1963 年 12 巻 112 号 p. 11-17
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 0σz, 0σt, 0σr be the residual stresses in the axial, tangential and radial direction respectively and also let εz and εv be the strain in the axial direction and volume strain when the surface layer is eliminated.
Then we have
where E: Young's modulus
ν: Poisson's ratio
f: Sectional area of specimen
The volume strain εv is, when we put v for specific volume after elimination
in which v0 is the specific volume before elimination.
The present report deals with the principle and the actual data of the measurements foregoing.