Abstract: Provided are a method of accurately reproducing, about a temperature-dependent physical constant of a solid substance, in a cyberspace, up to a high-temperature region, a change involved in a temperature rise and acquiring an estimated value conforming to an actual phenomenon, a program for causing a computes to execute the method, a recording medium storing the program, an apparatus including an arithmetic operation unit that executes the program, a processed product manufacturing method using the method, and a fatigue damage monitoring method. An estimated value acquisition method of the present invention is a method of acquiring an estimated value A of a temperature-dependent physical constant of a solid substance at a predetermined temperature, the method including data-assimilating a predicted value F of the physical constant calculated by a finite element method analysis to a measured value Y of the physical constant to acquire the estimated value A.

Abstract: To provide a calculation method that enables a heating plan for approximating a plate to an intended shape to be calculated in a short period of time. A calculation method according to the present invention is a calculation method of a heating plan for deforming a plate by heating, the calculation method including: a Bayesian optimization step of performing a Bayesian optimization by inputting a training data group including a plurality of combinations of heating conditions that include a heating shape having been set at an arbitrary location of an analysis model for an original shape being a shape of the plate and a shape that has been calculated based on the heating conditions and determining a heating conditions candidate; and a finite element analysis step of converting the heating conditions candidate into strain data and performing a structural analysis based on a finite element method by inputting the strain data to output a shape candidate.

Abstract: A residual stress distribution measuring method of the present invention is characterized by comprising: by using an analytical model in which a cut-surface is interpolated to a cross section of a 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 the shape of a cut-surface of a measured first or second metal piece, the step of modifying the shape of the cut-surface of the first or 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 or the second metal piece is modified, the

Abstract: A residual stress distribution measuring method of the present invention is characterized by comprising: by using an analytical model in which a cut-surface is interpolated to a cross section of a 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 the shape of a cut-surface of a measured first or second metal piece, the step of modifying the shape of the cut-surface of the first or 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 or the second metal piece is modified, the

Abstract: A displacement/stress computation unit computes residual stress and deformation by conducting a thermal-elastic-plastic analysis using idealized explicit FEM. A temperature increment is set in magnitude to have a value larger in magnitude than a temperature increment used in a thermal-elastic-plastic analysis using static implicit FEM. Heating is performed for each plurality of blocks according to a heating pattern in which blocks that are not adjacent to one another are simultaneously heated. Each block is heated with a surface heat source having a heat input quantity adjusted with respect to a heat input quantity applied when a moving heat source is used to heat the block.