Powerful Modelling Techniques in Abaqus to Simulate

Size: px
Start display at page:

Download "Powerful Modelling Techniques in Abaqus to Simulate"

Transcription

1 Powerful Modelling Techniques in Abaqus to Simulate Necking and Delamination of Laminated Composites D. F. Zhang, K.M. Mao, Md. S. Islam, E. Andreasson, Nasir Mehmood, S. Kao-Walter 1. Dept. of Mech. Eng., Blekinge Institute of Technology, SE , Karlskrona, Sweden 2. Dassault Systemes SIMULIA Corp, West Lafayette, Indiana, USA 3. Fac. of Mech. & El. Eng., Shanghai Second Polytechnic Univ., Shanghai, China SIMULIA 2015 Regional User Meeting, Copenhagen, Denmark 12th October 2015

2 Contents 1. Motivation 2. Objectives 4. Simulation Results 5. Achievements 6. Perspectives 1

3 1. Motivation Various kinds of Packaging in our daily life Microstructure illustration of Packaging Each layer has special function. Essential Constituent Al-foil:prevent oxygen and light LDPE (Low Density Polyethylene ):avoid moist [from Eskil Andreasson] Necking Delamination Micrographs of Necking and Delamination in Packaging Materials [SEM microgaph by Nasir Mehmood, et al] 2

4 2. Objectives to Develop 2-D FEM models based on present techniques in ABAQUS, which can be used to simulate NECKING and interfacial DELAMINATION. They will work as robust numerical analysis tools for our further research. Al-foil LDPE Schematic diagram of the FEM model to be developed [by Eskil Andreasson] 3

5 3.1 Technique Framework Technique Framework No. Necking in substrates/al-foil, LDPE Interfacial Delamination 1 VCCT 2 Elastic-Plastic Progressive Damage Constitutive Cohesive Zone 3 XFEM 4

6 3.2 Modelling of Necking in Substrates Necking σ (Damage Initiation Point) D=0 a Undamaged Response Dσ Stress Concentration Material Softening Stiffness Degradation E E (1 D)E Damaged Evolution Response Softening and Necking (Failure Point) D=1 b ε Schematic diagram of our developed material constitutive 5

7 3.2 Modelling of Necking in Substrates Elastic-Plastic Progressive Damage Constitutive Elastic Behavior Hooke s Law Yield Criterion J2 Plasticity/Von Mises Plastic Behavior Hardening Law Isotropic Hardening Flow Rule Associated Flow Damage Ductile Damage Model 6

8 3.2 Modelling of Necking in Substrates Ductile Damage Model Ductile Damage Model-Void Nucleation, Growth, and Coalescence We Find these phenomena from experiments. So, Ductile Damage Model is used in our model. 7

9 3.3 Modelling techniques of Interfacial Delamination VCCT-Virtual Crack Closure Technique Energy released to Open the crack = Energy to Close it Schematic representation of VCCT for Mode I crack 8

10 3.3 Modelling techniques of Interfacial Delamination VCCT-Virtual Crack Closure Technique y, v 6 5 Load F v,2,5 4 Load F v,2,5 F v,2,5 crit δ 1,6 2 3 δ 2,5 crit x, u 1 Area=G IC db Displacement δ2,5 Calculation illustration of strain energy released for Mode I crack based on VCCT Fracture Criterion for Mode I 1 2,,, Fracture Criterion for Mixed Mode 1.0 Power Law Model 9

11 3.3 Modelling techniques of Interfacial Delamination Cohesive Element Cohesive Zone Technique: Surface-based, or Element-based, i.e. Cohesive Element Cohesive Element-Traction-Separation Cohesive Law Traction Separation Schematic diagram of Bi-linear Traction-Separation cohesive law 10

12 3.3 Modelling techniques of Interfacial Delamination Cohesive Element Traction Simplified, Bi-Linear Cohesive Law Separation Damage Initiation Criterion of Interfacial Delamination Quadratic nominal strain criterion Quade Evolution Criterion based on energy Power Law Model 1 1 Bi linear cohesive Law 11

13 3.3 Modelling techniques of Interfacial Delamination XFEM XFEM-eXtended Finite Element Method, is especially designed for treating Strong or Weak discontinuities, e.g. Crack, Bi-material problem. Interfacial Delamination Fracture Bi-material Interface XFEM 12

14 3.3 Modelling techniques of Interfacial Delamination XFEM XFEM is extended by adding special enriched functions into generalized FEM. displacement jump across Crack-surface 13 Crack-tip singularity

15 3.3 Modelling techniques of Interfacial Delamination XFEM Illustration of normal and tangential coordinates for a smooth crack 1 0, crack 1, crack sin 2, cos 2, sin sin 2, sincos 2 In our model, Damage Initiation Criterion-Quade Damage Evolution Criterion-Power Law based on Energy Very similar to Cohesive Case 14

