Acoustic emission analysis for failure identification in composite materials

Size: px
Start display at page:

Download "Acoustic emission analysis for failure identification in composite materials"

Transcription

1 Acoustic emission analysis for failure identification in composite materials Markus G. R. Sause Experimental Physics II Institute of Physics University of Augsburg 1. Motivation 2. Methods of AE analysis 3. Validation of classification procedure 4. Applications 5. Summary 1

2 1. Motivation failure of materials x After x DV y Before t all microscopic failure mechanisms in composites generate acoustic emission Freund et al. J. Appl. Mech-T. ASME (1972) Scruby J. Phys. E: Sci. Instrum (1987) Sause et al. J. Nondest. Eval. 29: (2010) 2

3 1 6.2 m m 1. Motivation failure of fiber reinforced composites fib e r b re a k a g e S p e c im e n 2 S p e c im e n 1 0 in te r-p ly d e la m in a tio n cross-ply stacking Challenges: complex modes of failure scatter of material properties Possibilities: improved failure theories improved testing methods acoustic emission for material research 3

4 1. Motivation failure of fiber reinforced composites Manhattan Bridge Space Shuttle Discovery CFRP structural part monitoring of structure in the field detection of abnormal behaviour indication of imminent failure acoustic emission for monitoring of structural integrity 4

5 2. Methods of AE analysis Amplitude [V] 0.1 AE signal Zeit [µs] Signal prediction Counting Localization Classification Amount Position Type of damage Material analysis 5

6 2. Methods of AE analysis AE source localization A E -s o u rc e t 0 d iffe re n c e in p ro p a g a tio n le n g th t 2 Dt-based localization: uses sensor array attached to specimen calculation of arrival time differences inverse calculation of source position visualization as function of load r S o u rc e r 2 grip region (0,0,0 ) r 1 t 1 force specimen Source density: low medium high 6

7 Intensität Intensity Intensity Intensität Intensity Intensität 2. Methods of AE analysis Identification of failure mechanisms Feature based pattern recognition and numerical validation: feature 1 feature 2 feature Frequenz [khz] Frequenz [khz] 0.10 Frequency [khz] Frequency [khz] Feature Extraction Frequenz [khz] Frequency [khz] feature 2 Definition of features Sause et al. J. Nondest. Eval. 29: (2010) Sause et al. Comp. Sci. Technol (2012) Sause et al. Pat. Rec.Letters 33: (2012) 7

8 Intensität Intensity Intensity Intensität Intensity Intensität 2. Methods of AE analysis Identification of failure mechanisms Feature based pattern recognition and numerical validation: feature 1 feature 2 feature Frequenz [khz] Frequenz [khz] 0.10 Frequency [khz] Frequency [khz] Feature Extraction Frequenz [khz] Frequency [khz] feature 2 Definition of features Application of pattern recognition algorithm Sause et al. J. Nondest. Eval. 29: (2010) Sause et al. Comp. Sci. Technol (2012) Sause et al. Pat. Rec.Letters 33: (2012) 8

9 Intensität Intensity Intensity Intensität Intensity Intensität 2. Methods of AE analysis Identification of failure mechanisms Feature based pattern recognition and numerical validation: feature 1 feature 2 feature Frequenz [khz] Frequenz [khz] 0.10 Frequency [khz] Frequency [khz] Feature Extraction Frequenz [khz] Frequency [khz] feature 2 Definition of features Application of pattern recognition algorithm Numerical validation Sause et al. J. Nondest. Eval. 29: (2010) Sause et al. Comp. Sci. Technol (2012) Sause et al. Pat. Rec.Letters 33: (2012) 9

10 3. Validation of classification procedure Which secondary knowledge can link AE signals and their source? in-situ methods Thermography Digital Image Correlation model predictions single source experiments model composites in-situ CT electromagnetic emission analytical calculations numerical modeling micromechanical experiments online microscopy 10

11 3. Validation of classification procedure FEM modeling of acoustic emission AE source modeling (simple example): force F 2D-plane von Mises stress coordinate system origin 5.2 mm 2 mm a crack growth y z x fixed constraint y x signal detection point explicit modeling of crack growth in material by cohesive zone type approach simultaneous modeling of acoustic signal propagation 11

12 3. Validation of classification procedure FEM modeling of acoustic emission AE source modeling (simple example): radiation radiation crack growth accumulated stress velocity field (near field) velocity field (far field) 12

13 3. Validation of classification procedure FEM modeling of acoustic emission AE source modeling (composite): AE sensors AE source: Matrix cracking t < 5x10-5 s Fiber-PML RVE Composite-PML crack model Fiber breakage t < 5x10-5 s Details of FEM modeling procedure: Sause et al. 19th ICCM, Montreal (2013) Sause et al. J. Nondest. Eval. 29: (2010) Sause et al. J. Acoustic Emission (2010) Sause et al. Composites Part B (2013) Sause J. Acoustic Emission 29 (2012) Sause J. Acoustic Emission 31:1 (2013) Sause et al. Sens. Act. A (2012) Sause et al. 29th EWGAE, Vienna (2010) source modeling signal propagation signal detection 13

14 Partial Power 2 [%] 3. Validation of classification procedure Partial Power 2 [%] Result of forward modeling procedure Comparison between simulation and experiment: Simulation Experiment Matrix crack, all angles (IFF) 60 Matrixcrack (IFF) Interfacial failure (DEF) Fiber breakage (FF) 60 Out-of-plane delamination (DEF) Fiber-Matrix debonding (DEF) Fiber bundle breakage (FF) Single Fiber breakage (FF) source-sensor distance Weighted Peak-Frequency [khz] Weighted Peak-Frequency [khz] similar cluster structures observed for experiment and simulation possibility to correlate experimental signal clusters to respective source mechanisms Model based validation of cluster origins 14

15 force Kraft [N] Akkumulierte number Anzahl of signals AE-Signale 4. Applications short beam shear test force specimen WD sensor F visible F AE AE onset Traversenweg [mm] cross-head displacement [mm] Mechanical parameters: velocity1 mm/min loading till first load drop Acoustic emission: detection using one WD sensor 40dB preamplification 10 MSPs acquisition rate 20 khz 1 MHz bandpass filter 15

16 2.2 m m m m 7 4 m m 4. Applications tensile testing m m [0 /0 /9 0 /0 /0 ] s y m [0 /0 /9 0 /9 0 /0 ] s y m [0 /9 0 /9 0 /9 0 /0 ] s y m 1 6 m m 1 W D -S e n s o r Specimens: Sigratex CE prepreg Cross-ply stacking with additional reinforcements in non-tapered regions m m 2 markers for strain measurement M a rk e r fü r D e h n u n g s m e s s u n g Mechanical parameters: velocity1 mm/min loading till load drop to 40% F max non-contact optical strain measurement K ra ft gripping region S p a n n - b e re ic h Acoustic emission: detection using two WD sensors 40dB preamplification 10 MSPs acquisition rate 20 khz 1 MHz bandpass filter 16

