Techniques
International Journal of Material and Mechanical Engineering, 2012, 1: 25-31 - 25 - Published Online May 2012 http://www.ijm-me.org Prediction of Draping Behavior of Woven Fabrics over Double-Curvature
More informationTHERMOFORMING SIMULATION OF THERMOPLASTIC TEXTILE COMPOSITES
ECCM6-6 TH EUROPEAN CONFERENCE ON COMPOSITE MATERIALS, Seville, Spain, 22-26 June 204 THERMOFORMING SIMULATION OF THERMOPLASTIC TEXTILE COMPOSITES P. Boisse *, P. Wang, 2, N. Hamila, Laboratoire de Mécanique
More informationIDENTIFICATION OF THE ELASTIC PROPERTIES ON COMPOSITE MATERIALS AS A FUNCTION OF TEMPERATURE
IDENTIFICATION OF THE ELASTIC PROPERTIES ON COMPOSITE MATERIALS AS A FUNCTION OF TEMPERATURE Hugo Sol, hugos@vub.ac.be Massimo Bottiglieri, Massimo.Bottiglieri@vub.ac.be Department Mechanics of Materials
More informationCOMPOSITE REINFORCEMENT FORMING SIMULATION: A MULTISCALE APPROACH
COMPOSITE REINFORCEMENT FORMING SIMULATION: A MULTISCALE APPROACH N. Hamila A. Khan S. Gatouillat E. De Luycker E. Vidal-Sallé T. Mabrouki P. Boisse Université de Lyon, LaMCoS, INSA-Lyon Philippe.Boisse@insa-lyon.fr
More informationNon-conventional Glass fiber NCF composites with thermoset and thermoplastic matrices. F Talence, France Le Cheylard, France
20 th International Conference on Composite Materials Copenhagen, 19-24th July 2015 Non-conventional Glass fiber NCF composites with thermoset and thermoplastic matrices. Thierry Lorriot 1, Jalal El Yagoubi
More information24 th October 2008 Glasgow eprints Service https://eprints.gla.ac.uk
Harrison, P. and Wiggers, J. and Long,.C. (008) Normalisation of shear test data for rate-independent compressible fabrics. Journal of Composite Materials 4():pp. 315-344. http://eprints.gla.ac.uk/4650/
More informationThe bias-extension test for the analysis of in-plane shear properties of textile composite reinforcements and prepregs: a review
The bias-extension test for the analysis of in-plane shear properties of textile composite reinforcements and prepregs: a review P. Boisse, N. Hamila, E. Guzman-Maldonado, A Madeo, G. Hivet, F. Dell Isola
More informationTEXTILE IMPREGNATION WITH THERMOPLASTIC RESIN MODELS AND APPLICATION
TEXTILE IMPREGNATION WITH THERMOPLASTIC RESIN MODELS AND APPLICATION Richard Loendersloot 1, Wouter Grouve 2, Edwin Lamers 3 and Sebastiaan Wijskamp 4 1 Applied Mechanics, University of Twente, P.O. Box
More informationFRICTION TESTING OF THERMOPLASTIC COMPOSITES
FRICTION TESTING OF THERMOPLASTIC COMPOSITES ULRICH SACHS MSc (a), SEBASTIAAN HAANAPPEL MSc (a), Dr. BERT RIETMAN (b) and Prof. REMKO AKKERMAN (a),(b) a) TPRC, University of Twente, Drienerlolaan 5, P.O.
