Numerical modeling of 2-D smooth crack growth
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摘要: Numerical algorithm to simulate 2-D smooth crack is presented. The stepwise method based on local criteria of propagation used. Two are employed. At the first stage propagation, maximum tensile stress criterion used take into account abrupt change in tangent direction. subsequent stages, assumption that intensity factor (SIF) K_2= 0 at current tip exploited. analytical formulae for calculating SIFs given. displacement discontinuities (DD) involved these found from numerical solution a complex hypersingular integral equation (CHSIE) piecewise homogeneous plane with curvilinear cracks. new mechanism approximation path by circular arcs each suggested. results They confirm efficiency
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