き裂エネルギ密度による安定成長き裂の破壊抵抗評価 : 第1報,基本関係の導出と評価方法の提案

概要

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The objective of this study is to propose a practical method to evaluate the fracture resistance of a stably growing crack by crack energy density and to verify it through applications of the method to actual stable crack growth problems. The contents of this report are as follows: (1) More refined investigation of the relationship obtained before between initial crack length, load-displacement curves and the crack energy density which holds until a crack starts to grow is shown by using two crack models. (2) A relationship between initial crack length, present crack length, load-displacement curves and the additional rate of crack energy density caused by crack extension which holds generally to a growing crack is derived by using the same crack models as in (1). (3) A method to evaluate the fracture resistance of a stably growing crack from load-displacement curves which can be easily obtained by experiments is proposed, based on the relations above.
一般社団法人日本機械学会の論文
1986-03-25