有限要素解析による三次元き裂エネルギー密度評価のための基礎的検討

概要

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Crack Energy Density (CED) is a parameter which is clearly defined, without any restrictions on constitutive equations, throughout the life of a crack, and which is expected to describe, successfully and in a unified form, almost all kinds of behavior of a crack. Therefore, CED can be reasonably defined for a 3-dimensional crack as well, and its definition and the fundamental matters concerned have already been discussed. In this paper, 3-dimensional elastic and elastic-plastic finite element analyses of a center-cracked specimen under tension are carried out using a continuum notch model and discontinuous model (generalized Dugdale model) , and the distributions of CED along the crack front line are evaluated by previously obtained path-independent expressions. The availability of path-independent expressions in the evaluation of CED is examined, and the applicability of the discontinuous model to 3-dimensional crack problems is shown through these results.
一般社団法人日本機械学会の論文
1989-07-25