単結晶の引張試験および圧縮試験において分解せん断応力を求めるための従来の計算式の理論的検討および一般化

概要

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General equations are derived for calculating the resolved shear stresses (RSS) on any slip system during arbitrary homogeneous slip deformation of single crystals in tensile tests and compression tests. RSS can be evaluated by the equations (ERSS) from shape and orientation (or initial shape, initial orientation and the change in shape) of the crystal specimens and the applied load. Much misunderstanding and confusion in the literature about the conventional ERSS is elucidated:e. g., ( 1 ) the conventional ERSS for tensile tests is the same as the ERSS for ideal tensile tests, wherein both stress and slip deformation are homogeneous; ( 2 ) the conventional ERSS for compression tests coincides with the equation to calculate volume average of RSS for frictionless compression tests, in which the load is perpendicular to the end-faces of the cylindrical specimen and the stress is usually inhomogeneous; ( 3 ) we can suppose ideal tests in compression, for which the same ERSS holds as in tension and, when single slip occurs, the loading axis rotates in the direction opposite to that in tension.
一般社団法人日本機械学会の論文
1992-06-25