16 3.4 FEM Models utilizing VCCT, Cohesive Element, XFEM A pre-made interfacial defect A displacement boundary condition on the right side All Degree Of Freedom on the left side are constrained (a) It is realized by initial debonding part of Slave-Master Contact Pair. (b) It is the part without cohesive elements in interface. (c) It is a pre-made horizontal crack in interface. In the 3 models, CPE4 are used in substrates. In (b), COH2D4 and SWEEP meshing technique should be used in interface. In (c), CPE4 are used in substrates and interface, but the mesh in front of pre-made crack tips could be much finer. 15

17 4. Simulation Results Necking and interfacial delamination are achieved in all three models, as expected. Deformation results of simulation and theoretic analysis are very similar. 16

18 5. Achievements 17

19 6. Perspectives These models will be used in our future research: (1) The model with VCCT will be used to get fracture mechanics parameters directly during necking and delamination, such as fracture energy. (2) The model with Cohesive Element will be adopted to study the influence mechanism of adhesion level or interface strength on necking and delamination. A 1/4 uniaxial tension FEM model based on Cohesive Element is created because of symmetry 18

20 6. Perspectives These models will be used in our future research, such as: (3) The model with XFEM will be utilized to simulate propagation of multi-cracks in substrates and interface. (4) A 3D-FEM model suggested will be developed, and more extensive research will be implemented, such as evolution mechanism of interface debond in length and width direction. Illustration of 3D FEM model from [Teng Li, Z. Suo, 2007] 19

21 THANKS FOR YOUR ATTENTION! 20

Modeling Fracture and Failure with Abaqus

Modeling Fracture and Failure with Abaqus Modeling Fracture and Failure with Abaqus Day 1 Lecture 1 Lecture 2 Lecture 3 Workshop 1 Workshop 2 Basic Concepts of Fracture Mechanics Modeling Cracks Fracture Analysis Crack in a Three-point Bend Specimen

More information

A Study of Shear Stress Intensity Factor of PP and HDPE by a Modified Experimental Method together with FEM

A Study of Shear Stress Intensity Factor of PP and HDPE by a Modified Experimental Method together with FEM A Study of Shear Stress Intensity Factor of PP and HDPE by a Modified Experimental Method together with FEM Md. Shafiqul Islam, Abdullah Khan, Sharon Kao-Walter, Li Jian Abstract Shear testing is one of

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

Cohesive band model: a triaxiality-dependent cohesive model for damage to crack transition in a non-local implicit discontinuous Galerkin framework

Cohesive band model: a triaxiality-dependent cohesive model for damage to crack transition in a non-local implicit discontinuous Galerkin framework University of Liège Aerospace & Mechanical Engineering Cohesive band model: a triaxiality-dependent cohesive model for damage to crack transition in a non-local implicit discontinuous Galerkin framework

More information

An Energy Dissipative Constitutive Model for Multi-Surface Interfaces at Weld Defect Sites in Ultrasonic Consolidation

An Energy Dissipative Constitutive Model for Multi-Surface Interfaces at Weld Defect Sites in Ultrasonic Consolidation An Energy Dissipative Constitutive Model for Multi-Surface Interfaces at Weld Defect Sites in Ultrasonic Consolidation Nachiket Patil, Deepankar Pal and Brent E. Stucker Industrial Engineering, University

More information

Cohesive Band Model: a triaxiality-dependent cohesive model inside an implicit non-local damage to crack transition framework

Cohesive Band Model: a triaxiality-dependent cohesive model inside an implicit non-local damage to crack transition framework University of Liège Aerospace & Mechanical Engineering MS3: Abstract 131573 - CFRAC2017 Cohesive Band Model: a triaxiality-dependent cohesive model inside an implicit non-local damage to crack transition

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

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

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

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

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

Multi-scale digital image correlation of strain localization

Multi-scale digital image correlation of strain localization Multi-scale digital image correlation of strain localization J. Marty a, J. Réthoré a, A. Combescure a a. Laboratoire de Mécanique des Contacts et des Strcutures, INSA Lyon / UMR CNRS 5259 2 Avenue des

More information

Delamination Modeling for Power Packages and Modules. Rainer Dudek, R. Döring, S. Rzepka Fraunhofer ENAS, Micro Materials Center Chemnitz

Delamination Modeling for Power Packages and Modules. Rainer Dudek, R. Döring, S. Rzepka Fraunhofer ENAS, Micro Materials Center Chemnitz Delamination Modeling for Power Packages and Modules Rainer Dudek, R. Döring, S. Rzepka Fraunhofer ENAS, Micro Materials Center Chemnitz The Micro Materials Center @ Virtual Prototyping Finite Element

More information

BRIDGING LAW SHAPE FOR LONG FIBRE COMPOSITES AND ITS FINITE ELEMENT CONSTRUCTION

BRIDGING LAW SHAPE FOR LONG FIBRE COMPOSITES AND ITS FINITE ELEMENT CONSTRUCTION Proceedings of ALGORITMY 2012 pp. 353 361 BRIDGING LAW SHAPE FOR LONG FIBRE COMPOSITES AND ITS FINITE ELEMENT CONSTRUCTION VLADISLAV KOZÁK AND ZDENEK CHLUP Abstract. Ceramic matrix composites reinforced

