半円表面き裂を有する数種の立方晶系単結晶の応力拡大係数

概要

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This paper describes the stress intensity factor for a semicircular surface crack embedded in a finite plate of cubic single crystals of Cu, Ni, Si, Al, and W, in consideration of anisotropy caused by the crystallographic texture. The correction factor F_I of the stress intensity factor was calculated by means of the 3D finite-element method (FEM). The F_I value depends on both the material and crystal direction. The relationships among the F_I value and Young's modulus, shear modulus, and Poisson's ratio were discussed. A simple method of estimating the F_I value for cubic single crystals was proposed by introducing a parameter which expresses the intensity of elastic anisotropy. The F_I value can be estimated by this method in the range of elastic anisotropy between 1.00 and 3.20 for several crystal directions.
一般社団法人日本機械学会の論文
1995-06-25