MATERIAL SIMULATION SYSTEM, MATERIAL SIMULATION METHOD, AND MATERIAL SIMULATION PROGRAM

摘要

PROBLEM TO BE SOLVED: To calculate the dynamic characteristic of a material covering a large strain zone including breaking strain and to simulate the material covering the large strain zone including breaking strain in a large strain rate zone including high strain rate zone.;SOLUTION: A force detecting block type high-speed material testing machine is controlled so that tension, stop, and unloading of a test piece of the material are repeated at a quasi-static strain rate, true stress of the test piece every stop is calculated (S21), and true strain of the test piece every stop or unloading is calculated (S22). Counting values k₁ and k₂ of numerical expression (1) showing the true stress - true strain curve are calculated based on the calculated true stress and true strain (S25), strain amount ε^P is substituted into the numerical expression (1) including k₁ and k₂ and fluid stress σ_S corresponding to the amount ε^P is calculated (S25), and stress σ corresponding to the strain ε^P in the whole total strain zone and at an arbitrary strain rate is calculated by substitution of the fluid stress σ_S into the numerical expression (3) and employment of a parameter of the numerical expression (3) (S26).;COPYRIGHT: (C)2008,JPO&INPIT