- STRESS-STRAIN RELATIONSHIP SIMULATION METHOD SPRING BACK PREDICTION METHOD AND SPRING BACK ANALYZING DEVICE

摘要

Strain of the elasto-plastic material is subjected to plastic deformation by imparting a displacement or load to the elastoplastic material to obtain an experimental value of the stress-strain relationship, and the calculator calculates a moving hardened incremental vector of the yield curve in the elastomeric constitutive formula defined as a function of stress and rear stress dα _ij , the material constants included in the elastoplastic composition are identified by using the obtained experimental values, and the obtained first formula and the obtained experimental values are compared with each other. And the stress-strain relationship of the elastoplastic material is determined using these predetermined first equations, predetermined second equations, and the elastoplastic composition, to which the identified material constants are substituted, Simulate strain relationships.