More informationSimulation of wrinkling during textile composite reinforcement forming. Influence of tensile, in-plane shear and bending stiffnesses
Simulation of wrinkling during textile composite reinforcement forming. Influence of tensile, in-plane shear and bending stiffnesses P. Boisse, N. Hamila, E. Vidal-Sallé, F. Dumont To cite this version:
More informationSIMULATION OF THE PREFORMING STEP FOR FLAX DRY WOVEN FABRICS
SIMULATION OF THE PREFORMING STEP FOR FLAX DRY WOVEN FABRICS C. Tephany a*, D. Soulat b, P. Ouagne a, J. Gillibert a a Laboratoire PRISME, Université d Orléans, 8 rue Léonard de Vinci, 45072 Orléans cedex
More informationIn-situ local strain measurement in textile composites with embedded optical fibre sensors
In-situ local strain measurement in textile composites with embedded optical fibre sensors S. Daggumati, E. Voet, I. De Baere, W. Van Paepegem & J. Degrieck Ghent University, Department of Materials Science
More informationSlow Velocity Flow Fields in Composite Materials
Slow Velocity Flow Fields in Composite Materials A Coupled Problem by the Homogenization Method Noboru Kikuchi and His Associates The University of Michigan Ann Arbor, MI 48109, USA Major Contributors
More informationAn overview of Carbon Fiber modeling in LS-DYNA. John Zhao October 23 th 2017
An overview of Carbon Fiber modeling in LS-DYNA John Zhao zhao@lstc.com October 23 th 2017 Outline Manufacturing of Carbon Fiber Compression molding *MAT_277 & 278 *MAT_293 *MAT_249 Resin transform molding
More informationPLY INTERFACE ANGLES TO PROMOTE AUTOMATED FORMING OF AEROSPACE STRUCTURES
21 st International Conference on Composite Materials Xi an, 20-25 th August 2017 PLY INTERFACE ANGLES TO PROMOTE AUTOMATED FORMING OF AEROSPACE STRUCTURES K. J. Johnson 1, A. T. Rhead 2, E. G. Loukaides
More informationCHEM-E2200: Polymer blends and composites Fibre architecture and principles of reinforcement
CHEM-E2200: Polymer blends and composites Fibre architecture and principles of reinforcement Mark Hughes 19 th September 2016 Outline Fibre architecture Volume fraction and the rule of mixtures Principle
More informationOPTIMAL FIBER PLACEMENT INCLUDING EFFECTS OF EMBROIDERY
THE 19 TH INTERNATIONAL CONFERENCE ON COMPOSITE MATERIALS OPTIMAL FIBER PLACEMENT INCLUDING EFFECTS OF EMBROIDERY T. Nishida 1 T. Ieda 2 * A. Senba 2 1 Department of Aerospace Engineering Nagoya University
More informationMODELING OF THE BEHAVIOR OF WOVEN LAMINATED COMPOSITES UNTIL RUPTURE
MODELING OF THE BEHAVIOR OF WOVEN LAMINATED COMPOSITES UNTIL RUPTURE Jean Paul Charles, Christian Hochard,3, Pierre Antoine Aubourg,3 Eurocopter, 375 Marignane cedex, France Unimeca, 6 rue J. Curie, 3453
More informationComposite angle ply laminates and netting analysis
10.1098/rspa.2002.1066 FirstCite e-publishing Composite angle ply laminates and netting analysis By J. T. Evans and A. G. Gibson School of Mechanical and Systems Engineering, University of Newcastle upon
More informationGB/T / ISO 527-1:1993
Translated English of Chinese Standard: GB/T1040.1-2006 www.chinesestandard.net Sales@ChineseStandard.net GB NATIONAL STANDARD OF THE PEOPLE S REPUBLIC OF CHINA ICS 83.080.01 G 31 GB/T 1040.1-2006 / ISO
More informationFailure analysis of serial pinned joints in composite materials
