モードIII負荷における弾塑性応力集中の簡易評価法

概要

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Methods of evaluating stress and strain concentrations in the elastic-plastic region under mode III loading were proposed on the basis of numerical analysis by a finite element method. In the case of small-scale yielding, the stress and strain concentration factors under mode III loading were estimated with good accuracy by using the master curves identically the same as those obtained previously under mode I loading. Under the large-scale and general yielding conditions, the maximum stress and strain at the notch root under mode III loading were successfully estimated by using similarly the previously obtained mode I master curves expressed in terms of J-integral. Several methods of deriving the master curves and a formula for calculating J-integral values with engineering simplicity were discussed. It was demonstrated that Neuber's rule was not valid even under the mode III loading and overestimated considerably stress and strain concentrations.
一般社団法人日本機械学会の論文
1985-01-25