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(<小特集>複合荷重下における疲労および疲労き裂進展挙動の最先端研究(実験的/解析的アプローチ))

概要

論文の詳細を見る
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 paht 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 Δα and local symmetry criterion was used to decide crack propagation direction.
社団法人日本機械学会の論文
2008-06-25