J^^^ 積分を用いた高速き裂の動的応力拡大係数の有限要素解析

概要

論文の詳細を見る
A numerical method using the J^^^-integral is presented to analyze the dynamic problems of rapidly propagating crack by conventional finite elements. In order to simulate the crack propagation, the node release technique is employed in which the modal force near the crack-tip is gradually reduced to zero according to a formula chosen. It is found from numerical tests that satisfactory results are obtained by a linear relaxation formula. The dynamic stress intensity factor is determined by evaluating one of the three types of path(area)-independent formulae of J^^^-integral. It is shown that the computed results for elastodynamic problems are in good agreement with the analytical solutions and other available numerical results. It is also shown that the dynamic stress intensity factor of the viscoelastic problems can be determined by the formula of J^^^-integral which is independent of stress-strain relation.
一般社団法人日本機械学会の論文
1986-02-25