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

Supplementary Figures

Supplementary Figures Fracture Strength (GPa) Supplementary Figures a b 10 R=0.88 mm 1 0.1 Gordon et al Zhu et al Tang et al im et al 5 7 6 4 This work 5 50 500 Si Nanowire Diameter (nm) Supplementary Figure 1: (a) TEM image

More information

A 3D Discrete Damage Modeling Methodology for Abaqus for Fatigue Damage Evaluation in Bolted Composite Joints

A 3D Discrete Damage Modeling Methodology for Abaqus for Fatigue Damage Evaluation in Bolted Composite Joints A 3D Discrete Damage Modeling Methodology for Abaqus for Fatigue Damage Evaluation in Bolted Composite Joints Eugene Fang 1, Ling Liu 1, Michael Stuebner 1, Jim Lua 1 1 Global Engineering and Materials,

More information

FRACTURE MECHANICS IN ANSYS R16. Session 04 Fracture Mechanics using Cohesive Zone Material (CZM) Model

FRACTURE MECHANICS IN ANSYS R16. Session 04 Fracture Mechanics using Cohesive Zone Material (CZM) Model FRACTURE MECHANICS IN ANSYS R16 Session 04 Fracture Mechanics using Cohesive Zone Material (CZM) Model COHESIVE ZONE MATERIAL MODEL (CZM) Fracture or delamination along an interface between phases plays

More information

After lecture 16 you should be able to

After lecture 16 you should be able to Lecture 16: Design of paper and board packaging Advanced concepts: FEM, Fracture Mechanics After lecture 16 you should be able to describe the finite element method and its use for paper- based industry

More information

A FINITE ELEMENT MODEL TO PREDICT MULTI- AXIAL STRESS-STRAIN RESPONSE OF CERAMIC MATRIX COMPOSITES WITH STRAIN INDUCED DAMAGE

A FINITE ELEMENT MODEL TO PREDICT MULTI- AXIAL STRESS-STRAIN RESPONSE OF CERAMIC MATRIX COMPOSITES WITH STRAIN INDUCED DAMAGE A FINITE ELEMENT MODEL TO PREDICT MULTI- AXIAL STRESS-STRAIN RESPONSE OF CERAMIC MATRIX COMPOSITES WITH STRAIN INDUCED DAMAGE Daxu Zhang and D. R. Hayhurst School of Mechanical, Aerospace and Civil Engineering,

More 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

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

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

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

ICM11. Simulation of debonding in Al/epoxy T-peel joints using a potential-based cohesive zone model

ICM11. Simulation of debonding in Al/epoxy T-peel joints using a potential-based cohesive zone model Available online at www.sciencedirect.com Procedia Engineering 10 (2011) 1760 1765 ICM11 Simulation of debonding in Al/epoxy T-peel joints using a potential-based cohesive zone model Marco Alfano a,, Franco

More information

Analysis of Interfacial Debonding in Three-Dimensional Composite Microstructures

Analysis of Interfacial Debonding in Three-Dimensional Composite Microstructures Shriram Swaminathan Department of Mechanical Engineering, The Ohio State University, Columbus, OH 43210 N. J. Pagano Senior Scientist Emeritus AFRL/MLBC, Wright-Patterson AFB, OH 45433-7750 Somnath Ghosh

More information

Transactions on Engineering Sciences vol 6, 1994 WIT Press, ISSN

Transactions on Engineering Sciences vol 6, 1994 WIT Press,  ISSN Significance of the characteristic length for micromechanical modelling of ductile fracture D.-Z. Sun, A. Honig Fraunhofer-Institut fur Werkstoffmechanik, Wohlerstr. 11, D-79108 Freiburg, Germany ABSTRACT

More information

Numerical Analysis of Delamination Behavior in Laminated Composite with Double Delaminations Embedded in Different Depth Positions

Numerical Analysis of Delamination Behavior in Laminated Composite with Double Delaminations Embedded in Different Depth Positions Numerical Analysis of Delamination Behavior in Laminated Composite with Double Delaminations Embedded in Different Depth Positions Numerical Analysis of Delamination Behavior in Laminated Composite with

More information

CFRP. FRP FRP. Abaqus

CFRP. FRP FRP. Abaqus C Epoxy C baqus C FE baqus C amene.kia@gmail.com EROG 1 Debonding : / C (mm) E c (MPa) f' c (MPa) f' t (MPa) a S L d h b 1 2 3 1 2 3 baqus C Leong Kok Leong Kok CDP E p (GPa) (MPa) E a (MPa) G a (MPa)

More information

Measurement of ultra-thin film fracture by nanoindentation:

Measurement of ultra-thin film fracture by nanoindentation: Graduate Theses and Dissertations Iowa State University Capstones, Theses and Dissertations 2011 Measurement of ultra-thin film fracture by nanoindentation: a numerical study Benjamin A. Burke Iowa State

