Frequency damage indicators for piezoelectric composites
|
|
- Emery Walton
- 5 years ago
- Views:
Transcription
1 Frequency damage indicators or piezoelectric composites *Ayech Benjeddou ), Mohsen Hamdi ) and Samir Ghanmi ) ) Structures, SUPMECA, Saint Ouen 900, France ) benjeddou@supmeca.r,) Technology department, IPEIN, Nabeul 8000, Tunisia ABSTRACT The present contribution ocuses on vibration-based damage detection o laminated composite beams using integrated piezoceramic patches and requency indicators. The latter are assessed via three-dimensional ully coupled piezoelectric inite element parametric analyses on the damage key parameters under dierent mechanical and electrical conditions, and or all types o vibration modes. It is ound that squared requency change actors perormances are much better, as damage indicators, than simple requency change ones; moreover, open-circuit requency based damage indicators perormances are ound to be similar to short-circuit ones. The obtained results can be urther used, or example, or training artiicial neural networks or the quantiication o the analyzed damage types (crack and delamination).. INTRODUCTION Vibration-based damage detection (VBDD) or structural health monitoring (SHM) is a well-established technique or passive (Sinou 009) and active (Huang et al. 00) structures. However, except ew works (Jian et al. 997, Penn et al. 999, Tan and Tong 00, Yam et al. 00, Benjeddou 006, Benjeddou et al. 006, Qiao et al. 007, Al-Ajmi and Benjeddou 008), the use o piezoceramic transducers as sensors or/and actuators was mainly limited to Lamb waves (see or example Ihn et al. 008)- and impedance (see or example Giurgiutiu et al. 0) based high requency approaches. It is then the objective o the present contribution to ocus on low-requency VBDD or piezoelectric laminated composite beams. Hence, requency damage indicators, other than the classical simple requency change (Tan and Tong 00), are here explored via parametric analyses on the damage key parameters (position, length, depth) and on various mechanical (clamped-ree, CF; clamped supported, CS; clamped-clamped, CC; supported supported, SS) and electrical (short circuit, SC; open circuit, OC) ) Full Proessor ) PhD Student ) Assistant Proessor 050
2 conditions. For this purpose, three-dimensional (D) piezoelectric ully coupled inite element (FE) analyses are used or assessing the eects o these parameters and conditions on the proposed VBDD indicators perormance or all types o vibration modes (bending, membrane and torsion). The damage is modeled as a removal o material (RM), simulating a crack (Qiao et al. 007), and as inclusion o a sot layer (ISL) o Telon material, simulating a delamination (Yam et al. 00). The added values o the present work to the authors earlier ones and to the current state o the art o VBDD o composite structures with piezoelectric patches are: (i) use o D ully coupled piezoelectric FE models instead o one-dimensional (D) models that do not model explicitly the beam width; (ii) considering all mode types (bending, membrane and torsion) instead o transverse bending ones only as previously retained; (iii) considering most mechanical boundary conditions (BC) and not only the popular CF or SS ones; (iv) investigation o a new OC requency-based damage indicator; Hence, hereater, requency damage indicators are irst discussed; then, simple and squared requency-change actor (FCF) indicators are analyzed irst under ixed RM and ISL damage characteristics; next, they are assessed through FE parametric analyses under RM and ISL varied damage characteristics o hybrid carbon/graphite iber reinorced polymer (CFRP/GFRP) composite laminated beams with symmetrically integrated pair o piezoceramic (PZT-5A) patches under our (CF, CS, CC, SS) mechanical and two (SC, OC) electrical conditions. Finally, conclusions and perspectives are given as a closure.. FREQUENCY-BASED DAMAGE INDICATORS A qualitative way to track damage presence in a structure is to compare tabulated damage requencies ( d ) to healthy ones ( h ) o the vibrating structure as considered in Penn et al. (999) or controlled delaminated (created by placing inter-ply Telon polyimide release ilm pieces) unidirectional (UD) GFRP cantilever plates using piezoelectric polymer (PVDF) sensors. A quantitative detection was considered earlier, in Jian et al. (997), through graphical representations, versus mode number, o this requencies ratio (FR) indicator FR d () h It s worthy to notice that in these experimental analyses (Jian et al. 997, Penn et al. 999) no indication was given on the electric conditions (SC or OC) applied to the electrodes o piezoelectric sensors bonded to the vibrating composite plates. Later, in Tan and Tong (00), the ollowing percent requencies change (FC) was used or delamination detection o composite beams using piezoceramic (PZT) sensors FC d h d (%) ( ) () h h Here (Tan and Tong 00) also, no indication was given on the electric conditions applied to the electrodes strips made on the piezoelectric sensors suraces. 05
3 First consideration o the electric conditions applied on the electrodes o the piezoelectric actuators or sensors was proposed by Benjeddou et al. (006), or piezoelectric hybrid CFRP/GFRP laminated composite cantilever beams, through this percent requency change actor (FCF) that uses damaged and healthy requencies under SC patches electrodes FCF sc ( sc ) h ( sc ) d (%) ( FRsc) () ( ) sc h Notice in eq. () the opposite sign to Eq. (); it is motivated by the act that the damage generally reduces the requencies (Yam et al., 00); hence this deinition is expected to provide mostly positive values o the damage presence indicator. A new OC FCF damage indicator is here proposed in order to investigate the piezoelectric eect (present under OC conditions) inluence on the simple FCF FCF oc ( oc ) h ( oc ) d (%) ( FRoc ) () ( ) oc h This indicator is to be compared to above SC FCF one, as given in Eq. (), that inherently does not show the piezoelectric eect. Later, in Al-Ajmi and Benjeddou (008), new indicators using squared requencies under SC and OC patches electrodes were proposed as ollows, respectively FCF FCF ( sc ) h ( sc ) d sc FR sc ( sc ) h (%) ( ) (5) ( oc ) h ( oc ) d oc FR oc ( oc ) h (%) ( ) (6) The last our VBDD indicators, as deined in Eq. () Eq. (6), will be assessed on the same piezoelectric hybrid laminated composite beam benchmark, but under various mechanical and electrical BC. Also, all mode types will be considered thanks to the use o a D ully coupled piezoelectric FE model with the help o ANSYS commercial code.. DAMAGE INFLUENCE ON MODAL PROPERTIES AND INDICATORS The benchmark used or the assessment o above requency-based damage indicators is that proposed in Benjeddou et al. (006); it consists o a -ply symmetric laminated composite beam with dimensions L B H = 00 0 mm and symmetric stacking sequence o [0 /90 8 /0 ] S, where bold plies are made o GFRP, while the others are in CFRP. Two piezoceramic (PZT-5A) patches, polarized along their thickness and o dimensions L a B H a = mm, are placed in replacement o bottom and top our 90 -plies at the length position o X a =.5 mm rom the beam let end. The sketched geometrical model shown in Fig. is meshed using D quadratic (0 nodes) elastic (displacement) SOLID9 and ully coupled piezoelectric SOLID6 05
4 (displacement-potential) FE or composite and piezoelectric layers, respectively, according to the subdivisions summarized in Table ; this leads to a FE mesh o 80 elements and 879 nodes. Materials data are given in Appendix A. The geometric and FE model are shown in Fig.. z H x L L a L X a Fig. Smart hybrid laminated beam sketch (red: PZT-5A, green: GFRP, gray: CFRP) Table D FE discretization o the smart hybrid healthy laminate composite beam Healthy beam Geometric parameter Dimension (mm) Number o elements Size o elements (mm) Host composite L 0.5 L a L B H PZT L a B a Hp Fig. Smart hybrid laminated composite beam (a) geometric and (b) FE D models Two types o damages are considered; the irst simulates a notch or crack, and is modeled by the removal o corresponding material, while the second simulates a 05
5 delamination and is modeled by an inclusion o a sot layer made o a thin Telon ilm. The corresponding geometrical sketches are shown in Fig., while their FE mesh details are provided in Table, leading to elements and 77 nodes or the RM model, and 80 elements and 879 nodes or the ISL one; they are shown in Fig.. Ld z Hd H x X L Xa La Xd L L (a) Notched (RM: [X d L d H d ] = [80 5.5] mm) beam Ld z Hd Hd H x L Xa La Xd L L L (b) Delaminated (ISL: [X d L d H d ] = [80 5 ] mm) beam Fig. Damaged hybrid composite beam (red: PZT-5A, green: GFRP, gray: CFRP) Table D FE discretization o the damaged smart hybrid composite beam Damaged beam Geometric parameter Dimension (mm) Number o elements Size o elements (mm) Host composite L 0.5 L a L L B H 0.5, PZT L a B a Hp Notched (RM) damage Delamination (ISL) damage L d 5.5 B d H d L d 5.5 B d H d
6 (a) RM D geometric model (b) RM D FE model (c) ISL D geometric model (d) ISL D FE model Fig. Damaged hybrid composite beam (a,c) geometric and (b,d) FE D models The FE simulations have been conducted or the healthy and damage (RM and ISL) smart hybrid laminated composite beam under our mechanical BC (CF, CS, CC, SS) and two electric conditions (SC, OC). The obtained results are shown in Table, where bold values indicate electromechanically uncoupled modes since there is no dierence between SC and OC values (tenth or hundredth Hz dierences are only numerical). Worthy to mention that clamping is obtained by ixing the FE three displacements (translations) degrees o reedom (DOF) to zero values, while simply-supported condition is modeled here by letting ree only the axial displacement (translation) DOF. From the results, it can be observed that (i) only the RM damage changes the modes types or only the CF BC; (ii) the modes electromechanical coupling is not aected by the damage since the healthy uncoupled x-y in-plane bending and torsion modes remain uncoupled or the damaged (RM and ISL) beams; hence, only the transverse () bending modes are coupled and aected by the damage; (iii) in contrary to the RM damage model, the ISL one does not aect the mode order and type; care should be then taken when using RM model or the damage simulation under CF BC since it aects the modes types and order (see modes,, 7, 8 o this case); (iv) the CS, CC and SS BC have dierent modes types than the CF one; besides, the SS BC case has dierent rd and th modes types than CS and CC BC which have the same modes types; hence, it appears clearly that the popular numerical CF and analytical SS BC are not the best ones or studying theoretically (numerically or analytically) the VBDD perormance in D modeling which is the realistic way o simulating actual damaged structures which have intrinsically a D response; the best BC rom this point o view are then CS and CC, with a preerence to the latter due to its practical interest. 055
7 Table First 8 requencies (Hz) o healthy and damaged smart hybrid composite beams Mode Healthy requencies (Hz) RM requencies (Hz) ISL requencies (Hz) BC order Type SC OC Type SC OC Type SC OC CF xy xy t t xy CS t xy t xy t t xy t xy t t t CC t xy t t SS xy t t xy t t xy t t t t t t t xy t xy t t t xy t t xy t t t Processing SC and OC requency results o Table provides SC and OC FCF (Eqs. and ) and squared FCF (Eqs. 5 and 6) ones given in Table. The latter indicates or FCF indicators that: (i) due to the more structural degradation, RM indicators have much higher values than ISL ones, although both o them remain low (less than 5%); (ii) RM indicators are mostly positive, while ISL ones are mostly negative, indicating that in contrary to the RM damage which decreases the healthy requencies (see Eq. ), the ISL damage increases the healthy requencies (Eq. ); (iii) OC and SC indicators 056