Indian Journal of Engineering & Materials Sciences Vol. 18, April 2011, pp. 102-110 Failure analysis of serial pinned joints in composite materials Alaattin Aktaş* Department of Mechanical Engineering,
More informationLOCKING AND STABILITY OF 3D TEXTILE COMPOSITE REINFORCEMENTS DURING FORMING
10th International Conference on Composite Science and Technology ICCST/10 A.L. Araújo, J.R. Correia, C.M. Mota Soares, et al. (Editors) IDMEC 015 LOCKING AND STABILITY OF 3D TEXTILE COMPOSITE REINFORCEMENTS
More informationBIAXIAL STRENGTH INVESTIGATION OF CFRP COMPOSITE LAMINATES BY USING CRUCIFORM SPECIMENS
BIAXIAL STRENGTH INVESTIGATION OF CFRP COMPOSITE LAMINATES BY USING CRUCIFORM SPECIMENS H. Kumazawa and T. Takatoya Airframes and Structures Group, Japan Aerospace Exploration Agency 6-13-1, Ohsawa, Mitaka,
More informationCONTRIBUTIONS TO THE PROCESS MODELLING OF RESIN INFUSION UNDER FLEXIBLE TOOLING (RIFT) MANUFACTURING FOR COMPOSITE AEROSTRUCTURES
THE 19 TH INTERNATIONAL CONFERENCE ON COMPOSITE MATERIALS CONTRIBUTIONS TO THE PROCESS MODELLING OF RESIN INFUSION UNDER FLEXIBLE TOOLING (RIFT) MANUFACTURING FOR COMPOSITE AEROSTRUCTURES R.S. Pierce 1
More informationINFLUENCE KINDS OF MATERIALS ON THE POISSON S RATIO OF WOVEN FABRICS
ISSN 1846-6168 (Print), ISSN 1848-5588 (Online) ID: TG-217816142553 Original scientific paper INFLUENCE KINDS OF MATERIALS ON THE POISSON S RATIO OF WOVEN FABRICS Željko PENAVA, Diana ŠIMIĆ PENAVA, Željko
More informationAn Analytical Study of Initial Shear Behavior of Plain Woven Hybrid Fabrics
JOURNAL OF TEXTILES AND POLYMERS, VOL. 4, NO., JANUARY 206 9 An Analytical Study of Initial Shear Behavior of Plain Woven Hybrid Fabrics Majid Tehrani-Dehkor and Hooshang Nosraty Abstract During recent
More informationASPECTS CONCERNING TO THE MECHANICAL PROPERTIES OF THE GLASS / FLAX / EPOXY COMPOSITE MATERIAL
5 th International Conference Advanced Composite Materials Engineering COMAT 2014 16-17 October 2014, Braşov, Romania ASPECTS CONCERNING TO THE MECHANICAL PROPERTIES OF THE GLASS / FLAX / EPOXY COMPOSITE
More informationMESO-SCALE MODELLING IN THERMOPLASTIC 5-HARNESS SATIN WEAVE COMPOSITE
MESO-SCALE MODELLING IN THERMOPLASTIC 5-HARNESS SATIN WEAVE COMPOSITE S. Daggumati a*,i. De Baere a, W. Van Paepegem a, J. Degrieck a, J. Xu b, S.V. Lomov b, I. Verpoest b a Ghent University, Dept. of
More informationNUMERICAL SIMULATION OF DAMAGE IN THERMOPLASTIC COMPOSITE MATERIALS
5 th European LS-DYNA Users Conference Composites NUMERICAL SIMULATION OF DAMAGE IN THERMOPLASTIC COMPOSITE MATERIALS Kevin Brown 1, Richard Brooks, Nicholas Warrior School of Mechanical, Materials and
More informationMODELLING AND SIMULATION OF THE MECHANICAL BEHAVIOUR OF WEFT-KNITTED FABRICS FOR TECHNICAL APPLICATIONS
AUTEX Research Journal, Vol. 3, No4, December 003 AUTEX MODELLING AND SIMULATION OF THE MECHANICAL BEHAVIOUR OF WEFT-KNITTED FABRICS FOR TECHNICAL APPLICATIONS Part II: 3D model based on the elastica theory
More informationMODELING AND CHARACTERIZATION OF THERMOPLASTIC COMPOSITES PEEK/CARBON
THE 19 TH INTERNATIONAL CONFERENCE ON COMPOSITE MATERIALS MODELING AND CHARACTERIZATION OF THERMOPLASTIC COMPOSITES PEEK/CARBON 1 Introduction K. Kouwonou 1, X-T. Pham* 1 and G. Lebrun 2 1 Department of
More informationA Thermomechanical Constitutive Model for Fibrous Reinforcements
