Patent ID: 11898923
Assignee: UNIVERSITY PUBLIC CORPORATION OSAKA
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 2:
3. A calculating method for calculating a residual stress distribution at a cross section between a first metal part and a second metal part of a metal member, the calculating method comprising:
by using an analytical model in which a cut-surface is interpolated to the cross section of the metal member, the step of calculating a residual force vector that is a sum of a load vector acting on a first metal piece at the cut-surface and a load vector acting on a second metal piece at the cut-surface;
the step of calculating, as a modified displacement vector, an amount of movement at the cross section by interpolating the residual force vector as a forced load to the cross section of an analytical model of the metal member;
by using an analytical model having a shape of a cut-surface of the first metal piece obtained by cutting off the metal member at the cross section in such a way that the first metal part becomes the first metal piece or by using an analytical model having a shape of a cut-surface of the second metal piece obtained by cutting off the metal member at the cross section in such a way that the second metal part becomes the second metal piece, the step of modifying the shape of the cut-surface of the first metal piece or the shape of the cut-surface of the second metal piece on the basis of the calculated modified displacement vector; and
by using the analytical model in which the shape of the cut-surface of the first metal piece is modified or the analytical model in which the shape of the cut-surface of the second metal piece is modified, the step of calculating a residual stress distribution at the cross section by interpolating a forced displacement to the analytical model.