Cover -- Title Page -- Copyright Page -- Contents -- Preface -- Acknowledgements -- 1 Stress and Strain Analysis of Symmetric Composite Single Lap Joints Under Combined Tension and In-Plane Shear Loading -- 1.1 Introduction -- 1.2 Equations and Solution -- 1.2.1 Model Description -- 1.2.2 Governing Equations for Tension Loading Nx -- 1.2.3 Governing Equation for In-Plane Shear Loading Nxy -- 1.2.4 Solutions -- 1.2.4.1 Adhesive Peel Stress azz Due to Nx -- 1.2.4.2 Adhesive Shear Stress axz Due to Nx -- 1.2.4.3 Adhesive Shear Stress ayz Due to Nxy -- 1.3 Solution Verification -- 1.4 Yield Criterion -- 1.5 Case Studies -- 1.6 Summary -- References -- 2 Finite Element Modeling of Viscoelastic Behavior and Interface Damage in Adhesively Bonded Joints -- 2.1 Introduction -- 2.2 Finite Element Analysis of Viscoelastic Adhesively Bonded Joints -- 2.2.1 Constitutive Relation -- 2.2.2 Numerical Example -- 2.2.2.1 Stress Distribution along Overlap Length -- 2.2.2.2 Effect of Thermal Expansion -- 2.3 Damage Analysis of Viscoelastic Adhesively Bonded Joints -- 2.3.1 Constitutive Relation of Cohesive Element -- 2.3.1.1 Linear Elastic Traction-Separation Law -- 2.3.1.2 Damage Initiation and Evolution -- 2.3.2 Numerical Example -- 2.3.2.1 Joint Stiffness -- 2.3.2.2 Damage of Cohesive Elements -- 2.3.2.3 Effects of Interface Damage on Adhesive Layer -- 2.4 Summary and Conclusions -- Acknowledgements -- References -- 3 Modeling of Cylindrical Joints with a Functionally Graded Adhesive Interlayer -- 3.1 Introduction -- 3.2 Axisymmetric Model -- 3.2.1 Stress Fields in the Bonded Assembly -- 3.2.1.1 Inner Adherend -- 3.2.1.2 Adhesive -- 3.2.1.3 Outer Adherend -- 3.2.2 Stiffness Tailored Adhesive Interlayer -- 3.2.2.1 Tubular Joints -- 3.2.2.2 Shaft-Tube Joints -- 3.3 Constitutive Models of the Adherends and FMGB Adhesive -- 3.4 Variational Approach.

3.4.1 Case I: FMGB1 -- 3.4.2 Case II: FMGB -- 3.4.3 Case III: MMB1 -- 3.4.4 Case IV: MMB -- 3.5 Solution Procedure -- 3.6 Results and discussion -- 3.6.1 Influence of Bond Length (L) -- 3.6.2 Influence of Modulus Function -- 3.6.3 Influence of Stiffness Mismatch -- 3.7 Summary -- References -- 4 A Simplified Stress Analysis of Bonded Joints Using Macro-Elements -- 4.1 Introduction -- 4.1.1 Context -- 4.1.2 Objective -- 4.1.3 Overview of the Simplified Linear Elastic Method -- 4.1.4 Overview of the Paper -- 4.2 Linear Elastic 1D-Bar and 1D-Beam Models -- 4.2.1 1D-Bar Model -- 4.2.1.1 Formulation of the BBa Element -- 4.2.1.2 Assembly of the Stiffness Matrix for a Single-Lap Joint -- 4.2.2 1D-Beam Model -- 4.2.2.1 Formulation of the BBe Element -- 4.2.2.2 Validation on the Example Single-Lap Joint -- 4.3 Assuming a Non-linear Adhesive Material -- 4.3.1 Numerical Approach -- 4.3.2 Example of Application to Structures: Single-Lap Joint, In-Plane Loading -- 4.3.2.1 Equilibrium of the Structure -- 4.3.2.2 Determination of the Nodal Residue -- 4.3.2.3 Projected Stresses -- 4.3.2.4 Solution Procedure -- 4.3.3 Considering a Bi-Triangular Damage Evolution Adhesive Behavior -- 4.4 Validation -- 4.4.1 Overview -- 4.4.2 FE Models for a Validation Purpose -- 4.4.2.1 1D-Bar or 1D-Beam FE Models -- 4.4.2.2 3D FE Model Forced for 1D-Bar Analysis -- 4.4.3 1D-Bar Model -- 4.4.3.1 Linear Shear Stress in the Adherends -- 4.4.3.2 Elastic Perfectly Plastic Adhesive Material Behavior -- 4.4.3.3 Elastic Perfectly Plastic and Bi-linear Adhesive Material Behavior with Elastic Unloading -- 4.4.3.4 Bi-triangular Damage Evolution Adhesive Material Behavior with Elastic Unloading -- 4.4.4 1D-Beam Model -- 4.4.4.1 Linear Shear Stress in the Adherends -- 4.4.4.2 Thermal Expansion in the Adherends -- 4.5 Comparison With Finite Element Predictions -- 4.5.1 Overview.

