Modeling damage, fatigue and failure of composite materials / edited by Ramesh Talreja and Janis Varna ; contributors A. Barroso [and twenty three others].

Format:

Book

Contributor:

Talreja, R., editor.

Varna, Janis, editor.

Barroso, A., contributor.

Series:

Woodhead Publishing series in composites science and engineering ; Number 65.

Woodhead Publishing series in composites science and engineering ; Number 65

Language:

English

Subjects (All):

Composite materials--Mathematical models.

Composite materials.

Composite materials--Fatigue.

Composite materials--Fracture.

Physical Description:

1 online resource (474 p.)

Edition:

1st ed.

Place of Publication:

Amsterdam, [Netherlands] : Woodhead Publishing, 2016.

Language Note:

English

Summary:

Modelling Damage, Fatigue and Failure of Composite Materials provides the latest research on the field of composite materials, an area that has attracted a wealth of research, with significant interest in the areas of damage, fatigue, and failure.The book is a comprehensive source of physics-based models for the analysis of progressive and.

Contents:

Front Cover

Related titles

Modeling Damage, Fatigue and Failure of Composite Materials

Copyright

Contents

List of contributors

Woodhead Publishing Series in Composites Science and Engineering

Preface

One - Damage development incomposite materials

1 - Composite materials: constituents, architecture, and generic damage

1.1 Introduction

1.2 Composite constituents

1.2.1 Introduction

1.2.2 Fibers

1.2.3 Fiber sizing

1.2.4 Matrices for composites

1.3 Fiber architecture and internal stresses

1.4 Manufacturing defects

1.5 Generic damage in composite materials

1.5.1 Introduction

1.5.2 Fiber-matrix debonding

1.5.3 Matrix cracking

1.5.3.1 Introduction

1.5.3.2 Observation and quantification of matrix cracks

1.5.3.3 Matrix cracking under quasi-static loading

1.5.3.4 Matrix cracking under fatigue loading

1.5.3.5 Mechanical property changes due to matrix cracking

1.5.4 Fiber fracture

1.5.5 Delaminations

1.6 Conclusions

References

2 - Fatigue damage mechanisms

2.1 Introduction

2.2 Axial tension fatigue of UD composites

2.2.1 Experimental observations

2.2.2 Fatigue life diagrams (FLDs)

2.2.2.1 Nonprogressive fiber failure (Region I)

2.2.2.2 Progressive failure process (Region II)

2.2.2.3 Fatigue limit and Region III

2.2.2.4 Roles of constituents in the fatigue process

Effect of fiber stiffness

Effect of fiber-matrix interface

Effect of matrix inelasticity

2.3 Fatigue of UD composites in other loading modes

2.3.1 Compression loading

2.3.2 Off-axis loading

2.4 Conclusions

3 - Damage accumulation in textile composites

3.1 Introduction

3.2 Overview of damage development

3.3 Initiation of matrix cracks

3.4 Influence of the yarn crimp

3.5 Influence of through-the-thickness reinforcement.

3.6 Crack saturation and development of delaminations

3.7 Conclusions

4 - Damage accumulation under multiaxial fatigue loading

4.1 Introduction: parameters influencing the fatigue behavior of composites

4.2 Biaxial testing of composite laminates

4.3 Experimental results for the main test methods

4.3.1 Results of tests on cruciform specimens

4.3.2 Results of tests on bars/rods

4.3.3 Results of tests on tubular specimens

4.3.4 Discussion

4.4 Recent results from the University of Padova

4.4.1 Description of damage evolution

4.4.2 Fatigue crack initiation results

4.4.3 Fatigue crack propagation results

4.4.4 Damage mechanisms at the microscopic scale

4.5 Comparison with results on flat laminates

4.6 Conclusions

Two - Modeling of failure mechanisms in composite materials

5 - Matrix and fiber-matrix interface cracking in composite materials

5.1 Introduction

5.2 Failure mechanisms

5.2.1 Transverse tension, σy 0

5.2.2 Transverse compression, σy&lt

0

5.2.3 In-plane shear

5.2.4 Combined loading

5.3 Modeling of failure initiation

5.3.1 Fiber-matrix debonding

5.3.2 Ductile matrix cracking

5.3.3 Brittle matrix cracking

5.3.4 Compressive matrix failure

5.4 Conclusions

6 - Fiber-matrix debonding in composite materials: transverse loading

6.1 Introduction

6.2 Micromechanical view: numerical model

6.3 Failure initiation

6.4 The interface crack

6.4.1 Energy release rate

6.4.2 Prediction of growth

6.5 Growth through the matrix

6.5.1 Kinking orientation

6.5.2 Prediction of growth

6.6 Micromechanical stages of the mechanism of damage under tension

6.7 Effect of a secondary transverse load

6.8 Effect of thermal residual stresses

6.9 Conclusions

Acknowledgments

References.

