A single yield surface damage plasticity model incorporating pressure and strain rate dependency

M. Mukherjee, G. D. Nguyen, A. Mir, H. H. Bui, L. Shen, A. El-Zein, F. Maggi

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther

Abstract

A new single surface damage plasticity model has been proposed for concrete and rocks incorporating the influence of both pressure and strain rate. A combined yield-failure function has been employed in the formulation which transforms from an initial yield surface to a final linear frictional failure surface in stress space with the evolution of damage, defined as a function of the rate of accumulated plastic strain. Such unified formulation eliminates the need for multiple loading surfaces, and automatically captures the brittle/softening and ductile/hardening responses and their transition, with increasing confining pressure and strain rate, without requiring explicit softening/ hardening rule. A Perzyna type non-associative flow rule has been employed in order to incorporate the rate-dependent behaviour of the pressure sensitive materials. Furthermore, the proposed model takes the micro-crack closure effects into account when switching from tensile to compressive loading. Comparison against experimental results highlights the promising features of the model in predicting complex behaviour of rocks and concrete under different loading conditions.

Original languageEnglish
Title of host publication9th Australasian Congress on Applied Mechanics, ACAM 2017
PublisherNational Committee on Applied Mechanics
ISBN (Electronic)9781925627022
Publication statusPublished - 1 Jan 2017
EventAustralasian Congress on Applied Mechanics 2017 - University of New South Wales, Sydney, Australia
Duration: 27 Nov 201729 Nov 2017
Conference number: 9th
https://acam9.com.au/

Publication series

Name9th Australasian Congress on Applied Mechanics, ACAM 2017
Volume2017-November

Conference

ConferenceAustralasian Congress on Applied Mechanics 2017
Abbreviated titleACAM 2017
CountryAustralia
CitySydney
Period27/11/1729/11/17
Internet address

Keywords

  • Concrete
  • Damage
  • Plasticity
  • Pressure-dependent
  • Rate-dependent
  • Rock

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