| 摘要 |
PURPOSE:To reduce the working required for measurement while elevating the measuring accuracy, by computing a residual stress from the measurement of an axial and circumferential strains associated with cutting out of a disc and a strain in circumferential and radial directions of the disc associated with the cutting out of a piece. CONSTITUTION:A disc 2 is cut out of a cylindrical material 1 and axial and circumferential strains generated during the cutting out of a disc 2 in the circumferential surface of the disc 2 is measured. Then, pieces (elements) 3 are cut out at positions including 1 in the radial direction of the disc 2 and circumferential and radial strains of the disc 2 generated during the cutting out of the piece 3 are measured at the position where the piece 3 existed. Then, from the results of the measurement of the strains, the residual stress is calculated by computation at each position in the radial direction of the cylindrical material 1. This can curtail equipment and labors significantly while the measured value can be obtained with a high accuracy. |