8 highest values (in bold) are obtained or transverse bending modes under all BC or RM damage, but or the irst membrane mode or the ISL damage under all BC, except the SS case; (iv) SC and OC FCF maximum values can be dierent or the RM damage model but are the same or the ISL one. Table First 8 modes FCF damage indicators (%) o the smart hybrid composite beams Damage model RM ISL Mode FCF (%) Squared FCF (%) FCF (%) Squared FCF (%) BC type SC OC SC OC SC OC SC OC CF xy t t xy CS t xy t t CC t xy t t SS xy t t t For the squared FCF, it is ound that these indicators are much more perormant (having much higher values) or indicating both RM and ISL damages than the FCF 057
9 ones; they are then retained or the subsequent parametric analyses; thereore, since SC and OC values are ound to be close to each other, ocus is made mainly on SC squared FCF in order to get reerence with earlier D results (Benjeddou et al. 006).. DAMAGE DETECTION INDICATORS PARAMETRIC ASSESMENT In order to check the validity o above obtained results or ixed MR and ISL damage characteristics o [X d L d H d ] = [80 5.5] mm and [80 5 ] mm, respectively, these parameters are varied according to the values summarized in Table 5. Table 5 Damage characteristics variations or the parametric analysis o damaged smart hybrid composite beams Model parameters X d (mm) L d (mm) H d (mm) case X d /L L d /L H d /H RM ISL 60 (ixed) (ixed) The D simulations are then conducted under the previously investigated our mechanical BC o the damaged hybrid composite beams and two electric conditions on the patches electrodes. It s worth noticing that, or the ISL damage model, the number and thickness o Telon layers vary in terms o the damage geometric characteristics. Due to the space limitation, only the irst mode CF BC related SC squared FCF results, or normalized damages characteristics (X d /L, L d /L, H d /H), are shown or the RM and ISL in Fig. 5. The latter indicates that: (i) or all parametric analysis cases, RM damage is much more inluential on the SC FCF indicator than does the ISL one; (ii) or a ixed damage position (case ), SC FCF indicator increases or both damages when increasing the latters length and height, but more rapidly or the ormer than or the latter; (iii) or ixed damage length (case ) and thickness (case ), SC FCF indicator behaves oppositely or RM and ISL damages when varying the damages positions; it is higher or RM at the beam root, while it is lower or ISL at this position. Maximum reached squared FCF values or both damages models, our BC and two electric conditions are summarized in Table 6. It can be noticed that: (i) RM induced squared FCF is much higher than ISL one; (ii) maximum values are obtained or the CF BC or both damage models but with dierent values and or dierent modes and damages characteristics; SC and OC squared FCF reach the same maximum values and or the same modes, except or ISL under CF. 058
10 Case Case Case Fig. 5 SC squared FCF parametric analysis or mode o CF hybrid composite beams Table 6 Damage characteristics o maximum reached squared FCF indicators Damage Indicator Characteristics CF CS CC SS RM SC [X d, L d, H d ] [0 0.5] [00 0.5] [00 0.5] [00 0.5] (%, mode) (.0; 6) (9.08; 6) (0.6; 6) (0.07; 6) OC [X d, L d, H d ] [0 0.5] [00 0.5] [00 0.5] [00 0.5] (%, mode) (.0; 6) (9.08; 6) (0.6; 6) (0.07; 6) ISL SC [X d, L d, H d ] [60 0 ] [0 0 ] [00 0 ] [00 0 ] (%, mode) (-7.0; ) (-6.6; ) (-6.58; ) (-5.8; ) OC [X d, L d, H d ] [60 0 ] [0 0 ] [00 0 ] [00 0 ] (%, mode) (-6.5; ) (-6.7; ) (-6.58; ) (-5.8; ) 059
11 . CONCLUSIONS This contribution presented short-circuit (SC) and open-circuit (OC) simple and squared requency change actors (FCF) or the damage detection in hybrid laminated composite beams using piezoceramic patches integrated in a symmetrical coniguration. The structural damage was modeled using removal o material (RM), simulating a notch or crack, and inclusion o sot layer (ISL), simulation a delamination The proposed damage indicators perormance analysis was investigated using three-dimensional ully coupled piezoelectric inite elements (FE) under our mechanical boundary conditions and or varying damage geometric characteristics (position, length and height). It was ound that the squared FCF are much more perormant than the classical simple ones; also, both damage indicators were ound to be much more inluenced by varying the RM model characteristics than the ISL ones; besides, it was shown that the popular numerical cantilever and analytical simple support boundary conditions (BC) are not suitable or investigating theoretically requency-based RM damage detection since in these cases, changes o modes order and type occur, rendering the obtained results speciic and not generalizable to other BC; it is then recommended or numerical analysis, to preer clamped-clamped BC or these and or practical reasons. As an extension o the present work, modal energy-based damage indicators have been explored; or space limitation, corresponding results will be presented separately. ACKNOWLEDGMENTS Support o the irst author rom the Comet-K Austrian Centre o Competence in Mechatronics (ACCM) at Linz (Austria) is grateully acknowledged. REFERENCES Al-Ajmi, M.A. and Benjeddou, A. (008), Damage indication in smart structures using modal eective electromechanical coupling coeicients. Smart Mater. Struct., 7(), art. n 050 (5 pages). Benjeddou, A. (006), First use o the shear piezoceramics and eective electromechanical coupling coeicient or damage detection and characterization, Proceedings o rd European Workshop on Structural Health Monitoring, Granada. Benjeddou, A., Vijayakumar, S. and Tawiq, I. (006), A new damage identiication and quantiication indicator or piezoelectric advanced composites, Proceedings o the rd ECCM on Solids. Structures and Coupled Problems in Engineering, Lisbon. Giurgiutiu, V., Lin, B., Santonni-Bottai, G. and Cuc, A. (0), Space application o piezoelectric waer sensors or structural health monitoring, J. Intell. Mater. Syst. Struct., (8), Huang, G., Song, F. and Wang, X. (00), Quantitative modeling o coupled piezoelasto-dynamic behavior o piezoelectric actuators bonded to an elastic medium or structural health monitoring: a review, Sensors, 0, Ihn, J.B. and Chang, F.K. (008), Pitch-catch active sensing methods in structural health monitoring or aircrat structures, Struct. Health Monit., 7(),