17 stress [MPa] 4. Applications accumulated number of signals acoustic emission recorded during tensile test 1600 Evolution of failure mechanisms: time [s] matrix cracks in off-axis plies Laminate [0/0/90/0/0] sym Matrix Cracking Interfacial failure Fiber breakage Stress-strain curve onset of delamination strain [%] onset of single filament failure 17

18 Stress [MPa] Strain [%] 4. Applications comparison to Puck s failure criteria Comparison to acoustic emission results: Calculated First ply failure Last ply failure Measured Onset Matrix cracking Onset Interfacial failure Onset Fiber breakage Maximum stress Calculated First ply failure Last ply failure Measured Onset Matrix cracking Onset Interfacial failure Onset Fiber breakage Maximum strain [0/0/90/0/0] sym [0/0/90/90/0] sym [0/90/90/90/0] sym [0/0/90/0/0] sym [0/0/90/90/0] sym [0/90/90/90/0] sym onset of first ply failure in good coincidence with onset of matrix cracking and interfacial failure onset of first filament failure preceeds last ply failure systematically 18

19 3-4 m m 4. Applications W D -S e n s o re n H ilfs s e n s o r DCB Double Cantilever Beam 1 C F K -P ro b e 2 3 Source density: R is s s p itz e m m x t 100 s x 60 mm crack progress vs. time pseudo-3d view unequal density of acoustic emission sources during experiment indicates changes in crack growth microscopic origin? 19

20 Akkumulierte number Anzahl of der signals SE-Signale [#] force Kraft [N] relative Relative accumulated akkumulierte signal Signalamplitude amplitudes [%] Hexcel RTM6= 168 [J/m²] HexPly914= 103[J/m²] 4. Applications DCB Double Cantilever Beam cross-head Traversenweg displacement [mm] [mm] matrix Matrixrisse cracking interfacial Interfaceversagen failure 2000 fiber Faserbruch breakage force-disp. Kraft-Weg Kurve curve 1500 SE-Ersteinsatz AE onset Matrixriss matrix cracking Lineare linear regression Regression Interfaceversagen interfacial failure Lineare linear regression Regression Faserbruch fiber breakage time Zeit [s] [s] systematic relationship between contributions of different failure mechanisms and the resulting fracture toughness values confirmed by microscopy investigations of fracture surface G G Ic - Wert [J/m²] Ic -value [J/m²] 20

21 5. Summary Summary: acoustic emission allows for 1. localization of active damage in composite materials 2. distinction of different failure types in composite materials acoustic emission allows for a variety of possibilities to diagnose and understand damage progression in fiber reinforced composites and hybrids other applications adressed in the past comprise bondings, ENF, NOLrings, CT-specimens, SENB-specimens, DENT-specimens, TDCBspecimens, peel-tests, fiber fragmentation, single filament testing, coating integrity, sandwich structures, burst pressure tests, windmill blades, 21

22 Acknowledgments: Dr. G. Obermeier Dr.-Ing. A.-M. Zelenyak M. Sc. T. Guglhör M. Sc. S. Kalafat M. Sc. A. Monden M. Sc. S. Richler M. Sc. E. Laukmanis Dipl. Phys. S. Gade B. Sc. F. Staab B. Sc. U. Buchner B. Sc. N. Anderle B. Sc. N. Schorer Thank you for your attention! S. Bessel Dipl.Ing. (FH) S. Schmitt 22

EWGAE 2010 Vienna, 8th to 10th September

EWGAE 2010 Vienna, 8th to 10th September EWGAE 21 Vienna, 8th to 1th September Influence of Specimen Geometry on Acoustic Emission Signals in Fiber Reinforced Composites: FEM-Simulations and Experiments Markus G. R. SAUSE, Siegfried HORN University

More information

Combined Acoustic Emission and Thermographic Testing of Fibre Composites

Combined Acoustic Emission and Thermographic Testing of Fibre Composites 19 th World Conference on Non-Destructive Testing 2016 Combined Acoustic Emission and Thermographic Testing of Fibre Composites Matthias GOLDAMMER 1, Markus G. R. SAUSE 2, Detlef RIEGER 1 1 Siemens AG

More information

Interlaminar fracture characterization in composite materials by using acoustic emission

Interlaminar fracture characterization in composite materials by using acoustic emission 5th International Symposium on NDT in Aerospace, 13-15th November 2013, Singapore Interlaminar fracture characterization in composite materials by using acoustic emission Ian SILVERSIDES 1, Ahmed MASLOUHI

More information

NUMERICAL INVESTIGATION OF DELAMINATION IN L-SHAPED CROSS-PLY COMPOSITE BRACKET

NUMERICAL INVESTIGATION OF DELAMINATION IN L-SHAPED CROSS-PLY COMPOSITE BRACKET NUMERICAL INVESTIGATION OF DELAMINATION IN L-SHAPED CROSS-PLY COMPOSITE BRACKET M.Gümüş a*, B.Gözlüklü a, D.Çöker a a Department of Aerospace Eng., METU, Ankara, Turkey *mert.gumus@metu.edu.tr Keywords:

More information

CHARACTERIZATION, ANALYSIS AND PREDICTION OF DELAMINATION IN COMPOSITES USING FRACTURE MECHANICS

CHARACTERIZATION, ANALYSIS AND PREDICTION OF DELAMINATION IN COMPOSITES USING FRACTURE MECHANICS Oral Reference Number: ICF100942OR CHARACTERIZATION, ANALYSIS AND PREDICTION OF DELAMINATION IN COMPOSITES USING FRACTURE MECHANICS T. Kevin O Brien U.S. Army Research Laboratory Vehicle Technology Directorate

More information

Fig. 1. Different locus of failure and crack trajectories observed in mode I testing of adhesively bonded double cantilever beam (DCB) specimens.

Fig. 1. Different locus of failure and crack trajectories observed in mode I testing of adhesively bonded double cantilever beam (DCB) specimens. a). Cohesive Failure b). Interfacial Failure c). Oscillatory Failure d). Alternating Failure Fig. 1. Different locus of failure and crack trajectories observed in mode I testing of adhesively bonded double

More information

Keywords: Adhesively bonded joint, laminates, CFRP, stacking sequence

Keywords: Adhesively bonded joint, laminates, CFRP, stacking sequence THE 19 TH INTERNATIONAL CONFERENCE ON COMPOSITE MATERIALS GLOBAL AND LOCAL INFLUENCE OF STACKING SEQUENCE ON THE STRENGTH OF ADHESIVELY BONDED JOINTS OF CFRP LAMINATES J. Rousseau*, P. Satthamnuwong DRIVE,

More information

EFFECT OF THERMAL FATIGUE ON INTRALAMINAR CRACKING IN LAMINATES LOADED IN TENSION

EFFECT OF THERMAL FATIGUE ON INTRALAMINAR CRACKING IN LAMINATES LOADED IN TENSION EFFECT OF THERMAL FATIGUE ON INTRALAMINAR CRACKING IN LAMINATES LOADED IN TENSION J.Varna and R.Joffe Dept of Applied Physics and Mechanical Engineering Lulea University of Technology, SE 97187, Lulea,

