界面き裂問題の一数値解析方法

概要

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A numerical method of analyzing fracture mechanics parameters for interface crack was presented. This method utilizes the node-point displacement and node-point load of finite element analysis to evaluate the stress intensity factor K. As an example, the K value of cracks in a homegeneous materials was evaluated with the mesh size having 5〜10% of the crack length and high accuracy with less than 5% error was obtained. For cracks on the Al/epoxy bi-material interface, the Mode-I stress intensity factor evaluted with or without no-slip zone was found to be analogous to the analysis by Mark et al. Also a linear relationship was found between k_I and the stress σ_<yy> in the crack tip element irrespective of material combination, stress state or loading condition.
社団法人日本材料学会の論文
1985-11-15