More information

A 3D ductile constitutive mixed-mode model of cohesive elements for the finite element analysis of adhesive joints

A 3D ductile constitutive mixed-mode model of cohesive elements for the finite element analysis of adhesive joints Downloaded from orbit.dtu.dk on: Jun 28, 2018 A 3D ductile constitutive mixed-mode model of cohesive elements for the finite element analysis of adhesive joints Anyfantis, Konstantinos; Tsouvalis, Nicholas

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

Fracture 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 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 information

Fracture Mechanics, Damage and Fatigue Linear Elastic Fracture Mechanics - Energetic Approach

Fracture Mechanics, Damage and Fatigue Linear Elastic Fracture Mechanics - Energetic Approach University of Liège Aerospace & Mechanical Engineering Fracture Mechanics, Damage and Fatigue Linear Elastic Fracture Mechanics - Energetic Approach Ludovic Noels Computational & Multiscale Mechanics of

More information

Numerical Simulation of Fatigue Crack Growth: Cohesive Zone Models vs. XFEM

Numerical Simulation of Fatigue Crack Growth: Cohesive Zone Models vs. XFEM Numerical Simulation of Fatigue Crack Growth: Cohesive Zone Models vs. XFEM Thomas Siegmund Purdue University 1 Funding JOINT CENTER OF EXCELLENCE for ADVANCED MATERIALS, FAA Cooperative Agreement 04-C-AM-PU.

More information

Fatigue Damage Development in a Steel Based MMC

Fatigue Damage Development in a Steel Based MMC Fatigue Damage Development in a Steel Based MMC V. Tvergaard 1,T.O/ rts Pedersen 1 Abstract: The development of fatigue damage in a toolsteel metal matrix discontinuously reinforced with TiC particulates

More information

Engineering Solid Mechanics

Engineering Solid Mechanics }} Engineering Solid Mechanics 1 (2013) 1-8 Contents lists available at GrowingScience Engineering Solid Mechanics homepage: www.growingscience.com/esm Impact damage simulation in elastic and viscoelastic

More information

Development of discontinuous Galerkin method for linear strain gradient elasticity

Development of discontinuous Galerkin method for linear strain gradient elasticity Development of discontinuous Galerkin method for linear strain gradient elasticity R Bala Chandran Computation for Design and Optimizaton Massachusetts Institute of Technology Cambridge, MA L. Noels* Aerospace

More information

MMJ1133 FATIGUE AND FRACTURE MECHANICS A - INTRODUCTION INTRODUCTION

MMJ1133 FATIGUE AND FRACTURE MECHANICS A - INTRODUCTION INTRODUCTION A - INTRODUCTION INTRODUCTION M.N.Tamin, CSMLab, UTM Course Content: A - INTRODUCTION Mechanical failure modes; Review of load and stress analysis equilibrium equations, complex stresses, stress transformation,

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

TABLE OF CONTENTS CHAPTER TITLE PAGE DECLARATION DEDICATION ACKNOWLEDGEMENT ABSTRACT ABSTRAK

TABLE OF CONTENTS CHAPTER TITLE PAGE DECLARATION DEDICATION ACKNOWLEDGEMENT ABSTRACT ABSTRAK vii TABLE OF CONTENTS CHAPTER TITLE PAGE DECLARATION DEDICATION ACKNOWLEDGEMENT ABSTRACT ABSTRAK TABLE OF CONTENTS LIST OF TABLES LIST OF FIGURES LIST OF ABBREVIATIONS LIST OF SYMBOLS ii iii iv v vi vii

More information

Modeling and simulation of continuous fiberreinforced

Modeling and simulation of continuous fiberreinforced Scholars' Mine Doctoral Dissertations Student Research & Creative Works 2014 Modeling and simulation of continuous fiberreinforced ceramic composites Venkata Bheemreddy Follow this and additional works

More information

ENGN 2340 Final Project Report. Optimization of Mechanical Isotropy of Soft Network Material

ENGN 2340 Final Project Report. Optimization of Mechanical Isotropy of Soft Network Material ENGN 2340 Final Project Report Optimization of Mechanical Isotropy of Soft Network Material Enrui Zhang 12/15/2017 1. Introduction of the Problem This project deals with the stress-strain response of a

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

*MAT_PAPER and *MAT_COHESIVE_PAPER: Two New Models for Paperboard Materials

*MAT_PAPER and *MAT_COHESIVE_PAPER: Two New Models for Paperboard Materials 14 th International LS-DYNA Users Conference Session: Constitutive Modeling *MAT_PAPER and *MAT_COHESIVE_PAPER: Two New Models for Paperboard Materials Jesper Karlsson 1, Mikael Schill 1, Johan Tryding

More information

Lecture #10: Anisotropic plasticity Crashworthiness Basics of shell elements

Lecture #10: Anisotropic plasticity Crashworthiness Basics of shell elements Lecture #10: 151-0735: Dynamic behavior of materials and structures Anisotropic plasticity Crashworthiness Basics of shell elements by Dirk Mohr ETH Zurich, Department of Mechanical and Process Engineering,