12 Jian, X.H., Tzou, H.S., Lissenden, C.J. and Penn, L.S. (997), Damage detection by piezoelectric patches in a ree vibration method, J. Compos. Mater., (), Penn, L.S., Jump, J.R. and Geenield, M.J. (999), Use o ree vibration spectrum to detect delamination in thick composites, J. Compos. Mater., (), 5-7. Qian. P., Lestari. W., Shah, M.G. and Wang, J. (007), Dynamics-based damage detection o composite laminated beams using contact and non-contact measurement systems, J. Compos. Mater., (0), 7-5. Sinou, J.J. (009), A review o damage detection and health monitoring o mechanical systems rom changes in the measurements o linear and nonlinear vibrations, In Sapri R.C, (Ed.), Mechanical vibrations: measurement, eects and control, Nova Sci. Pub., Chap., Tan, P. and Tong, L. (00), Delamination detection o composite beams using piezoelectric sensors with evenly distributed electrode strips, J. Compos. Mater., 8(), -5. Yam, L.H., Wei, Z. and Cheng, L. (00), Nondestructive detection o internal delamination by vibration-based method or composite plates, J. Compos. Mater., 8(), APPENDIX A Table 7 Materials properties Elastic E (GPa) E (GPa) E (GPa) G (GPa) G (GPa) G (GPa) CFRP (M55J/9) GFRP (G87/9) Telon PZT-5A Piezoelectric e (C/m ) e (C/m ) e (C/m ) e 5 (C/m ) e (C/m ) s s s 0 (pf/m) PZT-5A
Structural Health Monitoring Using Smart Piezoelectric Material
Structural Health Monitoring Using Smart Piezoelectric Material Kevin K Tseng and Liangsheng Wang Department of Civil and Environmental Engineering, Vanderbilt University Nashville, TN 37235, USA Abstract
More informationS. Srinivasan, Technip Offshore, Inc., Houston, TX
9 th ASCE Specialty Conerence on Probabilistic Mechanics and Structural Reliability PROBABILISTIC FAILURE PREDICTION OF FILAMENT-WOUND GLASS-FIBER Abstract REINFORCED COMPOSITE TUBES UNDER BIAXIAL LOADING
More informationHYDROELASTIC TAILORING AND OPTIMIZATION OF A COMPOSITE MARINE PROPELLER
HYDROELASTIC TAILORING AND OPTIMIZATION OF A COMPOSITE MARINE PROPELLER José P. Blasques, Christian Berggreen and Poul Andersen Department o Mechanical Engineering, Technical University o Denmark Nils
More informationModeling and analysis of the electromechanical behavior of surface-bonded piezoelectric actuators using finite element method
Modeling and analysis of the electromechanical behavior of surface-bonded piezoelectric actuators using finite element method Huangchao Yu and Xiaodong Wang Abstract Piezoelectric actuators have been widely
More informationBond strength model for interfaces between nearsurface mounted (NSM) CFRP strips and concrete
University o Wollongong Research Online Faculty o Engineering and Inormation Sciences - Papers: Part A Faculty o Engineering and Inormation Sciences 2014 Bond strength model or interaces between nearsurace
More informationAnalysis of Friction-Induced Vibration Leading to Eek Noise in a Dry Friction Clutch. Abstract
The 22 International Congress and Exposition on Noise Control Engineering Dearborn, MI, USA. August 19-21, 22 Analysis o Friction-Induced Vibration Leading to Eek Noise in a Dry Friction Clutch P. Wickramarachi
More informationHEALTH MONITORING OF PLATE STRUCTURE USING PIEZO ELECTRIC PATCHES AND CURVATURE MODE SHAPE
ISSN (Online) : 2319-8753 ISSN (Print) : 2347-6710 International Journal of Innovative Research in Science, Engineering and Technology An ISO 3297: 2007 Certified Organization, Volume 2, Special Issue
More informationSOME RESEARCH ON FINITE ELEMENT ANALYSIS OF COMPOSITE MATERIALS
The 3 rd International Conerence on DIAGNOSIS AND PREDICTION IN MECHANICAL ENGINEERING SYSTEMS DIPRE 12 SOME RESEARCH ON FINITE ELEMENT ANALYSIS OF Valeriu DULGHERU, Viorel BOSTAN, Marin GUŢU Technical
More informationFATIGUE DURABILITY OF CONCRETE EXTERNALLY STRENGTHENED WITH FRP SHEETS
FATIGUE DURABILITY OF CONCRETE EXTERNALLY STRENGTHENED WITH FRP SHEETS H. Diab () and Zhishen Wu () () Department o Urban and Civil Engineering, Ibaraki University, Japan Abstract A primary concern o the
More informationAXIALLY LOADED FRP CONFINED REINFORCED CONCRETE CROSS-SECTIONS
AXIALLY LOADED FRP CONFINED REINFORCED CONCRETE CROSS-SECTIONS Bernát Csuka Budapest University o Technology and Economics Department o Mechanics Materials and Structures Supervisor: László P. Kollár 1.
More informationON AN ESTIMATION OF THE DAMPING PROPERTIES OF WOVEN FABRIC COMPOSITES
ON AN ESTIMATION OF THE DAMPING PROPERTIES OF WOVEN FABRIC COMPOSITES Masaru Zao 1, Tetsusei Kurashii 1, Yasumasa Naanishi 2 and Kin ya Matsumoto 2 1 Department o Management o Industry and Technology,
More informationSupporting Information for: Flexible Energy Conversion
Supporting Inormation or: Piezoelectric Nanoribbons Printed onto Rubber or Flexible Energy Conversion Yi Qi, Noah T. Jaeris, Kenneth Lyons, Jr., Christine M. Lee, Habib Ahmad, Michael C. McAlpine *, Department
More informationOBSERVER/KALMAN AND SUBSPACE IDENTIFICATION OF THE UBC BENCHMARK STRUCTURAL MODEL
OBSERVER/KALMAN AND SUBSPACE IDENTIFICATION OF THE UBC BENCHMARK STRUCTURAL MODEL Dionisio Bernal, Burcu Gunes Associate Proessor, Graduate Student Department o Civil and Environmental Engineering, 7 Snell
More informationFinite Element Modeling of Residual Thermal Stresses in Fiber-Reinforced Composites Using Different Representative Volume Elements
Proceedings o the World Congress on Engineering 21 Vol II WCE 21, June 3 - July 2, 21, London, U.K. Finite Element Modeling o Residual Thermal Stresses in Fiber-Reinorced Composites Using Dierent Representative
More informationDELAMINATION CONTROL IN COMPOSITE BEAMS USING PIEZOELECTRIC ACTUATORS
DELAMINATION CONTROL IN COMPOSITE BEAMS USING PIEZOELECTRIC ACTUATORS L Iannucci 1, M S I Shaik Dawood 1,2,3, E Greenhalgh 1 and A K Ariffin 3 1 Aeronautics Department, Imperial College London, South Kensington
More informationReliability assessment on maximum crack width of GFRPreinforced
