主き裂前方にある微小欠陥が強度に及ぼす影響について : 第3報,主き裂-すべり帯相互作用による微小き裂進展の下限界条件に関するモデル化

概要

論文の詳細を見る
In the present paper, in order to elucidate micromechanically the crack length dependence of threshold stress for no crack growth in steel, we propose a main crack-slip band interaction model which consists of a main crack, a dislocation free zone, and a slip band. Analyzing the above model by the method based on the continuously distributed theory of dislocations, we obtain the distribution functions and the stress intensity factors K both at the tip of the main crack and the slip band in a closed form. Using these K values, we can elucidate the effective range of the above interaction model and the crack shielding effect by a slip band. Furthermore, the analytical expression for the crack length dependence of threshold stress for no crack growth, which involves the effect of the crack length and grain size, can be obtained successfully by using the present model.
社団法人日本機械学会の論文
1995-09-25