More information

Autodesk Helius PFA. Guidelines for Determining Finite Element Cohesive Material Parameters

Autodesk Helius PFA. Guidelines for Determining Finite Element Cohesive Material Parameters Autodesk Helius PFA Guidelines for Determining Finite Element Cohesive Material Parameters Contents Introduction...1 Determining Cohesive Parameters for Finite Element Analysis...2 What Test Specimens

More information

PATTERN RECOGNITION OF ACOUSTIC EMISSION SIGNAL DURING THE MODE I FRACTURE MECHANISMS IN CARBON-EPOXY COMPOSITE

PATTERN RECOGNITION OF ACOUSTIC EMISSION SIGNAL DURING THE MODE I FRACTURE MECHANISMS IN CARBON-EPOXY COMPOSITE More info about this article: h Czech Society for Nondestructive Testing 32 nd European Conference on Acoustic Emission Testing Prague, Czech Republic, September 7-9, 26 PATTERN RECOGNITION OF ACOUSTIC

More information

DAMAGE SIMULATION OF CFRP LAMINATES UNDER HIGH VELOCITY PROJECTILE IMPACT

DAMAGE SIMULATION OF CFRP LAMINATES UNDER HIGH VELOCITY PROJECTILE IMPACT 18 TH INTERNATIONAL CONFERENCE ON COMPOSITE MATERIALS DAMAGE SIMULATION OF CFRP LAMINATES UNDER HIGH VELOCITY PROJECTILE IMPACT A. Yoshimura 1*, T. Okabe, M. Yamada 3, T. Ogasawara 1, Y. Tanabe 3 1 Advanced

More information

Computational Analysis for Composites

Computational Analysis for Composites Computational Analysis for Composites Professor Johann Sienz and Dr. Tony Murmu Swansea University July, 011 The topics covered include: OUTLINE Overview of composites and their applications Micromechanics

More information

QUESTION BANK Composite Materials

QUESTION BANK Composite Materials QUESTION BANK Composite Materials 1. Define composite material. 2. What is the need for composite material? 3. Mention important characterits of composite material 4. Give examples for fiber material 5.

More information

University of Bristol - Explore Bristol Research. Early version, also known as pre-print

University of Bristol - Explore Bristol Research. Early version, also known as pre-print Hallett, S. R., & Wisnom, M. R. (2006). Numerical investigation of progressive damage and the effect of layup in notched tensile tests. Journal of Composite Materials, 40 (14), 1229-1245. DOI: 10.1177/0021998305057432

More information

Tensile behaviour of anti-symmetric CFRP composite

Tensile behaviour of anti-symmetric CFRP composite Available online at www.sciencedirect.com Procedia Engineering 1 (211) 1865 187 ICM11 Tensile behaviour of anti-symmetric CFRP composite K. J. Wong a,b, *, X. J. Gong a, S. Aivazzadeh a, M. N. Tamin b

More information

SIMULATION OF LAMB WAVE EXCITATION FOR DIFFERENT ELAS- TIC PROPERTIES AND ACOUSTIC EMISSION SOURCE GEOMETRIES

SIMULATION OF LAMB WAVE EXCITATION FOR DIFFERENT ELAS- TIC PROPERTIES AND ACOUSTIC EMISSION SOURCE GEOMETRIES SIMULATION OF LAMB WAVE EXCITATION FOR DIFFERENT ELAS- TIC PROPERTIES AND ACOUSTIC EMISSION SOURCE GEOMETRIES Abstract MARKUS G. R. SAUSE and SIEGFRIED HORN University of Augsburg, Institute for Physics,

More information

FRACTURE TOUGHNESS OF ADHESIVE BONDED COMPOSITE JOINTS UNDER MIXED MODE LOADING.

FRACTURE TOUGHNESS OF ADHESIVE BONDED COMPOSITE JOINTS UNDER MIXED MODE LOADING. FRACTURE TOUGHNESS OF ADHESIVE BONDED COMPOSITE JOINTS UNDER MIXED MODE LOADING. X. J. Gong, F. Hernandez, G. Verchery. ISAT - Institut Supérieur de l Automobile et des Transports, LRMA - Laboratoire de

More information

A SELF-INDICATING MODE I INTERLAMINAR TOUGHNESS TEST

A 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 information

Structural Health Monitoring of fibre composite structures by Acoustic Emission Analysis

Structural Health Monitoring of fibre composite structures by Acoustic Emission Analysis More info about this article: http://www.ndt.net/?id=23604 Structural Health Monitoring of fibre composite structures by Acoustic Emission Analysis Lars Schubert 1, Eberhard Schulze 1, Robert Neubeck 1

More information

Experimentally Calibrating Cohesive Zone Models for Structural Automotive Adhesives

Experimentally Calibrating Cohesive Zone Models for Structural Automotive Adhesives Experimentally Calibrating Cohesive Zone Models for Structural Automotive Adhesives Mark Oliver October 19, 2016 Adhesives and Sealants Council Fall Convention contact@veryst.com www.veryst.com Outline

More information

COMPARISON OF COHESIVE ZONE MODELS USED TO PREDICT DELAMINATION INITIATED FROM FREE-EDGES : VALIDATION AGAINST EXPERIMENTAL RESULTS

COMPARISON OF COHESIVE ZONE MODELS USED TO PREDICT DELAMINATION INITIATED FROM FREE-EDGES : VALIDATION AGAINST EXPERIMENTAL RESULTS COMPARISON OF COHESIVE ZONE MODELS USED TO PREDICT DELAMINATION INITIATED FROM FREE-EDGES : VALIDATION AGAINST EXPERIMENTAL RESULTS A. Uguen 1, L. Zubillaga 2, A. Turon 3, N. Carrère 1 1 Laboratoire Brestois

More information

Multi Disciplinary Delamination Studies In Frp Composites Using 3d Finite Element Analysis Mohan Rentala

Multi Disciplinary Delamination Studies In Frp Composites Using 3d Finite Element Analysis Mohan Rentala Multi Disciplinary Delamination Studies In Frp Composites Using 3d Finite Element Analysis Mohan Rentala Abstract: FRP laminated composites have been extensively used in Aerospace and allied industries

More information

SSRG International Journal of Mechanical Engineering (SSRG-IJME) volume1 issue5 September 2014

SSRG International Journal of Mechanical Engineering (SSRG-IJME) volume1 issue5 September 2014 Finite Element Modeling for Delamination Analysis of Double Cantilever Beam Specimen Mohammed Waseem H.S. 1, Kiran Kumar N. 2 1 Post Graduate Student, 2 Asst. Professor Dept. of Mechanical Engineering,

