き裂と粒界との干渉 : 転位壁モデルを用いる検討

概要

論文の詳細を見る
The interaction between a crack and a grain boundary is studied by the singular integral equation method. The dislocation wall model is used for representation of a low-angle grain boundary and the crack is assumed to be described by the continuous distribution of infinitesimal dislocations. The problem is first reduced to a system of singular integral equations with standard Cauchy kernels, which is solved by using the Gauss-Chebyshev integration formula, and then the stress intensity factors at the crack tip are calculated numerically. The influence of the distance and angle between the crack and dislocation wall, length of dislocation wall and the dislocation spacing of the wall on the stress intensity factors is examined. Finally, the correspondence to single dislocation-crack interaction obtained using the Rice-Thomson model is discussed.
一般社団法人日本機械学会の論文
1994-05-25