A Thermomechanical Constitutive Model for Fibrous Reinforcements J.J. Cheng a, P.A. Kelly a, S. Bickerton b a Department of Engineering Science, School of Engineering b Department of Mechanical Engineering,
More informationMicro-meso draping modelling of non-crimp fabrics
Micro-meso draping modelling of non-crimp fabrics Oleksandr Vorobiov 1, Dr. Th. Bischoff 1, Dr. A. Tulke 1 1 FTA Forschungsgesellschaft für Textiltechnik mbh 1 Introduction Non-crimp fabrics (NCFs) are
More informationMULTI-SCALE MODELLING OF FIBRE BUNDLES
THE 19 TH INTERNATIONAL CONFERENCE ON COMPOSITE MATERIALS MULTI-SCALE MODELLING OF FIBRE BUNDLES N. D. Chakladar 1, P. Mandal 1 *, P. Potluri 2 1 School of Mechanical, Aerospace and Civil Engineering,
More informationIMPACT DAMAGE TO 3D WOVEN CFRP COMPOSITE PLATES
IMPACT DAMAGE TO 3D WOVEN CFRP COMPOSITE PLATES G. Zumpano 1,3, MPF Sutcliffe 1, C Monroy Aceves 1, WJ Stronge 1, M. Fox 2 1 Cambridge University Engineering Department Trumpington Street, Cambridge, CB2
More informationComputational Methods and Experimental Measurements XII 909
Computational Methods and Experimental Measurements XII 909 Modelling of a LPM filling process with special consideration of viscosity characteristics and its influence on the microstructure of a non-crimp
More informationA SELF-INDICATING MODE I INTERLAMINAR TOUGHNESS TEST
A SELF-INDICATING MODE I INTERLAMINAR TOUGHNESS TEST P. Robinson The Composites Centre, Department of Aeronautics, Imperial College London South Kensington, London, SW7 2AZ, UK p.robinson@imperial.ac.uk
More informationNUMERICAL MODELLING OF COMPOSITE PIN- JOINTS AND EXPERIMENTAL VALIDATION
NUMERICAL MODELLING OF COMPOSITE PIN- JOINTS AND EXPERIMENTAL VALIDATION Fabrice PIERRON*, François CERISIER*, and Michel GRÉDIAC** * SMS/ Département Mécanique et Matériaux, École Nationale Supérieure
More informationIn-Plane Shear Characterisation of Uni-Directionally Reinforced Thermoplastic Melts
In-Plane Shear Characterisation of Uni-Directionally Reinforced Thermoplastic Melts S.P. Haanappel, R. ten Thije, U. Sachs, A.D. Rietman and R. Akkerman, Thermoplastic Composite Research Centre, University
More informationANALYSIS OF WOVEN REINFORCEMENT PREFORMING USING AN EXPERIMENTAL APPROACH
ANALYSIS OF WOVEN REINFORCEMENT PREFORMING USING AN EXPERIMENTAL APPROACH G. Hivet 1, S. Allaoui 1, D. Soulat 1, A. Wendling 1, S. Chatel 2 1 Institut PRISME/MMH, Université d Orléans, 8 rue Léonard de
More informationModelling the nonlinear shear stress-strain response of glass fibrereinforced composites. Part II: Model development and finite element simulations
Modelling the nonlinear shear stress-strain response of glass fibrereinforced composites. Part II: Model development and finite element simulations W. Van Paepegem *, I. De Baere and J. Degrieck Ghent
More informationFOLDING OF WOVEN COMPOSITE STRUCTURES
FOLDING OF WOVEN COMPOSITE STRUCTURES J.C.H. Yee and S. Pellegrino 1 Department of Engineering, University of Cambridge Trumpington Street, Cambridge CB2 1PZ, UK ABSTRACT This paper investigates one-ply
More informationChapter 12. Static Equilibrium and Elasticity
Chapter 12 Static Equilibrium and Elasticity Static Equilibrium Equilibrium implies that the object moves with both constant velocity and constant angular velocity relative to an observer in an inertial
More informationINDUSTRIAL FORMING SIMULATION OF MULTI-LAYERED UD NON-CRIMP-FABRICS. 13. LS-DYNA FORUM, , BAMBERG.