More information

EVALUATION OF DAMAGE DEVELOPMENT FOR NCF COMPOSITES WITH A CIRCULAR HOLE BASED ON MULTI-SCALE ANALYSIS

EVALUATION OF DAMAGE DEVELOPMENT FOR NCF COMPOSITES WITH A CIRCULAR HOLE BASED ON MULTI-SCALE ANALYSIS THE 19 TH INTERNATIONAL CONFERENCE ON COMPOSITE MATERIALS EVALUATION OF DAMAGE DEVELOPMENT FOR NCF COMPOSITES WITH A CIRCULAR HOLE BASED ON MULTI-SCALE ANALYSIS T. Kurashiki 1 *, Y. Matsushima 1, Y. Nakayasu

More information

Calculation of Energy Release Rate in Mode I Delamination of Angle Ply Laminated Composites

Calculation of Energy Release Rate in Mode I Delamination of Angle Ply Laminated Composites Copyright c 2007 ICCES ICCES, vol.1, no.2, pp.61-67, 2007 Calculation of Energy Release Rate in Mode I Delamination of Angle Ply Laminated Composites K. Gordnian 1, H. Hadavinia 1, G. Simpson 1 and A.

More information

ISSN: ISO 9001:2008 Certified International Journal of Engineering Science and Innovative Technology (IJESIT) Volume 2, Issue 4, July 2013

ISSN: 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 information

A 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 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 information

ANALYSIS OF ACOUSTIC EMISSION SIGNALS PRODUCED BY DIFFERENT CARBON FIBRE REINFORCED PLASTIC LAMINATES

ANALYSIS OF ACOUSTIC EMISSION SIGNALS PRODUCED BY DIFFERENT CARBON FIBRE REINFORCED PLASTIC LAMINATES ANALYSIS OF ACOUSTIC EMISSION SIGNALS PRODUCED BY DIFFERENT CARBON FIBRE REINFORCED PLASTIC LAMINATES V. Lopresto 1, C. Leone 1, G. Caprino 1 and I. de Iorio 2 1 Dept. of Materials and Production Engineering,

More information

Acoustic Emission Source Identification in Pipes Using Finite Element Analysis

Acoustic Emission Source Identification in Pipes Using Finite Element Analysis 31 st Conference of the European Working Group on Acoustic Emission (EWGAE) Fr.3.B.2 Acoustic Emission Source Identification in Pipes Using Finite Element Analysis Judith ABOLLE OKOYEAGU*, Javier PALACIO

More information

Experimental characterization of interlaminar fracture toughness of composite laminates assembled with three different carbon fiber lamina

Experimental characterization of interlaminar fracture toughness of composite laminates assembled with three different carbon fiber lamina Experimental characterization of interlaminar fracture toughness of composite laminates assembled with three different carbon fiber lamina Domenico Gentile University of Cassino and Southern Lazio, Cassino

More information

University of Bristol - Explore Bristol Research. Publisher's PDF, also known as Version of record

University of Bristol - Explore Bristol Research. Publisher's PDF, also known as Version of record Pernice, M. F., Ratcliffe, J. G., De Carvalho, N. V., & Hallett, S. R. (04). Investigating Delamination Migration in Multidirectional Tape Laminates. In ECCM6-6th European Conference on Composite Materials:

More information

ID-1160 REAL-TIME DETECTION AND EXPLICIT FINITE ELEMENT SIMULATION OF DELAMINATION IN COMPOSITE LAMINATES UNDER IMPACT LOADING

ID-1160 REAL-TIME DETECTION AND EXPLICIT FINITE ELEMENT SIMULATION OF DELAMINATION IN COMPOSITE LAMINATES UNDER IMPACT LOADING ID-116 REAL-TIME DETECTION AND EXPLICIT FINITE ELEMENT SIMULATION OF DELAMINATION IN COMPOSITE LAMINATES UNDER IMPACT LOADING K. Minnaar and M. Zhou = School of Mechanical Engineering Georgia Institute

More information

THE ROLE OF DELAMINATION IN NOTCHED AND UNNOTCHED TENSILE STRENGTH

THE ROLE OF DELAMINATION IN NOTCHED AND UNNOTCHED TENSILE STRENGTH THE ROLE OF DELAMINATION IN NOTCHED AND UNNOTCHED TENSILE STRENGTH M. R. Wisnom University of Bristol Advanced Composites Centre for Innovation and Science University Walk, Bristol BS8 1TR, UK M.Wisnom@bristol.ac.uk

More information

Modeling of Interfacial Debonding Induced by IC Crack for Concrete Beam-bonded with CFRP

Modeling of Interfacial Debonding Induced by IC Crack for Concrete Beam-bonded with CFRP Proceedings of the World Congress on Engineering 21 Vol II WCE 21, June 2 - July 1, 21, London, U.K. Modeling of Interfacial Debonding Induced by IC Crack for Concrete Beam-bonded with CFRP Lihua Huang,

More information

EVALUATION OF DEBONDING ENERGY RELEASE RATE OF EXTERNALLY BONDED FRP SHEETS FOR REHABILITATION OF INFRASTRUCTURES

EVALUATION OF DEBONDING ENERGY RELEASE RATE OF EXTERNALLY BONDED FRP SHEETS FOR REHABILITATION OF INFRASTRUCTURES EVALUATION OF DEBONDING ENERGY RELEASE RATE OF EXTERNALLY BONDED FRP SHEETS FOR REHABILITATION OF INFRASTRUCTURES Koji YAMAGUCHI 1, Isao KIMPARA 1, and Kazuro KAGEYAMA 1 1 Department of Environmental &

More information

Open-hole compressive strength prediction of CFRP composite laminates

Open-hole compressive strength prediction of CFRP composite laminates Open-hole compressive strength prediction of CFRP composite laminates O. İnal 1, A. Ataş 2,* 1 Department of Mechanical Engineering, Balikesir University, Balikesir, 10145, Turkey, inal@balikesir.edu.tr

More information

FRACTURE MECHANICS OF COMPOSITES WITH RESIDUAL STRESSES, TRACTION-LOADED CRACKS, AND IMPERFECT INTERFACES

FRACTURE MECHANICS OF COMPOSITES WITH RESIDUAL STRESSES, TRACTION-LOADED CRACKS, AND IMPERFECT INTERFACES Proc. 2 nd ESIS TC4 Conference on Polymers and Composites, in press, 1999 Author prepared reprint FRACTURE MECHANICS OF COMPOSITES WITH RESIDUAL STRESSES, TRACTION-LOADED CRACKS, AND IMPERFECT INTERFACES

More information

Effects with a matrix crack on monitoring by electrical resistance method

Effects with a matrix crack on monitoring by electrical resistance method Adv. Composite Mater., Vol. 13, No. 2, pp. 107 120 (2004) VSP 2004. Also available online - www.vsppub.com Effects with a matrix crack on monitoring by electrical resistance method AKIRA TODOROKI, MIHO

