二相横等方性弾性体の基本解を用いた三次元境界要素法による三次元接合体角部の特異応力場の解析

概要

論文の詳細を見る
In recent years, composite materials and ceramics-metal joints are investigated from a view of fundamental technology for producing the industrial products. In these materials, the stress concentration frequently occurs at the vicinity of joint edges and it causes cracks there. In the present study, we derived the fundamental solution for a unit force acting a point interior a two-phase transversely isotropic material, which is a bonded structure of two transversely isotropic materials with different properties. We developed a three-dimensional boundary element program using the fundamental solution. We examined the continuity of displacements and stresses at the interface of two-phase transversely isotropic materials to check the correctness of the program. We conducted the stress analysis for joints of Ti-Mg and Mg-Zn and performed the eigen value analysis based on FEM, which is formulated using a intepolation function considering stress singularity at the vertex. We showed that the results of BEM and FEM are very agreed with each other, and the stress singularities of power law and logarithmic law occur at the vertex of the three-dimensional anisotropic joints.
一般社団法人日本機械学会の論文
2003-03-25