More information

SDM 2013 Student Papers Competition Modeling fiber-matrix splitting failure through a mesh-objective continuum-decohesive finite element method

SDM 2013 Student Papers Competition Modeling fiber-matrix splitting failure through a mesh-objective continuum-decohesive finite element method Structures, Structural Dynamics, and Materials and Co-located Conferences April 8-11, 2013, Boston, Massachusetts 54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference AIAA

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

A MECHANISM FOR DUCTILE FRACTURE IN SHEAR. Viggo Tvergaard Department of Mechanical Engineering,

A MECHANISM FOR DUCTILE FRACTURE IN SHEAR. Viggo Tvergaard Department of Mechanical Engineering, A MECHANISM FOR DUCTILE FRACTURE IN SHEAR Viggo Tvergaard Department of Mechanical Engineering, Solid Mechanics Technical University of Denmark, Bldg. 44, DK-8 Kgs. Lyngby, Denmark N.A. Fleck, J.W. Hutchinson

More information

Crash and Impact Simulation of Composite Structures by Using CAE Process Chain

Crash and Impact Simulation of Composite Structures by Using CAE Process Chain Crash and Impact Simulation of Composite Structures by Using CAE Process Chain Madhukar Chatiri 1, Thorsten Schütz 2, Anton Matzenmiller 3, Ulrich Stelzmann 1 1 CADFEM GmbH, Grafing/Munich, Germany, mchatiri@cadfem.de

More information

An Atomistic-based Cohesive Zone Model for Quasi-continua

An Atomistic-based Cohesive Zone Model for Quasi-continua An Atomistic-based Cohesive Zone Model for Quasi-continua By Xiaowei Zeng and Shaofan Li Department of Civil and Environmental Engineering, University of California, Berkeley, CA94720, USA Extended Abstract

More information

Multiscale analyses of the behaviour and damage of composite materials

Multiscale analyses of the behaviour and damage of composite materials Multiscale analyses of the behaviour and damage of composite materials Presented by Didier BAPTISTE ENSAM, LIM, UMR CNRS 8006 151 boulevard de l hôpital l 75013 PARIS, France Research works from: K.Derrien,

More information

Constitutive models: Incremental plasticity Drücker s postulate

Constitutive models: Incremental plasticity Drücker s postulate Constitutive models: Incremental plasticity Drücker s postulate if consistency condition associated plastic law, associated plasticity - plastic flow law associated with the limit (loading) surface Prager

More information

Transactions on Engineering Sciences vol 6, 1994 WIT Press, ISSN

Transactions on Engineering Sciences vol 6, 1994 WIT Press,  ISSN Strain energy release rate calculation from 3-D singularity finite elements M.M. Abdel Wahab, G. de Roeck Department of Civil Engineering, Katholieke Universiteit, Leuven, B-3001 Heverlee, Belgium ABSTRACT

More information

Enhancing Prediction Accuracy In Sift Theory

Enhancing Prediction Accuracy In Sift Theory 18 TH INTERNATIONAL CONFERENCE ON COMPOSITE MATERIALS Enhancing Prediction Accuracy In Sift Theory J. Wang 1 *, W. K. Chiu 1 Defence Science and Technology Organisation, Fishermans Bend, Australia, Department

More information

Finite Element Modeling of Viscoelastic Behavior and Interface Damage in Adhesively Bonded Joints Feifei Cheng, Ö. Özgü Özsoy and J.N.

Finite Element Modeling of Viscoelastic Behavior and Interface Damage in Adhesively Bonded Joints Feifei Cheng, Ö. Özgü Özsoy and J.N. Finite Element Modeling of Viscoelastic Behavior and Interface Damage in Adhesively Bonded Joints Feifei Cheng, Ö. Özgü Özsoy and J.N. Reddy* Advanced Computational Mechanics Laboratory, Department of

More information

Analysis of Order of Singularity at a Vertex in 3D Transversely Isotropic Piezoelectric Single-Step Bonded Joints

Analysis of Order of Singularity at a Vertex in 3D Transversely Isotropic Piezoelectric Single-Step Bonded Joints American Journal of Engineering Research (AJER) 203 American Journal of Engineering Research (AJER) e-issn : 2320-047 p-issn : 2320-0936 Volume-02, Issue-09, pp-7-99 www.ajer.org Research Paper Open Access

More information

Experiments and Numerical Simulations on Stress-State-Dependence of Ductile Damage Criteria

Experiments and Numerical Simulations on Stress-State-Dependence of Ductile Damage Criteria Experiments and Numerical Simulations on Stress-State-Dependence of Ductile Damage Criteria Michael Brünig, Steffen Gerke and Daniel Brenner Abstract The paper deals with a series of new experiments and

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

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

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

Frontiers of Fracture Mechanics. Adhesion and Interfacial Fracture Contact Damage

Frontiers of Fracture Mechanics. Adhesion and Interfacial Fracture Contact Damage Frontiers of Fracture Mechanics Adhesion and Interfacial Fracture Contact Damage Biology, Medicine & Dentistry The Next Frontiers For Mechanics One of the current challenges in materials & mechanics is