More information

EXPERIMENTAL CHARACTERIZATION AND COHESIVE LAWS FOR DELAMINATION OF OFF-AXIS GFRP LAMINATES

EXPERIMENTAL CHARACTERIZATION AND COHESIVE LAWS FOR DELAMINATION OF OFF-AXIS GFRP LAMINATES 20 th International Conference on Composite Materials Copenhagen, 19-24 th July 2015 EXPERIMENTAL CHARACTERIZATION AND COHESIVE LAWS FOR DELAMINATION OF OFF-AXIS GFRP LAMINATES Esben Lindgaard 1 and Brian

More information

SKIN-STRINGER DEBONDING AND DELAMINATION ANALYSIS IN COMPOSITE STIFFENED SHELLS

SKIN-STRINGER DEBONDING AND DELAMINATION ANALYSIS IN COMPOSITE STIFFENED SHELLS SKIN-STRINER DEBONDIN AND DELAMINATION ANALYSIS IN COMPOSITE STIFFENED SHELLS R. Rikards, K. Kalnins & O. Ozolinsh Institute of Materials and Structures, Riga Technical University, Riga 1658, Latvia ABSTRACT

More information

NUMERICAL AND EXPERIMENTAL ANALYSES OF MULTIPLE DELAMINATIONS IN CURVED COMPOSITE LAMINATES

NUMERICAL AND EXPERIMENTAL ANALYSES OF MULTIPLE DELAMINATIONS IN CURVED COMPOSITE LAMINATES THE 19 TH INTERNATIONAL CONFERENCE ON COMPOSITE MATERIALS NUMERICAL AND EXPERIMENTAL ANALYSES OF MULTIPLE DELAMINATIONS IN CURVED COMPOSITE LAMINATES A. Baldi 1 *, A. Airoldi 1, P. Belotti 1, P. Bettini

More information

MODE I AND MODE II FRACTURE BEHAVIOUR OF CARBON/GLASS HYBRID FILAMENT-WOUND RESIN TRANSFER MOULDED COMPOSITES

MODE I AND MODE II FRACTURE BEHAVIOUR OF CARBON/GLASS HYBRID FILAMENT-WOUND RESIN TRANSFER MOULDED COMPOSITES MODE I AND MODE II FRACTURE BEHAVIOUR OF CARBON/GLASS HYBRID FILAMENT-WOUND RESIN TRANSFER MOULDED COMPOSITES J. M. Taylor a*, S. Frenz b, C. Canturri c, S. Giannis b, E. S. Greenhalgh c a Rolls-Royce

More information

Fatigue Analysis of Wind Turbine Composites using Multi-Continuum Theory and the Kinetic Theory of Fracture

Fatigue Analysis of Wind Turbine Composites using Multi-Continuum Theory and the Kinetic Theory of Fracture Fatigue Analysis of Wind Turbine Composites using Multi-Continuum Theory and the Kinetic Theory of Fracture P. Greaves a, P. McKeever a, R. G. Dominy b, T. Koziara b a Narec, Offshore House, Albert Street,

More information

BIAXIAL STRENGTH INVESTIGATION OF CFRP COMPOSITE LAMINATES BY USING CRUCIFORM SPECIMENS

BIAXIAL 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 information

PREDICTION OF OUT-OF-PLANE FAILURE MODES IN CFRP

PREDICTION 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

PROGRESSIVE DAMAGE ANALYSES OF SKIN/STRINGER DEBONDING. C. G. Dávila, P. P. Camanho, and M. F. de Moura

PROGRESSIVE DAMAGE ANALYSES OF SKIN/STRINGER DEBONDING. C. G. Dávila, P. P. Camanho, and M. F. de Moura PROGRESSIVE DAMAGE ANALYSES OF SKIN/STRINGER DEBONDING C. G. Dávila, P. P. Camanho, and M. F. de Moura Abstract The debonding of skin/stringer constructions is analyzed using a step-by-step simulation

More information

COMELD TM JOINTS: A NOVEL TECHNIQUE FOR BONDING COMPOSITES AND METAL

COMELD TM JOINTS: A NOVEL TECHNIQUE FOR BONDING COMPOSITES AND METAL COMELD TM JOINTS: A NOVEL TECHNIQUE FOR BONDING COMPOSITES AND METAL F.J. Guild *, P.J. Hogg + and W. Tu School of Engineering and Materials Science, Queen Mary, University of London, London E1 4NS, UK

More information

Towards Affordable, Closed-Loop Recyclable Future Low Carbon Vehicles. Supervisors : Dr. L.T. Harper, Dr. M. Johnson, Prof. N.A.

Towards Affordable, Closed-Loop Recyclable Future Low Carbon Vehicles. Supervisors : Dr. L.T. Harper, Dr. M. Johnson, Prof. N.A. Towards Affordable, Closed-Loop Recyclable Future Low Carbon Vehicles Supervisors : Dr. L.T. Harper, Dr. M. Johnson, Prof. N.A. Warrior Moulding issues with CF/PP Now looking to use CF/PA6 consolidation

More information

Tomas Walander 1, Anders Biel, Ulf Stigh

Tomas Walander 1, Anders Biel, Ulf Stigh AN EVALUATION OF THE TEMPERATURE DEPENDENCE OF COHESIVE PROPERTIES FOR TWO STRUCTURAL EPOXY ADHESIVES Tomas Walander 1, Anders Biel, Ulf Stigh 1 Mechanics of materials, University of Skövde, Box 408, 541

More information

Numerical Simulation of the Mode I Fracture of Angle-ply Composites Using the Exponential Cohesive Zone Model

Numerical Simulation of the Mode I Fracture of Angle-ply Composites Using the Exponential Cohesive Zone Model Numerical Simulation of the Mode I Fracture of Angle-ply Composites Using the Exponential Cohesive Zone Model Numerical Simulation of the Mode I Fracture of Angle-ply Composites Using the Exponential Cohesive

More information

DYNAMIC DELAMINATION OF AERONAUTIC STRUCTURAL COMPOSITES BY USING COHESIVE FINITE ELEMENTS

DYNAMIC DELAMINATION OF AERONAUTIC STRUCTURAL COMPOSITES BY USING COHESIVE FINITE ELEMENTS DYNAMIC DELAMINATION OF AERONAUTIC STRUCTURAL COMPOSITES BY USING COHESIVE FINITE ELEMENTS M. Ilyas, F. Lachaud 1, Ch. Espinosa and M. Salaün Université de Toulouse, ISAE/DMSM, 1 avenue Edouard Belin,

More information

MICROMECHANICAL DEFORMATIONS IN PARTICULATE FILLED POLYMERS: THE EFFECT OF ADHESION

MICROMECHANICAL DEFORMATIONS IN PARTICULATE FILLED POLYMERS: THE EFFECT OF ADHESION MICROMECHANICAL DEFORMATIONS IN PARTICULATE FILLED POLYMERS: THE EFFECT OF ADHESION K. Renner, J. Móczó, B. Pukánszky Laboratory of Plastics and Rubber Technology, Department of Physical Chemistry and

