ラインスプリングモデルを用いた異種材界面き裂の動的応力拡大係数の解析

概要

論文の詳細を見る
In this study, a method for calculating the dynamic stress intensity factor of a bimaterial bending specimen with an interface crack is proposed for the first time by making use of a line-spring model. A precracked bending specimen is modeled by one-dimensional beam finite elements and a line-spring representing the stiffness or compliance of a cracked part. The present method enables the one-dimensional analysis of a two -dimensional crack problem ; thus the time variation of dynamic stress intensity factors of a bimaterial bending specimen with an interface crack can be obtained by making use of a personal computer within a few minutes. The results obtained from the present method agree reasonably well with those obtained from the two-dimensional finite element method, although a slight difference in period can be found. The present method enables rapid evaluation of dynamic stress intensity factors. Thus a rapid evaluation system of dynamic fracture toughness of a bimaterial with an interface crack can be achieved by combining an impact test apparatus with a computer program based on the present method which runs on a personal computer.
一般社団法人日本機械学会の論文
1995-12-25