Fourth International Conerence on FRP Composites in Civil Engineering (CICE2008) 22-24July 2008, Zurich, Switzerland Reliability assessment on maximum crack width o GFRPreinorced concrete beams Z. He and
More informationME 328 Machine Design Vibration handout (vibrations is not covered in text)
ME 38 Machine Design Vibration handout (vibrations is not covered in text) The ollowing are two good textbooks or vibrations (any edition). There are numerous other texts o equal quality. M. L. James,
More informationCHAPTER 8 ANALYSIS OF AVERAGE SQUARED DIFFERENCE SURFACES
CAPTER 8 ANALYSS O AVERAGE SQUARED DERENCE SURACES n Chapters 5, 6, and 7, the Spectral it algorithm was used to estimate both scatterer size and total attenuation rom the backscattered waveorms by minimizing
More informationElectromechanical Impedance Technique and Scanning Vibrometry for Structure Characterization
6th European Workshop on Structural Health Monitoring - Tu.2.C.4 Electromechanical Impedance Technique and Scanning Vibrometry for Structure Characterization L. SKARBEK, T. WANDOWSKI, S. OPOKA, P. MALINOWSKI
More informationX-ray Diffraction. Interaction of Waves Reciprocal Lattice and Diffraction X-ray Scattering by Atoms The Integrated Intensity
X-ray Diraction Interaction o Waves Reciprocal Lattice and Diraction X-ray Scattering by Atoms The Integrated Intensity Basic Principles o Interaction o Waves Periodic waves characteristic: Frequency :
More informationCOUPLED FIELD ANALYSIS OF PIEZOELECTRIC CANTILEVER BEAM
COUPLED FIELD ANALYSIS OF PIEZOELECTRIC CANTILEVER BEAM Kunal Ganpati Rajdeep Department Of Mechanical Engineering, Solapur University / Fabtech Technical Campus & Research, Sangola, India ABSTRACT Electromechanical
More informationINTRODUCTION TO PIEZO TRANSDUCERS
PIEZO SYSTEMS, INC. 65 Tower Office Park Woburn, MA 01801 USA Tel: 781 933 4850 Fax: 781 933 4743 email: sales@piezo.com Find Search for a product or category HOME PRODUCTS CUSTOM OEM CATALOG TECHNICAL
More informationMICROMECHANICAL FAILURE ANALYSIS OF UNIDIRECTIONAL FIBER-REINFORCED COMPOSITES UNDER IN-PLANE AND TRANSVERSE SHEAR
THE 19 TH INTERNATIONAL CONFERENCE ON COMPOSITE MATERIALS MICROMECHANICAL FAILURE ANALYSIS OF UNIDIRECTIONAL FIBER-REINFORCED COMPOSITES UNDER IN-PLANE AND TRANSVERSE SHEAR Lei Yang*, Ying Yan, Zhiguo
More informationFinite Element Analysis of Piezoelectric Cantilever
Finite Element Analysis of Piezoelectric Cantilever Nitin N More Department of Mechanical Engineering K.L.E S College of Engineering and Technology, Belgaum, Karnataka, India. Abstract- Energy (or power)
More informationComposite Structures- Modeling, FEA, Optimization and Diagnostics
Composite Structures- Modeling, FEA, Optimization and Diagnostics Ratan Jha Mechanical and Aeronautical Engineering Clarkson University, Potsdam, NY Composite Laminate Modeling Refined Higher Order Displacement
More informationFINITE ELEMENT MODELLING OF COMPOSITES USING PIEZOELECTRIC MATERIAL
International Journal of Engineering Research and General Science Volume 3, Issue 4, July-August, 2015 FINITE ELEMENT MODELLING OF COMPOSITES USING PIEZOELECTRIC MATERIAL K.TEJASWINI, tejaswinikota11@gmail.com.,
More informationMCE603: Interfacing and Control of Mechatronic Systems
MCE603: Interfacing and Control of Mechatronic Systems Chapter 7: Actuators and Sensors Topic 7d: Piezoelectric Actuators. Reference: Various articles. Cleveland State University Mechanical Engineering
More informationFracture Behaviour of FRP Cross-Ply Laminate With Embedded Delamination Subjected To Transverse Load
Fracture Behaviour of FRP Cross-Ply Laminate With Embedded Delamination Subjected To Transverse Load Sriram Chintapalli 1, S.Srilakshmi 1 1 Dept. of Mech. Engg., P. V. P. Siddhartha Institute of Technology.
More informationHigh-performance machining of fiber-reinforced materials with hybrid ultrasonic-assisted cutting
, pp. 79 88 Special issue: 3rd International MERGE Technologies Conference (IMTC), 21st 22nd September 2017, Chemnitz High-performance machining of fiber-reinforced materials with hybrid ultrasonic-assisted
More informationElectromechanical Finite Element Modeling of Unstiffened Smart Steel Shear Walls (SSSWs)
Electromechanical Finite Element Modeling of Unstiffened Smart Steel Shear Walls (SSSWs) Y. Shahbazi 1, M. Eghbalian 2, M.R. Chenaghlou 3, K.Abedi 4 1- PhD Student of structural Engineering, Sahand University
More informationVIBRATION CONTROL OF RECTANGULAR CROSS-PLY FRP PLATES USING PZT MATERIALS
Journal of Engineering Science and Technology Vol. 12, No. 12 (217) 3398-3411 School of Engineering, Taylor s University VIBRATION CONTROL OF RECTANGULAR CROSS-PLY FRP PLATES USING PZT MATERIALS DILEEP
More informationAnalysis of Foundation Damping from Theoretical Models and Forced Vibration Testing
6 th International Conerence on Earthquae Geotechnical Engineering 1-4 November 2015 Christchurch, New Zealand Analysis o Foundation Damping rom Theoretical Models and Forced Vibration Testing M. J. Givens
More information440. Simulation and implementation of a piezoelectric sensor for harmonic in-situ strain monitoring
440. Simulation and implementation of a piezoelectric sensor for harmonic in-situ strain monitoring 0. Incandela a, L. Goujon b, C. Barthod c University of Savoie, BP 80439 Annecy-le-Vieux CEDEX, France
More informationVibration Modelling of Composite Laminates with Delamination Damage
Proceedings of 20 th International Congress on Acoustics, ICA 2010 23-27 August 2010, Sydney, Australia Vibration Modelling of Composite Laminates with Delamination Damage Z. Zhang, K. Shankar, M. Tahtali
More informationDesign of smart lightweight structures: Simultaneous optimization of mechanical and shunt circuit parameters
ICAST2014 #008 Design of smart lightweight structures: Simultaneous optimization of mechanical and shunt circuit parameters Rogério Salloum 1*, Oliver Heuss 1, Dirk Mayer 1 1 Fraunhofer Institute for Structural
More informationNUMERICAL 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 informationActive Structural Health Monitoring of Reinforced Concrete Structures using Piezoelectric Smart Aggregates