More information

A fatigue design methodology for GRP composites in offshore underwater applications

A fatigue design methodology for GRP composites in offshore underwater applications A fatigue design methodology for GRP composites in offshore underwater applications Dr P. A. FRIEZE P A F A Consulting Engineers Limited, Hampton, Middx, UK INTRODUCTION Norsk Hydro Troll C field - floating

More information

INTERNAL STRAIN MEASUREMENTS IN CFRP PLATES SUBJECTED TO IMPACT LOAD USING FBG SENSORS

INTERNAL STRAIN MEASUREMENTS IN CFRP PLATES SUBJECTED TO IMPACT LOAD USING FBG SENSORS INTERNAL STRAIN MEASUREMENTS IN CFRP PLATES SUBJECTED TO IMPACT LOAD USING FBG SENSORS J. Frieden, J. Cugnoni, J. Botsis, Th. Gmür, D. Coric Laboratoire de Mécanique appliquée et d Analyse de Fiabilité

More information

SIMULATION OF BOND FAILURE IN RC BEAMS STRENGTHENED WITH FRP SHEETS SUBJECTED TO DYNAMIC/IMPACT LOADINGS

SIMULATION OF BOND FAILURE IN RC BEAMS STRENGTHENED WITH FRP SHEETS SUBJECTED TO DYNAMIC/IMPACT LOADINGS Proceedings of International Symposium on Bond Behaviour of FRP in Structures (BBFS 005) Chen and Teng (eds) 005 International Institute for FRP in Construction SIMULATION OF BOND FAILURE IN RC BEAMS STRENGTHENED

More information

Strength of GRP-laminates with multiple fragment damages

Strength of GRP-laminates with multiple fragment damages Strength of GRP-laminates with multiple fragment damages S. Kazemahvazi, J. Kiele, D. Zenkert Kungliga Tekniska Högskolan, KTH 100 44 Stockholm, Sweden sohrabk@kth.se SUMMARY The strength of glass fibre

More information

Identification of interface properties using Fibre Bragg Grating sensors in a fibre pull-out test Gabriel Dunkel, Laurent Humbert and John Botsis

Identification of interface properties using Fibre Bragg Grating sensors in a fibre pull-out test Gabriel Dunkel, Laurent Humbert and John Botsis Identification of interface properties using Fibre Bragg Grating sensors in a fibre pull-out test Gabriel Dunkel, Laurent Humbert and John Botsis Laboratory of Applied Mechanics and Reliability Analysis

More information

THE MUTUAL EFFECTS OF SHEAR AND TRANSVERSE DAMAGE IN POLYMERIC COMPOSITES

THE MUTUAL EFFECTS OF SHEAR AND TRANSVERSE DAMAGE IN POLYMERIC COMPOSITES THE 19 TH INTERNATIONAL CONFERENCE ON COMPOSITE MATERIALS THE MUTUAL EFFECTS OF SHEAR AND TRANSVERSE DAMAGE IN POLYMERIC COMPOSITES L.V. Smith 1 *, M. Salavatian 1 1 School of Mechanical and Materials

More information

Fracture Mechanics, Damage and Fatigue: Composites

Fracture Mechanics, Damage and Fatigue: Composites University of Liège Aerospace & Mechanical Engineering Fracture Mechanics, Damage and Fatigue: Composites Ludovic Noels Computational & Multiscale Mechanics of Materials CM3 http://www.ltas-cm3.ulg.ac.be/

More information

Application of fracture mechanics-based methodologies for failure predictions in composite structures

Application of fracture mechanics-based methodologies for failure predictions in composite structures Application of fracture mechanics-based methodologies for failure predictions in composite structures Zoltan Mikulik a, B. Gangadhara Prusty a, Rodney S. Thomson b, Donald W. Kelly a,* a School of Mechanical

More information

Transactions on Information and Communications Technologies vol 6, 1994 WIT Press, ISSN

Transactions on Information and Communications Technologies vol 6, 1994 WIT Press,   ISSN Prediction of composite laminate residual strength based on a neural network approach R. Teti & G. Caprino Department of Materials and Production Engineering, University of Naples 'Federico II', Abstract

More information

MULTISCALE AND MULTILEVEL ANALYSIS OF COMPOSITE STRUCTURES WITH BOLTED JOINTS

MULTISCALE AND MULTILEVEL ANALYSIS OF COMPOSITE STRUCTURES WITH BOLTED JOINTS MULTISCALE AND MULTILEVEL ANALYSIS OF COMPOSITE STRUCTURES WITH BOLTED JOINTS F.-X. Irisarri, J.-F. Maire* and N. Carrere ONERA, 9 av. de la Division Leclerc, 930 Châtillon, France francois-xavier.irisarri@onera.fr,

More information

FINITE ELEMENT ANALYSIS OF COMPOSITE MATERIALS

FINITE ELEMENT ANALYSIS OF COMPOSITE MATERIALS FINITE ELEMENT ANALYSIS OF COMPOSITE MATERIALS Ever J. Barbero Department of Mechanical and Aerospace Engineering West Virginia University USA CRC Press Taylor &.Francis Group Boca Raton London New York

More information

Modelling 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 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 information

ATMOSPHERIC PLASMA TREATMENT OF FIBER REINFORCED COMPOSITES FOR ADHESIVE BONDING

ATMOSPHERIC PLASMA TREATMENT OF FIBER REINFORCED COMPOSITES FOR ADHESIVE BONDING ATMOSPHERIC PLASMA TREATMENT OF FIBER REINFORCED COMPOSITES FOR ADHESIVE BONDING R. J. Zaldivar*, PhD, G. L. Steckel, PhD, J. P. Nokes, PhD, B. Morgan, PhD, and H. I. Kim, PhD The Aerospace Corporation,

More information

The Effects of Transverse Shear on the Delamination of Edge-Notch Flexure and 3-Point Bend Geometries

The Effects of Transverse Shear on the Delamination of Edge-Notch Flexure and 3-Point Bend Geometries The Effects of Transverse Shear on the Delamination of Edge-Notch Flexure and 3-Point Bend Geometries M. D. Thouless Department of Mechanical Engineering Department of Materials Science & Engineering University

More information

Numerical simulation of delamination onset and growth in laminated composites

Numerical simulation of delamination onset and growth in laminated composites Numerical simulation of delamination onset and growth in laminated composites G. Wimmer, C. Schuecker, H.E. Pettermann Austrian Aeronautics Research (AAR) / Network for Materials and Engineering at the

More information

Durability of bonded aircraft structure. AMTAS Fall 2016 meeting October 27 th 2016 Seattle, WA

Durability of bonded aircraft structure. AMTAS Fall 2016 meeting October 27 th 2016 Seattle, WA Durability of bonded aircraft structure AMTAS Fall 216 meeting October 27 th 216 Seattle, WA Durability of Bonded Aircraft Structure Motivation and Key Issues: Adhesive bonding is a key path towards reduced

More information

Thermomechanical Studies in Glass/Epoxy Composite Specimen during Tensile Loading