Sebastian Kreissl, Thomas Senner, Arnulf Lipp, Josef Meinhardt. INDUSTRIAL FORMING SIMULATION OF MULTI-LAYERED UD NON-CRIMP-FABRICS. 13. LS-DYNA FORUM, 07.10.2014, BAMBERG. OUTLINE. BMW i. Production Process
More informationCOMPARISON OF WETTABILITY AND CAPILLARY EFFECT EVALUATED BY DIFFERENT CHARACTERIZING METHODS
18 TH INTERNATIONAL CONFERENCE ON COMPOSITE MATERIALS COMPARISON OF WETTABILITY AND CAPILLARY EFFECT EVALUATED BY DIFFERENT CHARACTERIZING METHODS S.K. Wang*, M. Li*, Y.Z. Gu, Y.X. Li and Z.G. Zhang Key
More informationC.J. Bennett, W. Sun Department of Mechanical, Materials and Manufacturing Engineering, University of Nottingham, Nottingham NG7 2RD, UK
Optimisation of material properties for the modelling of large deformation manufacturing processes using a finite element model of the Gleeble compression test C.J. Bennett, W. Sun Department of Mechanical,
More informationSupplementary Information to the article entitled: Internally Architectured Materials with Directionally Asymmetric Friction
Supplementary Information to the article entitled: Internally Architectured Materials with Directionally Asymmetric Friction Ehsan Bafekrpour 1,2, Arcady Dyskin 3, Elena Pasternak 4, Andrey Molotnikov
More informationALIGNED FLAX FIBRE/POLYLACTATE COMPOSITES A MATERIALS MODEL SYSTEM TO SHOW THE POTENTIAL OF BIOCOMPOSITES IN ENGINEERING APPLICATIONS
ALIGNED FLAX FIBRE/POLYLACTATE COMPOSITES A MATERIALS MODEL SYSTEM TO SHOW THE POTENTIAL OF BIOCOMPOSITES IN ENGINEERING APPLICATIONS Bo Madsen 1, Hans Lilholt 1, Anders Thygesen 2, Elaine Arnold 3, Brendon
More informationProject PAJ2 Dynamic Performance of Adhesively Bonded Joints. Report No. 3 August Proposed Draft for the Revision of ISO
NPL Report CMMT(A)81 Project PAJ2 Dynamic Performance of Adhesively Bonded Joints Report No. 3 August 1997 Proposed Draft for the Revision of ISO 11003-2 Adhesives - Determination of Shear Behaviour of
More informationTransactions on Engineering Sciences vol 21, 1998 WIT Press, ISSN
Micromechanical modelling of textile composites using variational principles A. Prodromou, Ph. Vandeurzen, G. Huysmans, J. Ivens & I. Verpoest Department ofmetallurgy and Materials Engineering, Katholieke
More informationWe are IntechOpen, the first native scientific publisher of Open Access books. International authors and editors. Our authors are among the TOP 1%
We are IntechOpen, the first native scientific publisher of Open Access books 3,350 108,000 1.7 M Open access books available International authors and editors Downloads Our authors are among the 151 Countries
More informationSCALING EFFECTS IN THE LOW VELOCITY IMPACT RESPONSE OF FIBRE METAL
