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QUASISTATIC CRACK PROPAGATION
FATIGUE CRACK PROPAGATION
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boundary element formulation boundary element mesh boundary element method boundary integral equation boundary value problem Chapter computed crack axis crack extension crack increment crack length crack problem crack propagation analysis crack propagation problems crack tip displacements and tractions element results energy release rate evaluated experimental fatigue crack propagation fracture initiation theories fracture locus fracture mechanics fracture step fracture toughness Gaussian quadrature geometry given in Eq global equilibrium Hussian Ingraffea 1977 initial crack integral equation intensity factor range interface linear elastic linear elastic fracture load mixed-mode fracture initiation mixed-mode fracture problems mode I stress Mostovoy multidomain node numerical obtained Path Computations plane strain predicted Primary Crack Path problem of Fig pure mode quadratic boundary elements ratio rigid body motion shown in Fig strain energy stress intensity factors subdomain tensile stress thesis Tirosh traction singular quarter-point transition elements two-dimensional