WIT Press


Improved Numerical Integration Of Elastic-viscoplastic Models With Hardening And Rate-dependence In AUTODYN

Price

Free (open access)

Paper DOI

10.2495/SU020441

Volume

63

Pages

10

Published

2002

Size

436 kb

Author(s)

O Yu Vorobiev

Abstract

This paper presents a new integration technique implemented in AUTODYN for a wide class of elastic-viscoplastic materials with plastic strain hardening and rate dependence. A modified explicit integration scheme has shown to eliminate unstable behavior for materials with stiff strain hardening and rate-sensitivity. It can also be used as a trial step for more complicated implicit schemes. Results of test calculations are shown for widely used Johnson-Cook and Zerilli-Armstrong strength models.

Keywords