Thermomechanical Studies in Glass/Epoxy Composite Specimen during Tensile Loading Thermomechanical Studies in Glass/Epoxy Composite Specimen during Tensile Loading K. M. Mohamed Muneer, Raghu V. Prakash, and Krishnan Balasubramaniam Abstract This paper presents the results of thermo-mechanical

More information

Micromechanics of recycled composites

Micromechanics of recycled composites Monday, 21 st August 2011 Micromechanics of recycled composites for material optimisation and eco-design Soraia Pimenta soraia.pimenta07@imperial.ac.uk S T Pinho, P Robinson Motivation Introduction recycled

More information

Crack-initiation and fracture propagation in reservoir rocks

Crack-initiation and fracture propagation in reservoir rocks Crack-initiation and fracture propagation in reservoir rocks Srutarshi Pradhan Fracture & Flow meeting, January 2013, IMSc, Chennai, India 1 Dynamics of fracture Crack-growth in nano-materials onset of

More information

Finite element modelling of infinitely wide Angle-ply FRP. laminates

Finite element modelling of infinitely wide Angle-ply FRP. laminates www.ijaser.com 2012 by the authors Licensee IJASER- Under Creative Commons License 3.0 editorial@ijaser.com Research article ISSN 2277 9442 Finite element modelling of infinitely wide Angle-ply FRP laminates

More information

KINK BAND FORMATION OF FIBER REINFORCED POLYMER (FRP)

KINK BAND FORMATION OF FIBER REINFORCED POLYMER (FRP) KINK BAND FORMATION OF FIBER REINFORCED POLYMER (FRP) 1 University of Science & Technology Beijing, China, niukm@ustb.edu.cn 2 Tsinghua University, Department of Engineering Mechanics, Beijing, China,

More information

MESH MODELING OF ANGLE-PLY LAMINATED COMPOSITE PLATES FOR DNS AND IPSAP

MESH MODELING OF ANGLE-PLY LAMINATED COMPOSITE PLATES FOR DNS AND IPSAP 16 TH INTERNATIONAL CONFERENCE ON COMPOSITE MATERIALS MESH MODELING OF ANGLE-PLY LAMINATED COMPOSITE PLATES FOR DNS AND IPSAP Wanil Byun*, Seung Jo Kim*, Joris Wismans** *Seoul National University, Republic

More information

Effects of mesostructure on the in-plane properties of tufted carbon fabric composites

Effects of mesostructure on the in-plane properties of tufted carbon fabric composites Effects of mesostructure on the in-plane properties of tufted carbon fabric composites CompTest 2011, 14 th February 2011 Johannes W G Treiber Denis D R Cartié Ivana K Partridge j.treiber@cranfield.ac.uk

More information

Mixed-Mode Fracture Toughness Determination USING NON-CONVENTIONAL TECHNIQUES

Mixed-Mode Fracture Toughness Determination USING NON-CONVENTIONAL TECHNIQUES Mixed-Mode Fracture Toughness Determination USING NON-CONVENTIONAL TECHNIQUES IDMEC- Pólo FEUP DEMec - FEUP ESM Virginia Tech motivation fracture modes conventional tests [mode I] conventional tests [mode

More information

lightweight structures

lightweight structures Calculation methodology for lightweight structures Chalmers University of Technology Göteborg, Sweden Page 1 Acknowledgements Chalmers University of Technology,, PhD student Luis Sanchez SP Technical Research

More information

DESIGNING A FLEXIBLE BELLOWS COUPLING MADE FROM COMPOSITE MATERIALS USING NUMERICAL SIMULATIONS SVOČ FST 2018

DESIGNING A FLEXIBLE BELLOWS COUPLING MADE FROM COMPOSITE MATERIALS USING NUMERICAL SIMULATIONS SVOČ FST 2018 DESIGNING A FLEXIBLE BELLOWS COUPLING MADE FROM COMPOSITE MATERIALS USING NUMERICAL SIMULATIONS SVOČ FST 2018 Ing. Frantisek Sedlacek, University of West Bohemia, Univerzitni 8, 306 14, Pilsen, Czech Republic

More information

SCALING EFFECTS IN THE LOW VELOCITY IMPACT RESPONSE OF FIBRE METAL

SCALING 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 information

Numerical simulation of the crash behaviour of braided composites

Numerical simulation of the crash behaviour of braided composites 5th International CFK-Valley Stade Convention Numerical simulation of the crash behaviour of braided composites Stade, Dipl.-Ing. Ralf Matheis Institut für Kraftfahrzeuge RWTH Aachen University #110410

More information

In Situ Ultrasonic NDT of Fracture and Fatigue in Composites

In Situ Ultrasonic NDT of Fracture and Fatigue in Composites ECNDT 26 - Mo.2.6.5 In Situ Ultrasonic NDT of Fracture and Fatigue in Composites I. SOLODOV, K. PFLEIDERER, and G. BUSSE Institute for Polymer Testing and Polymer Science (IKP), Non-destructive Testing

More information

FATIGUE DAMAGE PROGRESSION IN PLASTICS DURING CYCLIC BALL INDENTATION

FATIGUE DAMAGE PROGRESSION IN PLASTICS DURING CYCLIC BALL INDENTATION FATIGUE DAMAGE PROGRESSION IN PLASTICS DURING CYCLIC BALL INDENTATION AKIO YONEZU, TAKAYASU HIRAKAWA, TAKESHI OGAWA and MIKIO TAKEMOTO Department of Mechanical Engineering, College of Science and Engineering,

More information

Fracture Mechanics of Composites with Residual Thermal Stresses

Fracture Mechanics of Composites with Residual Thermal Stresses J. A. Nairn Material Science & Engineering, University of Utah, Salt Lake City, Utah 84 Fracture Mechanics of Composites with Residual Thermal Stresses The problem of calculating the energy release rate

More information

Interaction of Z-pins with multiple mode II delaminations in composite laminates

Interaction of Z-pins with multiple mode II delaminations in composite laminates Interaction of Z-pins with multiple mode II delaminations in composite laminates Mehdi Yasaee *, Galal Mohamed, Stephen R. Hallett School of Aerospace, Transport and Manufacturing, Cranfield University,

More information

INITIATION AND PROPAGATION OF FIBER FAILURE IN COMPOSITE LAMINATES

INITIATION AND PROPAGATION OF FIBER FAILURE IN COMPOSITE LAMINATES THE 19 TH INTERNATIONAL CONFERENCE ON COMPOSITE MATERIALS INITIATION AND PROPAGATION OF FIBER FAILURE IN COMPOSITE LAMINATES E. Iarve 1,2*, D. Mollenhauer 1, T. Breitzman 1, K. Hoos 2, M. Swindeman 2 1

