A Dissipation Gap Method for full-field measurement-based identification of elasto-plastic material parameters

Benoît Blaysat, Éric Florentin, Gilles Lubineau, Ali Moussawi

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

Using enriched data such as displacement fields obtained from digital image correlation is a pathway to the local identification of material parameters. Up to now, most of the identification techniques for nonlinear models are based on Finite Element Updating Methods. This article explains how an appropriate use of the Dissipation Gap Method can help in this context and be an interesting alternative to these classical techniques. The Dissipation Gap Methods rely on the concept of error in dissipation that has been used mainly for the verification of finite element simulations. We provide here an original application of these founding developments to the identification of material parameters for nonlinear behaviors. The proposed technique and especially the main technical keypoint of building the admissible fields are described in detail. The approach is then illustrated through the identification of heterogeneous isotropic elasto-plastic properties. The basic numerical features highlighted through these simple examples demonstrate this approach to be a promising tool for nonlinear identification. © 2012 John Wiley & Sons, Ltd.
Original languageEnglish (US)
Pages (from-to)685-704
Number of pages20
JournalInternational Journal for Numerical Methods in Engineering
Volume91
Issue number7
DOIs
StatePublished - May 18 2012

ASJC Scopus subject areas

  • Applied Mathematics
  • Engineering(all)
  • Numerical Analysis

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