残留応力の測定について(第1報) : 熱処理した中実円筒の残留応力の測定について

概要

論文の詳細を見る
The boring method of Sachs is wellknown for the measurement of residual stress of cylinder. This method is not suitable to apply to hard specimens or those with small diameters. Moreover, there is a possibility of producing plastic deformation around the bore made in the center of specimen. In this report is explained a new method of the measurement of residual stress for the heat treated solid specimen with small diameters, which consists in eliminating the specimens from the surface by corrosion and then measuring the resultant change in the axial length and the specific volume. Let _0σ_z, _0σ_t, _0σ_r be the residual stresses in the axial, tangential and radial direction respectively and also let ε_z be the strain in the axial direction and volume strain when the surface layer in eliminated. The we have _0σ_z=-E/(1+ν){(ε_z+ν/(1-2ν)ε_ν)+fd/df(ε_z+ν/(1-2ν)ε_ν)} _0σ_t=E/(2(1+ν)){(ε_z-1/(1-2ν)ε_ν)+2fd/df(ε_z+ν/(1-2ν)ε_ν)} _0σ_r= E/(2(1+ν)) (ε_z-1/(1-2ν)ε_ν) where E : Young's modulus ν : Poisson's ratio f : Sectional area of specimen The volume strainε_ν is, when we put ν^^- for specific volume after eliminationε_ν=(2(1-2ν))/(3(1-ν)) (ν^^--ν^^-_0)/(ν^^-_0) in which ν^^-_0 is the specific volume before elimination. The present report deals with the principle and the actual data of the measurements foregoing.
1963-01-15