日本機械学会論文集 A編
Online ISSN : 1884-8338
Print ISSN : 0387-5008
円孔又は介在物を含む材料の疲労破壊経路予測移動有限要素法シミュレーション
西岡 俊久桝上 真由子元 瑛〓藤本 岳洋
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74 巻 (2008) 742 号 p. 805-811

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It is well known that approximately 70 to 80 percent of the failure accidents that occur in complex structures that have such holes are caused by the fatigue fracture. That is, we need to know fatigue fracture path to evaluate health. In this paper, we carried out fatigue fracture path prediction simulation containing multiple circular holes or inclusions in specimens. Furthermore the effect of their existence on crack growth was examined. The simulations were conducted using the moving finite element method based on Delaunay automatic triangulation, and the numerical result of the specimens containing multiple circular holes was compared with the experimental result. In the fatigue fracture path prediction simulation, Paris's law was used to decide crack propagation length Δa and local symmetry criterion was used to decide crack propagation direction.

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