More information

COMPRESSIVE BEHAVIOR OF IMPACT DAMAGED COMPOSITE LAMINATES

COMPRESSIVE BEHAVIOR OF IMPACT DAMAGED COMPOSITE LAMINATES 16 TH INTERNATIONAL CONFERENCE ON COMPOSITE MATERIALS COMPRESSIVE BEHAVIOR OF IMPACT DAMAGED COMPOSITE LAMINATES Hiroshi Suemasu*, Wataru Sasaki**, Yuuichiro Aoki***, Takashi Ishikawa**** *Department of

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

Studies of Bimaterial Interface Fracture with Peridynamics Fang Wang 1, Lisheng Liu 2, *, Qiwen Liu 1, Zhenyu Zhang 1, Lin Su 1 & Dan Xue 1

Studies of Bimaterial Interface Fracture with Peridynamics Fang Wang 1, Lisheng Liu 2, *, Qiwen Liu 1, Zhenyu Zhang 1, Lin Su 1 & Dan Xue 1 International Power, Electronics and Materials Engineering Conference (IPEMEC 2015) Studies of Bimaterial Interface Fracture with Peridynamics Fang Wang 1, Lisheng Liu 2, *, Qiwen Liu 1, Zhenyu Zhang 1,

More information

Linear and Nonlinear Analysis of High Dynamic Impact Events with Creo Simulate and Abaqus/Explicit

Linear and Nonlinear Analysis of High Dynamic Impact Events with Creo Simulate and Abaqus/Explicit Linear and Nonlinear Analysis of High Dynamic Impact Events with Creo Simulate and Abaqus/Explicit SAXSIM 2015, TU Chemnitz Dr.-Ing. Roland Jakel At a glance: Altran, a global leader 20+ Countries 23,000+

More information

Dynamic Analysis of a Reinforced Concrete Structure Using Plasticity and Interface Damage Models

Dynamic Analysis of a Reinforced Concrete Structure Using Plasticity and Interface Damage Models Dynamic Analysis of a Reinforced Concrete Structure Using Plasticity and Interface Damage Models I. Rhee, K.J. Willam, B.P. Shing, University of Colorado at Boulder ABSTRACT: This paper examines the global

More information

IMECE CRACK TUNNELING: EFFECT OF STRESS CONSTRAINT

IMECE CRACK TUNNELING: EFFECT OF STRESS CONSTRAINT Proceedings of IMECE04 2004 ASME International Mechanical Engineering Congress November 13-20, 2004, Anaheim, California USA IMECE2004-60700 CRACK TUNNELING: EFFECT OF STRESS CONSTRAINT Jianzheng Zuo Department

More information

A COUPLED HYGROTHERMAL COHESIVE LAYER MODEL FOR SIMULATING DEBOND GROWTH IN BIMATERIAL INTERFACE YONG WANG

A COUPLED HYGROTHERMAL COHESIVE LAYER MODEL FOR SIMULATING DEBOND GROWTH IN BIMATERIAL INTERFACE YONG WANG A COUPLED HYGROTHERMAL COHESIVE LAYER MODEL FOR SIMULATING DEBOND GROWTH IN BIMATERIAL INTERFACE By YONG WANG Bachelor of Science Tsinghua University Beijing, China 1986 Master of Science Tsinghua University

More information

Comparison of Results for Delamination in Sandwich Hulls due to Local Water Slamming Loads using LSDYNA and Coupled FE-BEMs

Comparison of Results for Delamination in Sandwich Hulls due to Local Water Slamming Loads using LSDYNA and Coupled FE-BEMs The 19 TH INTERNATIONAL CONFEERNCE ON COMPOSITE MATERIALS Comparison of Results for Delamination in Sandwich Hulls due to Local Water Slamming Loads using LSDYNA and Coupled FE-BEMs R. C. Batra* and J.

More information

NONLINEAR ANALYSIS OF A DAM-RESERVOIR-FOUNDATION SYSTEM UNDER SPATIALLY VARIABLE SEISMIC EXCITATIONS

NONLINEAR ANALYSIS OF A DAM-RESERVOIR-FOUNDATION SYSTEM UNDER SPATIALLY VARIABLE SEISMIC EXCITATIONS October 12-17, 28, Beijing, China NONLINEAR ANALYSIS OF A DAM-RESERVOIR-FOUNDATION SYSTEM UNDER SPATIALLY VARIABLE SEISMIC EXCITATIONS J. Huang 1 and A. Zerva 2 1 Dept. of Civil, Architectural and Environmental

More information

International Power, Electronics and Materials Engineering Conference (IPEMEC 2015)

International Power, Electronics and Materials Engineering Conference (IPEMEC 2015) International Power, Electronics and Materials Engineering Conference (IPEMEC 015) Research Based on Cohesive Zone Model for Interface Delamination of Waste Plastic Chip Xueping Liu 1, a, Zufu Pang 1,,b,