SCALING EFFECTS IN THE LOW VELOCITY IMPACT RESPONSE OF FIBRE METAL LAMINATES J. G. Carrillo 1, S. McKown 1, M. Mujib 1 and W. J. Cantwell 1. R. Day 2 1 Department of Engineering, University of Liverpool,
More informationStress-strain response and fracture behaviour of plain weave ceramic matrix composites under uni-axial tension, compression or shear
Xi an 2-25 th August 217 Stress-strain response and fracture behaviour of plain weave ceramic matrix composites under uni-axial tension compression or shear Heyin Qi 1 Mingming Chen 2 Yonghong Duan 3 Daxu
More informationInfluence of the filament winding process variables on the mechanical behavior of a composite pressure vessel
Influence of the filament winding process variables on the mechanical behavior of a composite pressure vessel G. Vargas 1 & A. Miravete 2 1 Universidad Pontificia Bolivariana, Facultad de Ingeniería Mecánica,
More informationA RESEARCH ON NONLINEAR STABILITY AND FAILURE OF THIN- WALLED COMPOSITE COLUMNS WITH OPEN CROSS-SECTION
A RESEARCH ON NONLINEAR STABILITY AND FAILURE OF THIN- WALLED COMPOSITE COLUMNS WITH OPEN CROSS-SECTION H. Debski a*, J. Bienias b, P. Jakubczak b a Faculty of Mechanical Engineering, Department of Machine
More informationA FINITE ELEMENT MODEL TO PREDICT MULTI- AXIAL STRESS-STRAIN RESPONSE OF CERAMIC MATRIX COMPOSITES WITH STRAIN INDUCED DAMAGE
A FINITE ELEMENT MODEL TO PREDICT MULTI- AXIAL STRESS-STRAIN RESPONSE OF CERAMIC MATRIX COMPOSITES WITH STRAIN INDUCED DAMAGE Daxu Zhang and D. R. Hayhurst School of Mechanical, Aerospace and Civil Engineering,
More informationTHE EFFECT OF GEOMETRICAL FEATURES OF NON-CRIMP FABRICS ON THE PERMEABILITY
THE EFFECT OF GEOMETRICAL FEATURES OF NON-CRIMP FABRICS ON THE PERMEABILITY Markus Nordlund and T. Staffan Lundström Division of Fluid Mechanics Luleå University of Technology SE-971 87 Luleå, Sweden ABSTRACT
More informationCHEM-C2410: Materials Science from Microstructures to Properties Composites: basic principles
CHEM-C2410: Materials Science from Microstructures to Properties Composites: basic principles Mark Hughes 14 th March 2017 Today s learning outcomes To understand the role of reinforcement, matrix and
More informationRHEOLOGICAL CHARACTERIZATION OF THERMOSETTING RES- IN SYSTEM WITH THERMOPLASTIC FUNCTIONAL LAYER
21 st International Conference on Composite Materials Xi an, 20-25 th August 2017 RHEOLOGICAL CHARACTERIZATION OF THERMOSETTING RES- IN SYSTEM WITH THERMOPLASTIC FUNCTIONAL LAYER W. Surjoseputro 1, G.
More informationResearch interests and past experience VARIABILITY IN LIQUID COMPOSITE MOULDING TECHNIQUES: PROCESS ANALYSIS AND CONTROL.