Active Structural Health Monitoring of Reinforced Concrete Structures using Piezoelectric Smart Aggregates More info about this article: http://www.ndt.net/?id=0005 1 Tamara NESTOROVIĆ 1, Dragoslav STOJIĆ,
More informationPiezoelectric Control of Multi-functional Composite Shells Subjected to an Electromagnetic Field
Piezoelectric Control of Multi-functional Composite Shells Subjected to an Electromagnetic Field *Sang-Yun Park 1) and Ohseop Song 2) 1), 2) Department of Mechanical Engineering, Chungnam National University,
More informationPassive Damping Characteristics of Carbon Epoxy Composite Plates
Journal of Materials Science and Engineering A 6 (-) 35-4 doi:.765/6-63/6.-.5 D DAVID PUBLISHING Passive Damping Characteristics of Carbon Epoxy Composite Plates Dileep Kumar K * and V V Subba Rao Faculty
More informationFinite Element Analysis of the Local Effect of a Piezoelectric Patch on an Aluminum Plate
Mechanics and Mechanical Engineering Vol. 21, No. 2 (2017) 233 242 c Lodz University of Technology Finite Element Analysis of the Local Effect of a Piezoelectric Patch on an Aluminum Plate Aziz Lebied
More informationAH 2700A. Attenuator Pair Ratio for C vs Frequency. Option-E 50 Hz-20 khz Ultra-precision Capacitance/Loss Bridge
0 E ttenuator Pair Ratio or vs requency NEEN-ERLN 700 Option-E 0-0 k Ultra-precision apacitance/loss ridge ttenuator Ratio Pair Uncertainty o in ppm or ll Usable Pairs o Taps 0 0 0. 0. 0. 07/08/0 E E E
More informationSHM for RC Structure Using PZT Rebar Active Sensing System - Numerical Study
SHM for RC Structure Using PZT Rebar Active Sensing System - Numerical Study Fan Wu, Wanjun Li, Juan Yi To cite this version: Fan Wu, Wanjun Li, Juan Yi. SHM for RC Structure Using PZT Rebar Active Sensing
More informationComputational 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 informationThermal deformation compensation of a composite beam using piezoelectric actuators
INSTITUTE OF PHYSICS PUBLISHING Smart Mater. Struct. 13 (24) 3 37 SMART MATERIALS AND STRUCTURES PII: S964-1726(4)7973-8 Thermal deformation compensation of a composite beam using piezoelectric actuators
More informationStudy of full band gaps and propagation of acoustic waves in two-dimensional piezoelectric phononic plates
Study o ull band gaps and propagation o acoustic waves in two-dimensional pieoelectric phononic plates J.-C. Hsu and T.-T. Wu Institute o Applied Mechanics, National Taiwan University, No. 1, Sec. 4, Roosevelt
More informationPost-earthquake Damage Detection Using Embedded Electro-mechanical Impedance Sensors for Concrete Dams
Post-earthquake Damage Detection Using Embedded Electro-mechanical Impedance Sensors for Concrete Dams X. Feng, E.T. Dandjekpo & J. Zhou Faculty of Infrastructure, Dalian University of Technology, China
More informationAn Efficient Coupled Polynomial Interpolation Scheme to Eliminate Material-locking in the Euler-Bernoulli Piezoelectric Beam Finite Element
153 An Efficient Coupled Polynomial Interpolation Scheme to Eliminate Material-locking in the Euler-Bernoulli Piezoelectric Beam Finite Element Abstract The convergence characteristic of the conventional
More informationCONVECTIVE HEAT TRANSFER CHARACTERISTICS OF NANOFLUIDS. Convective heat transfer analysis of nanofluid flowing inside a
Chapter 4 CONVECTIVE HEAT TRANSFER CHARACTERISTICS OF NANOFLUIDS Convective heat transer analysis o nanoluid lowing inside a straight tube o circular cross-section under laminar and turbulent conditions
More informationPIEZOCERAMICS UNDER ELECTRON IRRADIATION
U.P.B. Sci. Bull., Series A, Vol. 72, Iss. 2, 2010 ISSN 1223-7027 PIEZOCERAMICS UNDER ELECTRON IRRADIATION Irinela CHILIBON 1 Lucrarea prezintă aspecte privind comportarea piezoceramicelor PZT la iradiere
More informationM. Eissa * and M. Sayed Department of Engineering Mathematics, Faculty of Electronic Engineering Menouf 32952, Egypt. *
Mathematical and Computational Applications, Vol., No., pp. 5-6, 006. Association or Scientiic Research A COMPARISON BETWEEN ACTIVE AND PASSIVE VIBRATION CONTROL OF NON-LINEAR SIMPLE PENDULUM PART II:
More informationDesign Guidelines A Scandinavian Approach
Design Guidelines A Scandinavian Approach Pro. Björn Täljsten Luleå University o Technology SWEDEN Presented by Tech. Lic Anders Carolin 1 Pro. B. Täljsten Departmento Civiland Mining Engineering Division
More informationReliability of Axially Loaded Fiber-Reinforced-Polymer Confined Reinforced Concrete Circular Columns
American J. o Engineering and Applied Sciences (1): 31-38, 009 ISSN 1941-700 009 Science Publications Reliability o Axially Loaded Fiber-Reinorced-Polymer Conined Reinorced Concrete Circular Columns Venkatarman
More informationFirst-principles calculation of defect free energies: General aspects illustrated in the case of bcc-fe. D. Murali, M. Posselt *, and M.
irst-principles calculation o deect ree energies: General aspects illustrated in the case o bcc-e D. Murali, M. Posselt *, and M. Schiwarth Helmholtz-Zentrum Dresden - Rossendor, Institute o Ion Beam Physics
More informationVIBRATION CONTROL SIMULATION OF LAMINATED COMPOSITE PLATES WITH INTEGRATED PIEZOELECTRICS
Journal of Sound and Vibration (999) 22(5), 827 846 Article No. jsvi.998.97, available online at http://www.idealibrary.com.on VIBRATION CONTROL SIMULATION OF LAMINATED COMPOSITE PLATES WITH INTEGRATED
More informationLife Prediction Under Multiaxial Fatigue
Lie Prediction Under Multiaxial Fatigue D. Ramesh and M.M. Mayuram Department o Mechanical Engineering Indian Institute o Technology, Madras Chennai-600 036 (India) e-mail: mayuram@iitm.ac.in ABSTRACT
More informationManufacturing Remaining Stresses in Truck Frame Rail's Fatigue Life Prediction
Manuacturing Remaining Stresses in Truck Frame Rail's Fatigue Lie Prediction Claudiomar C. Cunha & Carlos A. N. Dias MSX International & Department o Naval Engineering EPUSP/USP/Brazil Department o Mechanical
More informationA Systematic Approach to Frequency Compensation of the Voltage Loop in Boost PFC Pre- regulators.
