異なる負荷形式下のディンプル破壊シミュレーション

概要

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The three kinds of fracture specimens are tested under different constraint conditions. One is 3PB (3 Point Bending) specimen, another is CCT (Center Cracked Tension) specimen, and the third one is called CCB (Center Cracked Bending) specimen. By the SEM (Scanning Electron Microscope) observation, it is shown that the roughness of fracture surface is different from each other largely. The number of large voids and the average diameter of them are also different from each other. They are the effect of constraint condition. The dimple fracture process is simulated by the finite element method. By the finite element analyses, the crack tip stress fields are obtained. The distribution pattern of the high stress triaxiality area corresponds to the fracture surface roughness qualitatively. The fracture pattern near the initial crack tip also agrees with the experimental data.
社団法人日本機械学会の論文
2001-04-25