生成形シミュレーションによる安定成長き裂のCED破壊抵抗評価

概要

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It was shown previously that the CED (crack energy density) or its additional rate evaluated through the experiments of stable crack growth can be a parameter which expresses the fracture resistance, peculiar to fracture mode, of a material from the onset of stable crack growth to the rapid unstable fracture consistently. In this paper, simulation methods for stable crack growth by finite element analyses of the discontinuous model are studied, and the availability of CED above is confirmed through generation phase crack growth simulations corresponding to the experiments. The variation of the J-integral is also evaluated in simulations, and it is shown that the CED is more promising and reasonable than any J-based parameter to express the fracture resistance of a crack.
一般社団法人日本機械学会の論文
1991-02-25