Bodner-Partom Viscoplastic Model in STEALTH Finite Difference Code

摘要

Most of the state of the art finite difference codes are still incapable of describing strain rate and loading history dependent plastic flow behaviors in metals. The main objective of our work was to develop a computational algorithm for describing viscoplastic constitutive model in a finite difference code. A subincremental time stepping, iterative numerical scheme was used to describe Bodner Partom viscoplastic model in the STEALTH finite difference code. Several special purpose subroutines were developed and incorporated into the code. The new routines were validated by comparing the solutions obtained for several model problems with the already available solutions of those problems. This report also describes in detail the input preparations for the Bodner Partom model and the flowcharts associated with the numerical algorithms.