7 - Fiber-matrix debonding in composite materials: axial loading

7.1 Introduction

7.2 Single-fiber fragmentation test

7.2.1 Experimental procedure

7.2.2 Experimental results

7.3 Numerical simulation of debond crack propagation using LEFM

7.3.1 Theoretical background

7.3.2 Boundary element method model of the SFFT sample

7.3.3 Stress state within the sample

7.3.3.1 Axial stresses within the fiber

7.3.3.2 Interfacial stresses

7.3.4 Evaluation of the ERR and determination of the fiber-matrix Mode II interfacial fracture toughness

7.4 Numerical simulation of debond propagation using cohesive elements

7.4.1 Theoretical background

7.4.2 FEM modeling of the SFFT sample

7.4.3 Simulation of crack propagation

7.5 Discussion and concluding remarks

8 - Evolution of multiple matrix cracking

8.1 Introduction

8.2 Analytical models for evolution of multiple matrix cracking in cross ply laminates

8.2.1 Shear lag model

8.2.1.1 Energy-based shear lag analysis

8.2.2 Variational models

8.2.2.1 Vinogradov-Hashin analysis

8.2.3 Fracture-mechanics-based model

8.3 Damage evolution in multidirectional laminates

8.4 Statistical aspects in multiple matrix cracking

8.4.1 Vinogradov-Hashin model

8.5 Current issues and future trends

9 - Fiber failure and debonding in composite materials

9.1 Introduction

9.2 Damage mechanisms in UD composites in quasi-static loading

9.3 Failure mechanisms in tension-tension fatigue

9.4 Fiber debonding in quasi-static loading

9.4.1 Steady-state debond growth

9.4.1.1 Analytical models

9.4.1.2 FEM models

9.4.1.3 Results

9.4.2 Short debond growth

9.5 Debond growth in cyclic loading

9.5.1 Modeling

9.5.2 Experimental results and identification of parameters.

9.6 Effect of specimen surface on debond growth

9.7 Effect of neighboring fibers on debond growth

9.8 Future work

10 - Compression failure of composite laminates

10.1 Introduction

10.2 Modeling

10.2.1 Unidirectional strength

10.2.2 Multidirectional strength

10.2.3 Open-hole compressive strength: cohesive zone model

10.3 Strength data and predictions

10.3.1 Compressive strength

10.3.2 Open-hole compressive strength

10.4 Discussion and conclusions

11 - Delamination fractures in composite materials

11.1 Introduction

11.2 Fracture mechanics concepts

11.3 LEFM approach to delamination

11.3.1 Overview of LEFM

11.3.2 Some common LEFM test specimens

11.3.3 Design with LEFM

11.4 Advanced fracture mechanics

11.4.1 Overview of LSB

11.4.2 J-integral specimens

11.4.3 Design with LSB

11.5 Delamination under cyclic loading

11.5.1 LEFM approach: the Paris-Erdogan law

11.6 Perspectives and trends

11.6.1 Mode mixity-dependent fracture resistance

11.6.2 Micromechanical models of crack bridging

11.7 Summary

Three - Modeling of damage and materials response in composite materials

12 - Thermoelastic constants of damaged laminates: COD- and CSD-based methods

12.1 Introduction

12.2 Stiffness of damaged laminates in terms of COD and CSD

12.2.1 Global-local relationships (GLOB-LOC model)

12.2.2 Thermoelastic constants of balanced laminates with cracks in 90° layers

12.2.3 Determination of normalized COD and CSD

12.3 Average stress state between cracks and average COD and CSD

12.3.1 Average stresses expressed via axial stress perturbation in the central damaged layer: normal loading

12.3.2 Expression for COD for cracks in the central layer

12.3.3 CSD expression for cracks in the central layer.

12.3.4 COD and CSD relationship with average stresses in the case of two symmetrical damaged layers

12.3.5 Relationships for monoclinic sublaminates

12.4 Analytical models for stress state between cracks

12.4.1 Uniaxial tensile loading in the x2 direction

12.4.1.1 Shear lag models

12.4.1.2 Variational models

12.4.2 In-plane shear loading

12.5 Experimental data and simulation examples

12.5.1 Analytical formulas for axial modulus and shear modulus of cross-ply laminates

12.5.2 Examples of calculation and experiments

12.6 Conclusions

Appendices

Appendix 1. Derivation of damaged laminate stiffness

Appendix 2. Expressions for COD and CSD

13 - Microlevel approaches to modeling of damage in composite materials: generalized plane strain analysis

13.1 Introduction

13.2 Fundamental equations and conditions

13.2.1 Basic field equations

13.2.2 Boundary and interface conditions

13.2.3 Generalized plane strain conditions

13.3 Solution for undamaged laminates

13.4 Shear lag theory for cross-ply laminates

13.5 Generalized plane strain theory for cross-ply laminates

13.5.1 Solution for ply cracks

13.6 Calculation of in-plane thermoelastic constants for damaged laminates

13.7 Through-thickness properties of damaged laminates

13.8 Consideration of ply-crack closure

13.8.1 Uniaxial loading in the axial direction

13.8.2 Uniaxial loading in the in-plane transverse direction

13.8.3 Uniaxial loading in the through-thickness direction

13.8.4 Derivation of important interrelationships

13.9 Results for general symmetric laminates

13.10 Prediction examples for cross-ply laminates

14 - A multiscale approach to modeling of composite damage

14.1 Introduction

14.2 Basic concepts and considerations

14.3 Failure mechanisms

14.4 Multiscale analysis.

14.4.1 Continuum with internal state.

Notes:

Description based upon print version of record

Includes bibliographical references at the end of each chapters and index.

Description based on online resource; title from PDF title page (ebrary, viewed November 20, 2015).

Description based on publisher supplied metadata and other sources.

ISBN:

9781782422983

1782422986

OCLC:

929530022