114 斜め隅き裂および円孔から生じる縁き裂の三次元疲労伝ぱシミュレーション(GS-3 疲労き裂の発生と伝ぱ)

概要

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The present authors proposed a method for predicting fatigue lives of a two-dimensional crack propagation in residual stress fields, by making use of the crack propagation behavior expressed in terms of effective stress intensity range, and of effective range ratio U expressed in terms of stress ratio. Extensions of this method to three-dimensional surface and corner cracks have been made. In this paper, the proposed method of prediction was applied to three-dimensional slant and hole-corner cracks by using finite element method. The amount and direction of crack extension were evaluated at each point of the crack front to simulate complex change in the three-dimensional crack shapes in actual structures. The effects of residual stresses and contact stresses were examined. The applicability of the method was demonstrated.
社団法人日本機械学会の論文
2000-03-16