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

Lecture #8: Ductile Fracture (Theory & Experiments)

Lecture #8: Ductile Fracture (Theory & Experiments) Lecture #8: Ductile Fracture (Theory & Experiments) by Dirk Mohr ETH Zurich, Department of Mechanical and Process Engineering, Chair of Computational Modeling of Materials in Manufacturing 2015 1 1 1 Ductile

More information

Fracture mechanics fundamentals. Stress at a notch Stress at a crack Stress intensity factors Fracture mechanics based design

Fracture mechanics fundamentals. Stress at a notch Stress at a crack Stress intensity factors Fracture mechanics based design Fracture mechanics fundamentals Stress at a notch Stress at a crack Stress intensity factors Fracture mechanics based design Failure modes Failure can occur in a number of modes: - plastic deformation

More information

Prediction of Elastic Constants on 3D Four-directional Braided

Prediction of Elastic Constants on 3D Four-directional Braided Prediction of Elastic Constants on 3D Four-directional Braided Composites Prediction of Elastic Constants on 3D Four-directional Braided Composites Liang Dao Zhou 1,2,* and Zhuo Zhuang 1 1 School of Aerospace,

More information

Fluid driven cohesive crack propagation in quasi-brittle materials

Fluid driven cohesive crack propagation in quasi-brittle materials Fluid driven cohesive crack propagation in quasi-brittle materials F. Barpi 1, S. Valente 2 Department of Structural and Geotechnical Engineering, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129

More information

MESOSCOPIC MODELLING OF MASONRY USING GFEM: A COMPARISON OF STRONG AND WEAK DISCONTINUITY MODELS B. Vandoren 1,2, K. De Proft 2

MESOSCOPIC MODELLING OF MASONRY USING GFEM: A COMPARISON OF STRONG AND WEAK DISCONTINUITY MODELS B. Vandoren 1,2, K. De Proft 2 Blucher Mechanical Engineering Proceedings May 2014, vol. 1, num. 1 www.proceedings.blucher.com.br/evento/10wccm MESOSCOPIC MODELLING OF MASONRY USING GFEM: A COMPARISON OF STRONG AND WEAK DISCONTINUITY

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

Stress Concentration. Professor Darrell F. Socie Darrell Socie, All Rights Reserved

Stress Concentration. Professor Darrell F. Socie Darrell Socie, All Rights Reserved Stress Concentration Professor Darrell F. Socie 004-014 Darrell Socie, All Rights Reserved Outline 1. Stress Concentration. Notch Rules 3. Fatigue Notch Factor 4. Stress Intensity Factors for Notches 5.

More information

Adhesive Joints Theory (and use of innovative joints) ERIK SERRANO STRUCTURAL MECHANICS, LUND UNIVERSITY

Adhesive Joints Theory (and use of innovative joints) ERIK SERRANO STRUCTURAL MECHANICS, LUND UNIVERSITY Adhesive Joints Theory (and use of innovative joints) ERIK SERRANO STRUCTURAL MECHANICS, LUND UNIVERSITY Wood and Timber Why I m intrigued From this to this! via this Fibre deviation close to knots and

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

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

Finite Element-Based Failure Models for Carbon/Epoxy Tape Composites

Finite Element-Based Failure Models for Carbon/Epoxy Tape Composites Finite Element-Based Failure Models for Carbon/Epoxy Tape Composites A Master Thesis Presented to The Academic Faculty by Guillaume Seon In Partial Fulfillment of the Requirements for the Degree Master

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

Cohesive Zone Modeling of Dynamic Fracture: Adaptive Mesh Refinement and Coarsening

Cohesive Zone Modeling of Dynamic Fracture: Adaptive Mesh Refinement and Coarsening Cohesive Zone Modeling of Dynamic Fracture: Adaptive Mesh Refinement and Coarsening Glaucio H. Paulino 1, Kyoungsoo Park 2, Waldemar Celes 3, Rodrigo Espinha 3 1 Department of Civil and Environmental Engineering

More information

Model-independent approaches for the XFEM in fracture mechanics

Model-independent approaches for the XFEM in fracture mechanics Model-independent approaches for the XFEM in fracture mechanics Safdar Abbas 1 Alaskar Alizada 2 and Thomas-Peter Fries 2 1 Aachen Institute for Computational Engineering Science (AICES), RWTH Aachen University,

More information

Alternative numerical method in continuum mechanics COMPUTATIONAL MULTISCALE. University of Liège Aerospace & Mechanical Engineering

Alternative numerical method in continuum mechanics COMPUTATIONAL MULTISCALE. University of Liège Aerospace & Mechanical Engineering University of Liège Aerospace & Mechanical Engineering Alternative numerical method in continuum mechanics COMPUTATIONAL MULTISCALE Van Dung NGUYEN Innocent NIYONZIMA Aerospace & Mechanical engineering

More information

TESTING AND ANALYSIS OF COMPOSITE SKIN/STRINGER DEBONDING UNDER MULTI-AXIAL LOADING.