4.5.2 Description of the 3D FE Model -- 4.5.3 Comparison of Results -- 4.5.3.1 Present 1D-Beam Model vs. 3D FE Models -- 4.5.3.2 Evolution of Adhesive Stress Distribution with the Applied Load -- 4.5.4 Assessment of the Relevance of the Model -- 4.6 Conclusion -- Acknowledgment -- References -- 5 Simulation of Bonded Joints Failure using Progressive Mixed-Mode Damage Models -- 5.1 Introduction -- 5.2 Cohesive Damage Model -- 5.3 Measurement of Cohesive Parameters -- 5.3.1 Double Cantilever Beam (DCB) Test -- 5.3.2 End Notched Flexure (ENF) Test -- 5.3.3 Determination of Cohesive Parameters of the Trapezoidal Law -- 5.3.4 Bonded Joints Strength Prediction -- 5.4 Continuum Damage Models -- 5.4.1 Application to DCB Test -- 5.4.2 Application to Single-Lap Joints -- 5.5 Conclusion -- References -- 6 Testing of Dual Adhesive Ceramic-Metal Joints for Aerospace Applications -- 6.1 Introduction -- 6.2 Experimental Details -- 6.2.1 Materials -- 6.2.2 Specimens -- 6.2.3 Static Testing at Low and High Temperature -- 6.2.4 Impact Testing at Room Temperature -- 6.3 Results -- 6.3.1 Static Testing -- 6.3.2 Impact Testing -- 6.4 Conclusions -- Acknowledgments -- References -- 7 Modelling of Composite Sandwich T-Joints Under Tension and Bending -- 7.1 Introduction -- 7.2 Description of the Experiment -- 7.3 Description of the Finite Element Model -- 7.4 Description of the Peel Stress Model: Strength of Materials Approach -- 7.4.1 Tensile Model: Stress Based Assessment -- 7.4.2 Bending Model: Stress Based Assessment -- 7.5 Results and Discussion -- 7.5.1 Experimental Measurement and Finite Element Analysis -- 7.5.2 Peel Stress Analysis: Finite Element and Peel Stress Models -- 7.5.2.1 Tensile Model -- 7.5.2.2 Bending Model -- 7.5.2.3 Limitations of Peel Stress Model -- 7.6 Concluding Remarks -- Acknowledgement -- References.

8 Strength Prediction Methods for Adhesively Bonded Lap Joints between Composite-Composite/Metal Adherends -- 8.1 Introduction -- 8.1.1 Literature on the Stress Analysis of Bonded Joints -- 8.1.1.1 Two-Dimensional Analysis -- 8.1.1.2 Three-Dimensional Solutions -- 8.1.2 Strength Prediction of Bonded Joints -- 8.1.2.1 Elastic Singularities at the Ends of Lap Length -- 8.2 Strength Prediction Using Characteristic Distances in Problems with Singular Stresses -- 8.2.1 Point Stress Criterion -- 8.2.2 Average Stress Criterion -- 8.3 Strength Prediction in Aluminium-Aluminium Joints -- 8.3.1 Experimental Failure Load Determination -- 8.3.2 FE Analysis -- 8.4 Strength Prediction in CFRP-Aluminium and CFRP-CFRP Joints -- 8.4.1 Details of the Experiment -- 8.4.2 FE Analysis of CFRP Composite-Al and CFRP-CFRP Bonded Joints -- 8.5 Results and Discussion -- 8.5.1 Convergence Study of FEA Results -- 8.5.2 Characteristic Distance in Single Lap Adhesively Bonded Joints Using Point Stress Criterion -- 8.6 Conclusions -- Acknowledgments -- References -- 9 Interface Failure Detection in Adhesively Bonded Composite Joints Using a Novel Vibration-Based Approach -- 9.1 Introduction -- 9.2 Conventionally Used Non-destructive Techniques (NDTs) for Damage Detection -- 9.2.1 Ultrasonic -- 9.2.2 Optical Fibers -- 9.2.3 Vibration Signature -- 9.2.4 Lamb Waves -- 9.3 Motivation and Methodology -- 9.3.1 Hilbert-Huang Transform -- 9.3.2 Energy Damage Index (EDI) -- 9.4 Experimental Procedure -- 9.4.1 Specimens Preparation and Description of Damage Cases -- 9.4.2 Test Procedure and Equipment -- 9.5 Experimental Results -- 9.6 Finite Element Modeling Investigation -- 9.6.1 Adhesive Single Lap Joint Model -- 9.6.2 Finite Element Model Verification and Results -- 9.6.2.1 Model Verification -- 9.6.2.2 Disbond Damage in FRP/FRP ABJs -- 9.6.2.3 Disbond Damage in FRP/Aluminum ABJs.

9.6.2.4 Disbond Damage in Aluminum/Aluminum ABJs -- 9.6.2.5 Delamination Damage in ABJs -- 9.7 Summary and Conclusions -- Acknowledgments -- References.