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Xie, Longtao: Three-dimensional Green’s function and its derivatives for anisotropic elastic, piezoelectric and magnetoelectroelastic materials. 2016
Inhalt
Abstract
Contents
List of Figures
List of Tables
Introduction
Anisotropic materials and Green's function
State of the art and objectives
Overview of the thesis
Mathematical preliminaries
Basic equations of anisotropic linear elasticity
Basic equations of linear piezoelectricity
Basic equations of linear magnetoelectroelasticity
Stroh formalism
A general solution in anisotropic linear elasticity
Stroh eigenvalue problem for an oblique plane
Fundamentals of the Green's function
Green's function in boundary value problems
Green's function for multifield coupled media
Boundary integral equations
Green's function in anisotropic linear elasticity
Problem statement
Line integral Green's function and its derivatives
Explicit Green's function and its derivatives
Residue calculus method
Stroh formalism method
Unified explicit Green's function and its derivatives
Rearrangements of the integrals
Unified explicit expressions
Verifications and comparison of the different methods
Verification of the numerical integration method
Verification of the residue calculus method
Verification of the Stroh formalism method
Verification of the unified explicit expressions
Comparison of the efficiency
Numerical examples
Numerical results near the degenerated point
Numerical results for an arbitrary point on a unit sphere
Concluding remarks
Green's function in linear piezoelectricity
Problem statement
Stroh formalism method
Representation of the Green's function
First derivative of the Green's function
Second derivative of the Green's function
Residue calculus method
Representation of the Green's function
First derivative of the Green's function
Second derivative of the Green's function
Numerical procedures
Numerical examples and discussions
Concluding remarks
Green's function in linear magnetoelectroelasticity
Problem statement
Stroh formalism method
Representation of the Green's function
First derivative of the Green's function
Second derivative of the Green's function
Numerical examples and discussions
Concluding remarks
Applications of the Green's function and its derivatives in the BEM
Preliminary remarks
Description of the BEM for anisotropic linear elasticity
Numerical examples
Cube under tension
Cube with a spheroidal cavity under tension
Concluding remarks
Summary and outlook
Appendix A - Residue calculus of an improper line integral
Appendix B - Explicit expressions of Ni and Nij
Appendix C - Auxiliary functions F(n)m for the second derivative of the Green’s function
Appendix D - Explicit expression of the Stroh eigenvector
Bibliography