Research interests and past experience VARIABILITY IN LIQUID COMPOSITE MOULDING TECHNIQUES: PROCESS ANALYSIS AND CONTROL Nuno Correia FEUP 17 November 2005 INEGI Composite Materials and Structures Research
More informationRESPONSE SURFACES OF MECHANICAL BEHAVIOR OF DRY WOVEN FABRICS UNDER COMBINED LOADINGS
THE 19 TH INTERNATIONAL CONFERENCE ON COMPOSITE MATERIALS RESPONSE SURFACES OF MECHANICAL BEHAVIOR OF DRY WOVEN FABRICS UNDER COMBINED LOADINGS M. Komeili, A.S. Milani* School of Engineering, University
More informationKeywords: textile composites, braided fabric, dynamic property, fracture aspect, matrix hybrid
Mechanical Properties and Fracture Behavior of Hybrid Braided Composite Tube Yuki Sasaki, Yoshitaka Tanaka, Akio Ohtani, Asami Nakai, Hiroyuki Hamada Kyoto Institute of Technology Matsugasaki, Sakyo-ku,
More informationThermo-Elastic Behaviour of Single Ply Triaxial Woven Fabric Composites
47th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Confere 1-4 May 26, Newport, Rhode Island AIAA 26-1899 Thermo-Elastic Behaviour of Single Ply Triaxial Woven Fabric Composites
More informationPERMEABILITY PREDICTION IN POROUS MEDIA WITH COMPLEX 3D ARCHITECTURES IN A TRI- PERIODIC COMPUTATIONAL DOMAIN
PERMEABILITY PREDICTION IN POROUS MEDIA WITH COMPLEX 3D ARCHITECTURES IN A TRI- PERIODIC COMPUTATIONAL DOMAIN W. R. Hwang 1, J. F. Wang 1,2 and H. L. Liu 1 1 School of Mechanical and Aerospace Engineering,
More informationPERMEABILITY OF TEXTILE REINFORCEMENTS: SIMULATION; INFLUENCE OF SHEAR, NESTING AND BOUNDARY CONDITIONS; VALIDATION
FPCM-9 (2008) The 9th International Conference on Flow Processes in Composite Materials Montréal (Québec), Canada 8 ~ 10 JULY 2008 PERMEABILITY OF TEXTILE REINFORCEMENTS: SIMULATION; INFLUENCE OF SHEAR,
More informationLecture 4: PRELIMINARY CONCEPTS OF STRUCTURAL ANALYSIS. Introduction
Introduction In this class we will focus on the structural analysis of framed structures. We will learn about the flexibility method first, and then learn how to use the primary analytical tools associated
More informationA cooperative benchmark effort on testing of woven composites
A cooperative benchmark effort on testing of woven composites J. Cao, H.S. Cheng, T.X. Yu, B. Zhu, X.M. Tao, S.V. Lomov, Tz Stoilova, I. Verpoest, P. Boisse, Jérôme Launay, et al. To cite this version:
More informationISSN: ISO 9001:2008 Certified International Journal of Engineering Science and Innovative Technology (IJESIT) Volume 2, Issue 4, July 2013
Delamination Studies in Fibre-Reinforced Polymer Composites K.Kantha Rao, Dr P. Shailesh, K. Vijay Kumar 1 Associate Professor, Narasimha Reddy Engineering College Hyderabad. 2 Professor, St. Peter s Engineering
More informationANALYSIS OF YARN BENDING BEHAVIOUR
ANALYSIS OF YARN BENDING BEHAVIOUR B. Cornelissen, R. Akkerman Faculty of Engineering Technology, University of Twente Drienerlolaan 5, P.O. Box 217; 7500 AE Enschede, the Netherlands b.cornelissen@utwente.nl
More informationScienceDirect. Unit cell model of woven fabric textile composite for multiscale analysis. Anurag Dixit a *,Harlal Singh Mali b, R.K.
Available online at www.sciencedirect.com ScienceDirect Procedia Engineering 68 ( 2013 ) 352 358 The Malaysian International Tribology Conference 2013 (MITC2013) Unit cell model of woven fabric textile
More informationModule III - Macro-mechanics of Lamina. Lecture 23. Macro-Mechanics of Lamina
Module III - Macro-mechanics of Lamina Lecture 23 Macro-Mechanics of Lamina For better understanding of the macromechanics of lamina, the knowledge of the material properties in essential. Therefore, the
More informationMECHANICAL FAILURE OF A COMPOSITE HELICOPTER STRUCTURE UNDER STATIC LOADING
MECHANICAL FAILURE OF A COMPOSITE HELICOPTER STRUCTURE UNDER STATIC LOADING Steven Roy, Larry Lessard Dept. of Mechanical Engineering, McGill University, Montreal, Québec, Canada ABSTRACT The design and
More informationFOLDING AND DEPLOYMENT OF ULTRA-THIN COMPOSITE STRUCTURES
FOLDING AND DEPLOYMENT OF ULTRA-THIN COMPOSITE STRUCTURES H.M.Y.C. Mallikarachchi (1), S. Pellegrino (2) (1) University of Cambridge Department of Engineering, Trumpington Street, Cambridge CB2 1PZ, U.K.
