Identification of Phenomenological Superplasticity Models Based on the Results of Technological Experiments

Abstract

A general scheme for identifying the constitutive equations of superplasticity, according to which the values of material constants are calculated by the results of technological experiments using interpretation techniques based on the adoption of additional hypotheses of the stress-strain state nature in the deformation region, is proposed. The verification of the result is carried out by comparing the experimental data with the corresponding solutions of the boundary problems for superplasticity mechanics obtained using software complexes such as ANSYS and ABAQUS. The obtained result is used as input data for a program, and the solution of the boundary value problem is found without additional hypotheses of the stress-strain state nature. The practical application of the proposed approach for the standard power model of superplasticity shows that the accuracy of the forming duration simulation is no less than 4%.