Numerical method of determining creep model parameters within the first two stages of creep

Abstract

The article describes a new numerical method for determining the parameters of a creep model within the first two stages of creep. The numerical method is based on the transition from a nonlinear model of creep to a linear-parametric discrete model. The linear-parametric discrete model describes the sequence of experimental values of creep deformation. The formulas describing the relationship between the coefficients of the linear parametric discrete model and the parameters of the reference creep model are presented. We propose an iterative procedure of RMS estimation of the coefficients of the linear parametric discrete model. The developed numerical method was tested in the estimation of parameters of a creep model, and the validity of the relationships obtained was confirmed.