WIT Press


The Unified Implicit Elasto-viscoplastic Algorithm For BEM Analysis

Price

Free (open access)

Paper DOI

10.2495/BE960351

Volume

14

Pages

10

Published

1996

Size

700 kb

Author(s)

Y. Liu & H. Antes

Abstract

In elasto-viscoplastic analysis, the use of implicit time integration techniques is advantageous or even unavoidable. This paper, in terms of previous elasto- viscoplastic FEM and BEM research work, presents a unified implicit viscoplastic algorithm for non-linear BEM. The related expressions are proposed for the implicit analysis in a general material model governed by Tresca's, Von-Mises's, Mohr-Coulomb's, Drucker-Prager's, Zienkiewicz-Pande's (ellipse and hyperbola types) yield criteria. A unified formula of the viscoplastic strain rate matrix H is developed in a form which is particularly suitable for BEM implicit algorithm. Use of the implicit elasto-viscoplastic algorithm is illustrated by the solutions of numerical examples. 1. Introduction The increasing demand for integrity and

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