TESTING AND ANALYSIS OF COMPOSITE SKIN/STRINGER DEBONDING UNDER MULTI-AXIAL LOADING. TESTING AND ANALYSIS OF COMPOSITE SKIN/STRINGER DEBONDING UNDER MULTI-AXIAL LOADING. Ronald Krueger*, Michael K. Cvitkovich*, T. Kevin O'Brien**, and Pierre J. Minguet*** * National Research Council Research

More information

MECHANICAL BEHAVIOUR OF TEAR OPENING IN INJECTION MOULDED PLASTIC TOPS

MECHANICAL BEHAVIOUR OF TEAR OPENING IN INJECTION MOULDED PLASTIC TOPS MECHANICAL BEHAVIOUR OF TEAR OPENING IN INJECTION MOULDED PLASTIC TOPS JOHAN ISAKSSON Structural Mechanics Master s Dissertation Structural Mechanics ISRN LUTVDG/TVSM--4/5127--SE (1-55) ISSN 281-6679

More information

Numerical Modelling of Blockwork Prisms Tested in Compression Using Finite Element Method with Interface Behaviour

Numerical Modelling of Blockwork Prisms Tested in Compression Using Finite Element Method with Interface Behaviour 13 th International Brick and Block Masonry Conference Amsterdam, July 4-7, 2004 Numerical Modelling of Blockwork Prisms Tested in Compression Using Finite Element Method with Interface Behaviour H. R.

More information

Nigerian Journal of Technology, Vol. 26, No. 2, June 2007 Edelugo 37

Nigerian Journal of Technology, Vol. 26, No. 2, June 2007 Edelugo 37 Nigerian Journal of Technology, Vol. 26, No. 2, June 2007 Edelugo 37 APPLICATION OF THE REISSNERS PLATE THEORY IN THE DELAMINATION ANALYSIS OF A THREE-DIMENSIONAL, TIME- DEPENDENT, NON-LINEAR, UNI-DIRECTIONAL

More information

Development of X-FEM methodology and study on mixed-mode crack propagation

Development of X-FEM methodology and study on mixed-mode crack propagation Acta Mech. Sin. (2011) 27(3):406 415 DOI 10.1007/s10409-011-0436-x RESEARCH PAPER Development of X-FEM methodology and study on mixed-mode crack propagation Zhuo Zhuang Bin-Bin Cheng Received: 2 February

More information

Direct Comparison of Anisotropic Damage Mechanics to Fracture Mechanics of Explicit Cracks

Direct Comparison of Anisotropic Damage Mechanics to Fracture Mechanics of Explicit Cracks Direct Comparison of Anisotropic Damage Mechanics to Fracture Mechanics of Explicit Cracks John A. Nairn Wood Science and Engineering, Oregon State University, Corvallis, OR 97330, USA Tel: +1-541-737-4265

More information

Heterogeneous structures studied by interphase elasto-damaging model.

Heterogeneous structures studied by interphase elasto-damaging model. Heterogeneous structures studied by interphase elasto-damaging model. Giuseppe Fileccia Scimemi 1, Giuseppe Giambanco 1, Antonino Spada 1 1 Department of Civil, Environmental and Aerospace Engineering,

More information

Investigation of progressive damage and fracture in laminated composites using the smeared crack approach

Investigation of progressive damage and fracture in laminated composites using the smeared crack approach 53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference20th AI 23-26 April 2012, Honolulu, Hawaii AIAA 2012-1537 Investigation of progressive damage and fracture in laminated

More information

Studies on the affect of Stress Triaxiality on Strain Energy Density, and CTOD under Plane Stress Condition Subjected to Mixed Mode (I/II) Fracture

Studies on the affect of Stress Triaxiality on Strain Energy Density, and CTOD under Plane Stress Condition Subjected to Mixed Mode (I/II) Fracture Studies on the affect of Stress Triaxiality on Strain Energy Density, and CTOD under Plane Stress Condition... Studies on the affect of Stress Triaxiality on Strain Energy Density, and CTOD under Plane

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

NUMERICAL ANALYSIS OF SANDWICH PANELS SUBJECTED TO POINT LOADS

NUMERICAL ANALYSIS OF SANDWICH PANELS SUBJECTED TO POINT LOADS ECCOMAS Congress 216 VII European Congress on Computational Methods in Applied Sciences and Engineering M. Papadrakakis, V. Papadopoulos, G. Stefanou, V. Plevris (eds.) Crete Island, Greece, 5 1 June 216

More information

Finite Element Computations of Complex Stress Intensity Factor Magnitude of Interfacial Crack in Bi-Material Composites

Finite Element Computations of Complex Stress Intensity Factor Magnitude of Interfacial Crack in Bi-Material Composites 16 th International Conference on AEROSPACE SCIENCES & AVIATION TECHNOLOGY, ASAT - 16 May 26-28, 215, E-Mail: asat@mtc.edu.eg Military Technical College, Kobry Elkobbah, Cairo, Egypt Tel : +(22) 2425292

More information