More information

DESIGNING DYNAMIC TESTS TO ASSESS RATE DEPENDENCE IN LARGE-SCALE CRACK BRIDGING

DESIGNING DYNAMIC TESTS TO ASSESS RATE DEPENDENCE IN LARGE-SCALE CRACK BRIDGING DESIGNING DYNAMIC TESTS TO ASSESS RATE DEPENDENCE IN LARGE-SCALE CRACK BRIDGING C. Lundsgaard-Larsen, 1 R. Massabò, 2 and B. N. Cox 3 1 Technical University of Denmark, Lyngby, Denmark 2 DICAT, University

More information

FREE EDGE DELAMINATION ONSET CRITERION

FREE EDGE DELAMINATION ONSET CRITERION FREE EGE ELAMINATION ONSET CRITERION G. MARION now, 2, formerl 3, R. HARRY 2, and F. LECUYER MEYSYS, 29 rue J. Rostand, 9873 ORSAY CEEX, FRANCE 2 Laboratoire de Génie Mécanique, IUT Bordeaux I, 3345 TALENCE

More information

FLOATING NODE METHOD AND VIRTUAL CRACK CLOSURE TECHNIQUE FOR MODELING MATRIX CRACKING- DELAMINATION MIGRATION

FLOATING NODE METHOD AND VIRTUAL CRACK CLOSURE TECHNIQUE FOR MODELING MATRIX CRACKING- DELAMINATION MIGRATION THE 19 TH INTERNATIONAL CONFERENCE ON COMPOSITE MATERIALS FLOATING NODE METHOD AND VIRTUAL CRACK CLOSURE TECHNIQUE FOR MODELING MATRIX CRACKING- DELAMINATION MIGRATION N. V. De Carvalho 1*, B. Y. Chen

More information

On characterising fracture resistance in mode-i delamination

On characterising fracture resistance in mode-i delamination 9 th International Congress of Croatian Society of Mechanics 18-22 September 2018 Split, Croatia On characterising fracture resistance in mode-i delamination Leo ŠKEC *, Giulio ALFANO +, Gordan JELENIĆ

More information

Published in: Composites Part B: Engineering. Document Version: Peer reviewed version

Published in: Composites Part B: Engineering. Document Version: Peer reviewed version Experimental and numerical studies on the impact response of damage-tolerant hybrid unidirectional/woven carbon-fibre reinforced composite laminates Liu, H., Falzon, B., & Tan, W. (2018). Experimental

More information

Tensile Stress Acoustic Constants of Unidirectional Graphite/Epoxy Composites

Tensile Stress Acoustic Constants of Unidirectional Graphite/Epoxy Composites Tensile Stress Acoustic Constants of Unidirectional Graphite/Epoxy Composites Journal of Reinforced Plastics and Composites, Vol. 9 (March, 1990) pp. 127-133 W. H. PROSSER NASA Langley Research Center

More information

Lecture #7: Basic Notions of Fracture Mechanics Ductile Fracture

Lecture #7: Basic Notions of Fracture Mechanics Ductile Fracture Lecture #7: Basic Notions of Fracture Mechanics Ductile Fracture by Dirk Mohr ETH Zurich, Department of Mechanical and Process Engineering, Chair of Computational Modeling of Materials in Manufacturing

More information

Micromechanical analysis of FRP hybrid composite lamina for in-plane transverse loading

Micromechanical analysis of FRP hybrid composite lamina for in-plane transverse loading Indian Journal of Engineering & Materials Sciences Vol. 15, October 2008, pp. 382-390 Micromechanical analysis of FRP hybrid composite lamina for in-plane transverse loading K Sivaji Babu a *, K Mohana

More information

Comparison between a Cohesive Zone Model and a Continuum Damage Model in Predicting Mode-I Fracture Behavior of Adhesively Bonded Joints

Comparison between a Cohesive Zone Model and a Continuum Damage Model in Predicting Mode-I Fracture Behavior of Adhesively Bonded Joints Copyright 2012 Tech Science Press CMES, vol.83, no.2, pp.169-181, 2012 Comparison between a Cohesive Zone Model and a Continuum Damage Model in Predicting Mode-I Fracture Behavior of Adhesively Bonded

More information

Finite Element Analysis of FRP Debonding Failure at the Tip of Flexural/Shear Crack in Concrete Beam

Finite Element Analysis of FRP Debonding Failure at the Tip of Flexural/Shear Crack in Concrete Beam Marquette University e-publications@marquette Civil and Environmental Engineering Faculty Research and Publications Civil and Environmental Engineering, Department of 12-1-2013 Finite Element Analysis

More information

APPLICATION OF A SCALAR STRAIN-BASED DAMAGE ONSET THEORY TO THE FAILURE OF A COMPLEX COMPOSITE SPECIMEN

APPLICATION OF A SCALAR STRAIN-BASED DAMAGE ONSET THEORY TO THE FAILURE OF A COMPLEX COMPOSITE SPECIMEN 28 TH INTERNATIONAL CONGRESS OF THE AERONAUTICAL SCIENCES APPLICATION OF A SCALAR STRAIN-BASED DAMAGE ONSET THEORY TO THE FAILURE OF A COMPLEX COMPOSITE SPECIMEN Tuyen Tran*, Dan Simkins**, Shen Hin Lim*,

More information

Experimental Techniques for Characterization of Carbon Fiber-Reinforced Epoxy THESIS

Experimental Techniques for Characterization of Carbon Fiber-Reinforced Epoxy THESIS Experimental Techniques for Characterization of Carbon Fiber-Reinforced Epoxy THESIS Presented in Partial Fulfillment of the Requirements for the Degree Master of Science in the Graduate School of The

More information

Fatigue life. prediction of composites. and composite. structures. Vassilopoulos WOQDHEAD PUBLISHING LIMITED. Anastasios P. Cambridge New Delhi

Fatigue life. prediction of composites. and composite. structures. Vassilopoulos WOQDHEAD PUBLISHING LIMITED. Anastasios P. Cambridge New Delhi Fatigue life prediction of composites and composite structures Anastasios P. Edited by Vassilopoulos CRC Press Boca Raton Boston New York Washington, DC WOQDHEAD PUBLISHING LIMITED Oxford Cambridge New

More information

Keywords: CFRP, compressive failure, kink-band, cohesive zone model. * Corresponding author

Keywords: CFRP, compressive failure, kink-band, cohesive zone model. * Corresponding author THE 19 TH INTERNATIONAL CONFERENCE ON COMPOSITE MATERIALS AN EXPERIMENTAL METHOD TO DETERMINE THE CRITICAL ENERGY RELEASE RATE ASSOCIATED WITH LONGITUDINAL COMPRESSIVE FAILURE IN CFRP D. Svensson 1 *,

More information

Advanced Acoustic Emission Data Analysis Pattern Recognition & Neural Networks Software

Advanced Acoustic Emission Data Analysis Pattern Recognition & Neural Networks Software Applications Advanced Acoustic Emission Data Analysis Pattern Recognition & Neural Networks Software www.envirocoustics.gr, info@envirocoustics.gr www.pacndt.com, sales@pacndt.com FRP Blade Data Analysis

More information