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Title:The dual boundary element method applied to semi-infinite surface cracks in two-dimensions
Author(s):Koehler, Daniel
Advisor(s):Tortorelli, Daniel A.
Department / Program:Mechanical Sci & Engineering
Discipline:Mechanical Engineering
Degree Granting Institution:University of Illinois at Urbana-Champaign
Subject(s):Dual Boundary Element Method
semi-infinite edge cracks
hypersingular integration
Abstract:The goal of his thesis is to evaluate the stress intensity factors (SIF) for surface cracks in semi-infinite solids via the DBEM. We first detail the derivations of the boundary element and dual boundary element methods. The main difficulty with these methods are integrations of the singular integrals which cannot be accuartely evaluated via standard Gauss quadrature schemes. An analytical integration scheme has therefore been implemented to overcome this difficulty. The SIFs are recovered as a post-processing step using the crack tip opening displacement method. A computer code using FORTRAN.90 is developed to verify the effectiveness of the DBEM and its application to fracture problems.
Issue Date:2015-01-21
Rights Information:Copyright 2014 Daniel G. Koehler
Date Available in IDEALS:2015-01-21
Date Deposited:2014-12

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