A Systematic Approach to Frequency Compensation o the Voltage Loop in oost PFC Pre- regulators. Claudio Adragna, STMicroelectronics, Italy Abstract Venable s -actor method is a systematic procedure that
More informationSize Effect on Strength of Bimaterial Joints: Computational Approach versus Analysis and Experiment
Proc. (CD), 12th Intern. Con. on Fracture (ICF-12) (held in Ottawa, Canada, July 2009), Robert Bell, ed., Carleton University, pp. 1 10. Size Eect on Strength o Bimaterial Joints: Computational Approach
More informationUNCERTAINTY EVALUATION OF SINUSOIDAL FORCE MEASUREMENT
XXI IMEKO World Congress Measurement in Research and Industry August 30 eptember 4, 05, Prague, Czech Republic UNCERTAINTY EVALUATION OF INUOIDAL FORCE MEAUREMENT Christian chlegel, Gabriela Kiekenap,Rol
More informationRecent Research on Damage Detection Methods for Helicopter Rotor Systems
Recent Research on Damage Detection Methods for Helicopter Rotor Systems Prof. Ed Smith, Prof. Stephen Conlon, Aerospace Engineering Dept Prof. Kon-Well Wang Mechanical Engineering Dept Prof. Joe Rose,
More informationOptimizing the Design of Polymer Based Unimorph Actuator using COMSOL Multiphysics Vineet Tiwari, Rashiya Sharma, R. K. Dwivedi and Geetika Srivastava
Optimizing the Design of Polymer Based Unimorph Actuator using COMSOL Multiphysics Vineet Tiwari, Rashiya Sharma, R. K. Dwivedi and Geetika Srivastava Department of Physics and Materials Science & Engineering
More informationPredictive modeling of electromechanical impedance spectroscopy for composite materials
Article Predictive modeling of electromechanical impedance spectroscopy for composite materials Structural Health Monitoring 0(0) 1 13 Ó The Author(s) 2012 Reprints and permissions: sagepub.co.uk/journalspermissions.nav
More informationEffects 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 informationFinite 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 informationSCIENCE CHINA Physics, Mechanics & Astronomy
SCIENCE CHINA Physics, Mechanics & Astronomy Article June 014 Vol.57 No.6: 1068 1077 doi: 10.1007/s11433-014-5435-z Wave dispersion and attenuation in viscoelastic isotropic media containing multiphase
More informationCalibration of Bond Coefficient for Deflection Control of FRP RC Members
Fourth International Conerence on FRP Composites in Civil Engineering (CICE008) -4July 008, Zurich, Switzerland Calibration o Bond Coeicient or Delection Control o FRP RC Members R. Fico, A. Prota & G.
More informationRELIABILITY OF BURIED PIPELINES WITH CORROSION DEFECTS UNDER VARYING BOUNDARY CONDITIONS
REIABIITY OF BURIE PIPEIES WITH CORROSIO EFECTS UER VARYIG BOUARY COITIOS Ouk-Sub ee 1 and ong-hyeok Kim 1. School o Mechanical Engineering, InHa University #53, Yonghyun-ong, am-ku, Incheon, 40-751, Korea
More informationACTIVE VIBRATION CONTROL PROTOTYPING IN ANSYS: A VERIFICATION EXPERIMENT
ACTIVE VIBRATION CONTROL PROTOTYPING IN ANSYS: A VERIFICATION EXPERIMENT Ing. Gergely TAKÁCS, PhD.* * Institute of Automation, Measurement and Applied Informatics Faculty of Mechanical Engineering Slovak
More informationThe achievable limits of operational modal analysis. * Siu-Kui Au 1)
The achievable limits o operational modal analysis * Siu-Kui Au 1) 1) Center or Engineering Dynamics and Institute or Risk and Uncertainty, University o Liverpool, Liverpool L69 3GH, United Kingdom 1)
More informationVibration Based Damage Identification in a Composite T-Beam Utilising Low Cost Integrated Actuators and Sensors
6th European Workshop on Structural Health Monitoring - Tu.3.C.3 More info about this article: http://www.ndt.net/?id=48 Vibration Based Damage Identification in a Composite T-Beam Utilising Low Cost Integrated
More informationDesign criteria for Fiber Reinforced Rubber Bearings
Design criteria or Fiber Reinorced Rubber Bearings J. M. Kelly Earthquake Engineering Research Center University o Caliornia, Berkeley A. Calabrese & G. Serino Department o Structural Engineering University
More informationModeling and Active Control of a Deformed Smart. Structure Using Piezoelectric Elements
Adv. Theor. Appl. Mech., Vol. 6, 2013, no. 2, 85-94 HIKARI Ltd, www.m-hikari.com http://dx.doi.org/10.12988/atam.2013.3920 Modeling and Active Control of a Deformed Smart Structure Using Piezoelectric
More informationsensors ISSN
Sensors 1, 1, 744-756; doi:1.339/s17744 OPEN ACCESS sensors ISSN 144-8 www.mdpi.com/journal/sensors Article Investigation o the Frequency Shit o a SAD Circuit Loop and the Internal Micro-Cantilever in
More informationAcoustic forcing of flexural waves and acoustic fields for a thin plate in a fluid
Acoustic orcing o leural waves and acoustic ields or a thin plate in a luid Darryl MCMAHON Maritime Division, Deence Science and Technology Organisation, HMAS Stirling, WA Australia ABSTACT Consistency
More informationRepair of Notched Cantilever Beam by Piezoelectric Material
IJRMET Vo l. 5, Is s u e 2, Ma y - Oc t 2015 ISSN : 2249-5762 (Online) ISSN : 2249-5770 (Print) Repair of Notched Cantilever Beam by Piezoelectric Material 1 K.Mahesh Babu, 2 Dr. K.Sivaji Babu, 3 U. Koteswara
More informationFinite Element Simulation of Piezoelectric Wafer Active Sensors for Structural Health Monitoring with Coupled-Filed Elements
Finite Element Simulation of Piezoelectric Wafer Active Sensors for Structural Health Monitoring with Coupled-Filed Elements Weiping Liu, Victor Giurgiutiu Department of Mechanical Engineering, Univ. of
More informationDamage Detection in Cantilever Beams using Vibration Based Methods
More info about this article: http://www.ndt.net/?id=21240 Damage Detection in Cantilever Beams using Vibration Based Methods Santosh J. Chauhan, Nitesh P Yelve, Veda P. Palwankar Department of Mechanical
More informationAvailable online at ScienceDirect. Physics Procedia 63 (2015 ) 54 60
Available online at www.sciencedirect.com ScienceDirect Physics Procedia 63 (2015 ) 54 60 43 rd Annual Symposium of the Ultrasonic Industry Association, UIA Symposium 2014 Phase velocity method for guided
More informationTHE USE OF AUXETIC MATERIALS IN SMART STRUCTURES