More informationISO 178 INTERNATIONAL STANDARD. Plastics Determination of flexural properties. Plastiques Détermination des propriétés en flexion
INTERNATIONAL STANDARD ISO 178 Fourth edition 2001-12-15 Plastics Determination of flexural properties Plastiques Détermination des propriétés en flexion Reference number ISO 2001 PDF disclaimer This PDF
More informationExperiment Two (2) Torsional testing of Circular Shafts
Experiment Two (2) Torsional testing of Circular Shafts Introduction: Torsion occurs when any shaft is subjected to a torque. This is true whether the shaft is rotating (such as drive shafts on engines,
More informationCONSTITUTIVE MODELLING OF UD REINFORCED THERMOPLASTIC LAMINATES
CONSIUIVE MODEING OF UD REINFORCED HERMOPASIC AMINAES S.P.Haanappel 1, R. ten hije 2, R.Akkerman 1 1 University of wente, Faculty of Engineering echnology, Chair of Production echnology, Drienerlolaan,
More informationDEVELOPMENT OF THERMOELASTIC STRESS ANALYSIS AS A NON-DESTRUCTIVE EVALUATION TOOL
DEVELOPMENT OF THERMOELASTIC STRESS ANALYSIS AS A NON-DESTRUCTIVE EVALUATION TOOL S. Quinn*, R.K. Fruehmann and J.M. Dulieu-Barton School of Engineering Sciences University of Southampton Southampton SO17
More informationMODELLING OF THE THERMO-MECHANICAL PROPERTIES OF WOVEN COMPOSITES DURING THE CURE
TH 9 TH INTRNATIONAL ONFRN ON OMPOSIT MATRIALS MODLLING OF TH THRMO-MHANIAL PROPRTIS OF WOVN OMPOSITS DURING TH UR L. Khoun,, K.S. hallagulla,, P. Hubert Department of Mechanical ngineering, McGill University,
More informationThe Accuracy of Characteristic Length Method on Failure Load Prediction of Composite Pinned Joints
, June 30 - July 2, 2010, London, U.K. The Accuracy of Characteristic Length Method on Failure Load Prediction of Composite Pinned Joints O. Aluko, and Q. Mazumder Abstract An analytical model was developed
More informationAbvanced Lab Course. Dynamical-Mechanical Analysis (DMA) of Polymers
Abvanced Lab Course Dynamical-Mechanical Analysis (DMA) of Polymers M211 As od: 9.4.213 Aim: Determination of the mechanical properties of a typical polymer under alternating load in the elastic range
More informationKeywords: computer aided engineering, finite element analysis, multi scale modelling, fatigue life prediction
16 TH INTERNATIONAL CONFERENCE ON COMPOSITE MATERIALS 3D TEXTILE COMPOSITE MECHANICAL PROPERTIES Jonathan J. Crookston, Sreedhar Kari, Nicholas A. Warrior, I. Arthur Jones & Andrew C. Long University of
More informationOpen Research Online The Open University s repository of research publications and other research outputs
Open Research Online The Open University s repository of research publications and other research outputs Developments in efficiency and stability of fluid film bearings using new designs and test techniques
More informationNovel Experimental Method for Microscale Contact Analysis in Composite Fabric Forming
Experimental Mechanics (2015) 55:1475 1483 DOI 10.1007/s11340-015-0044-y Novel Experimental Method for Microscale Contact Analysis in Composite Fabric Forming O. Smerdova 1,2 & M.P.F. Sutcliffe 1 Received:
More informationPREDICTION OF OUT-OF-PLANE FAILURE MODES IN CFRP
PREDICTION OF OUT-OF-PLANE FAILURE MODES IN CFRP R. R. Pinto 1, P. P. Camanho 2 1 INEGI - Instituto de Engenharia Mecanica e Gestao Industrial, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal 2 DEMec,
More information