Domain-Integral Methods for Computation of Fracture-Mechanics Parameters in Three-Dimensional Functionally-Graded Solids
Walters, Matthew C.
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https://hdl.handle.net/2142/83268
Description
Title
Domain-Integral Methods for Computation of Fracture-Mechanics Parameters in Three-Dimensional Functionally-Graded Solids
Author(s)
Walters, Matthew C.
Issue Date
2005
Doctoral Committee Chair(s)
Paulino, Glaucio H.
Dodds, Robert H., Jr.
Department of Study
Civil and Environmental Engineering
Discipline
Civil and Environmental Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Engineering, Civil
Language
eng
Abstract
This work first develops and applies a domain integral method to compute J-integral and stress intensity factor values along crack fronts in FGM configurations under mode-I thermo-mechanical loading. The proposed domain integral formulation accommodates both linear-elastic and deformation-plastic behavior in FGMs. Next discussed is the extension of interaction-integral procedures to compute directly mixed-mode stress intensity factors and T-stresses along planar, curved cracks in FGMs under linear-elastic loading. The investigation addresses effects upon interaction integral procedures imposed by crackfront curvature, applied crack-face tractions and material nonhomogeneity. Additional considerations for T-stress evaluation include the influence of mode mixity and computation of the anti-plane shear component of non-singular stress, T13.
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