Geometrically non-linear modeling of the plc effect

T. Böhlke, G. Bondár, Y. Estrin, M. A. Lebyodkin

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Abstract

In this work we investigate the plastic instabilities associated with the Portevin-Le Chatelier (PLC) effect in Al alloy 2024. A semi-phenomenological approach is taken. A simple geometrically non-linear elastic-viscoplastic constitutive model is proposed for simulation of material response under various applied strain rates. Using the model we determine numerically the relation between the critical strain for the onset of discontinuous yielding and the applied strain rate.

Original languageEnglish
Title of host publicationComputational Plasticity X - Fundamentals and Applications
Publication statusPublished - 2009
EventInternational Conference on Computational Plasticity 2009 - Barcelona, Spain
Duration: 2 Sep 20094 Sep 2009
Conference number: 10th

Conference

ConferenceInternational Conference on Computational Plasticity 2009
Abbreviated titleCOMPLAS X
CountrySpain
CityBarcelona
Period2/09/094/09/09

Keywords

  • Dynamic strain aging
  • Jerky flow
  • Non-linear finite element method
  • Normal and inverse behaviour
  • Plastic instability

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