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- W4205655357 abstract "The influence of overload-induced crack deflections and bifurcations on the propagation behavior of mode I fatigue cracks is studied using specialized finite-element (FE) software. The FE program is validated through comparisons between FE-calculated and analytical stress intensity factors for a crack with a small kink at its tip. The SIF of bifurcated cracks are then obtained using the software. It is observed that such deviations of the crack path cause significant growth retardation and even crack arrest. The Quebra2D program simulates two-dimensional fracture processes based on a FE self-adaptive mesh-generation strategy, using appropriate crack tip elements and crack increment criteria. The adaptive FE analyzes are coupled with modem and efficient automatic remeshing schemes. The meshing algorithm especially developed for Quebra2D works both for regions without cracks and for regions with one or multiple cracks, which either are embedded or surface breaking. In the Quebra2D program, three methods are selected to compute the stress intensity factors along the crack path—the displacement correlation technique, the potential energy release rate computed by means of a modified crack-closure integral technique, and the J- integral computed by means of the equivalent domain integral together with a mode decomposition scheme." @default.
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- W4205655357 date "2003-01-01" @default.
- W4205655357 modified "2023-09-28" @default.
- W4205655357 title "Finite element modeling of fatigue crack bifurcation" @default.
- W4205655357 doi "https://doi.org/10.1016/b978-008044046-0/50114-7" @default.
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