COMPUTATIONAL METHODS IN SCIENCE AND TECHNOLOGY 10(2), 147-160 (2004) THE USE OF AUXETIC MATERIALS IN SMART STRUCTURES E. P. HADJIGEORGIOU 1 AND G. E. STAVROULAKIS 2,3 * 1 Department of Materials Science
More informationRESOLUTION MSC.362(92) (Adopted on 14 June 2013) REVISED RECOMMENDATION ON A STANDARD METHOD FOR EVALUATING CROSS-FLOODING ARRANGEMENTS
(Adopted on 4 June 203) (Adopted on 4 June 203) ANNEX 8 (Adopted on 4 June 203) MSC 92/26/Add. Annex 8, page THE MARITIME SAFETY COMMITTEE, RECALLING Article 28(b) o the Convention on the International
More informationAuthor manuscript, published in "EWSHM - 7th European Workshop on Structural Health Monitoring (2014)" 7th European Workshop on Structural Health Monitoring July 8-11, 2014. La Cité, Nantes, France CURE
More informationWELDED ALUMINUM ALLOY PLATE GIRDERS SUBJECTED TO SHEAR FORCE
Advanced Steel Construction Vol. 8, No. 1, pp. 71-94 (2012) 71 WELDED ALUMINUM ALLOY PLATE GIRDERS SUBJECTED TO SHEAR FORCE Feng Zhou 1a, 1b, Ben Young 2,* and Hin-Chung Lam 3 1a Department o Building
More informationSENSOR DESIGN FOR PIEZOELECTRIC CANTILEVER BEAM ENERGY HARVESTERS
SENSOR DESIGN FOR PIEZOELECTRIC CANTILEVER BEAM ENERGY HARVESTERS Michael I. Friswell and Sondipon Adhikari School of Engineering Swansea University Singleton Park, Swansea SA2 8PP, UK E-mail: m.i.friswell@swansea.ac.uk;
More informationRobust Residual Selection for Fault Detection
Robust Residual Selection or Fault Detection Hamed Khorasgani*, Daniel E Jung**, Gautam Biswas*, Erik Frisk**, and Mattias Krysander** Abstract A number o residual generation methods have been developed
More informationA STUDY OF 0 -FIBRE MICROBUCKLING IN MULTIDIRECTIONAL COMPOSITE LAMINATES
A STUDY OF -FIBRE MICROBUCKLING IN MULTIDIRECTIONAL COMPOSITE LAMINATES P. Berbinau and C. Soutis Department o Aeronautics, Imperial College o Science, Technology & Medicine Prince Consort Rd, London SW7
More informationGiola S. Bottai 1a, Nikos A. Chrysochoidis b ; Victor Giurgiutiu a ; and Dimitris A. Saravanos b USA. Greece
Analytical and Experimental Evaluation of Piezoelectric Wafer Active Sensors Performances for Lamb Waves based Structural Health Monitoring in Composite Laminates Giola S. Bottai a, ios A. Chrysochoidis
More informationInternational Workshop SMART MATERIALS AND STRUCTURES
Cansmart 9 International Workshop SMART MATERIALS AND STRUCTURES - 3 October 9, Montreal, Quebec, Canada STRAIN-BASED ENERGY HARVESTING FOR STRUCTURAL HEALTH MONITORING Sébastien Debeaux, Patrice Masson
More informationPiezoelectric Vibration Energy Harvesting. Characteristics of Barium Titanate Laminates
Advances in Theoretical and Applied Mechanics, Vol. 9, 2016, no. 1, 43-54 HIKARI Ltd, www.m-hikari.com http://dx.doi.org/10.12988/atam.2016.634 Piezoelectric Vibration Energy Harvesting Characteristics
More informationProfessor, Institute of Engineering Mechanics, Harbin. China 2. Ph.D Student, Institute of Engineering Mechanics, Harbin. China 3
The 14 th World Conerence on Earthquake Engineering COMPARISON OF FRP-RETROFITTING STRATEGIES IN CHINESE AND ITALIAN CODES J. W. DAI 1, Y.R. WANG 2, B. JIN 1, 3, D.F.ZU 4, Silvia Alessandri 5, Giorgio
More informationBehavior of RC Columns Confined with CFRP Sheets and Subjected to Eccentric Loading
Lie Science Journal 2018;15(6) http:www.liesciencesite.com Behavior o RC Columns Conined with CFRP Sheets and Subjected to Eentric Loading Omar A. Farghal 1 and Mamdouh A. Kenawi 2 1 Civil Engineering
More informationINTERNATIONAL JOURNAL OF APPLIED ENGINEERING RESEARCH, DINDIGUL Volume 2, No 1, 2011
Interlaminar failure analysis of FRP cross ply laminate with elliptical cutout Venkateswara Rao.S 1, Sd. Abdul Kalam 1, Srilakshmi.S 1, Bala Krishna Murthy.V 2 1 Mechanical Engineering Department, P. V.
More informationDAMPING CONTROL OF A PZT MULTILAYER VIBRATION USING NEGATIVE IMPEDANCE CIRCUIT
International Workshop SMART MATERIALS, STRUCTURES & NDT in AEROSPACE Conference NDT in Canada 2011 2-4 November 2011, Montreal, Quebec, Canada DAMPING CONTROL OF A PZT MULTILAYER VIBRATION USING NEGATIVE
More informationSimulation of Piezoelectric Induced Lamb Waves in Plates
Simulation of Piezoelectric Induced Lamb Waves in Plates C. WILLBERG, J. M. VIVAR-PEREZ, Z. AHMAD and U. GABBERT ABSTRACT The use of Lamb waves for damage detection and non-destructive evaluation have
More informationDynamic analysis of Composite Micro Air Vehicles
Dynamic analysis of Composite Micro Air Vehicles Shishir Kr. Sahu Professor and Head, Civil Engineering, National Institute of Technology, Rourkela, India E-mail: sksahu@nitrkl.ac.in ABSTRACT The present
More informationTensile 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 informationSubmitted to Journal of Infrastructure Systems, ASCE
Submitted to Journal of Infrastructure Systems, ASCE A LOW-COST VARIANT OF ELECTRO-MECHANICAL IMPEDANCE (EMI) TECHNIQUE FOR STRUCTURAL HEALTH MONITORING Ramakanta Panigrahi 1, Suresh Bhalla 2 and Ashok
More informationAnalog Computing Technique
Analog Computing Technique by obert Paz Chapter Programming Principles and Techniques. Analog Computers and Simulation An analog computer can be used to solve various types o problems. It solves them in
More informationThickness Optimization of a Piezoelectric Converter for Energy Harvesting
Excerpt from the Proceedings of the COMSOL Conference 29 Milan Thickness Optimization of a Piezoelectric Converter for Energy Harvesting M. Guizzetti* 1, V. Ferrari 1, D. Marioli 1 and T. Zawada 2 1 Dept.
More informationSOUND TRANSMISSION LOSS OF A DOUBLE-LEAF PARTITION WITH MICRO-PERFORATED PLATE INSERTION UNDER DIFFUSE FIELD INCIDENCE
International Journal o Automotive and Mechanical Engineering (IJAME) ISSN: 2229-8649 (Print); ISSN: 2180-1606 (Online); Volume 7, pp. 1086-1095, January-June 2013 Universiti Malaysia Pahang DOI: http://dx.doi.org/10.15282/ijame.7.2012.23.0088
More informationFailure Diagrams of FRP Strengthened RC Beams
Failure Diagrams o FRP Strengthened RC Beams Abstract Bo GAO a, Christopher K. Y. LEUNG b and Jang-Kyo KIM a* a Department o Mechanical Engineering and b Department o Civil Engineering Hong Kong University
More information