Multiresolution continuum modeling of micro-void assisted dynamic adiabatic shear band propagation

Cahal McVeigh, Wing Kam Liu*

*Corresponding author for this work

Research output: Contribution to journalArticle

35 Scopus citations

Abstract

A thermal-mechanical multiresolution continuum theory is applied within a finite element framework to model the initiation and propagation of dynamic shear bands in a steel alloy. The shear instability and subsequent stress collapse, which are responsible for dynamic adiabatic shear band propagation, are captured by including the effects of shear driven microvoid damage in a single constitutive model. The shear band width during propagation is controlled via a combination of thermal conductance and an embedded evolving length scale parameter present in the multiresolution continuum formulation. In particular, as the material reaches a shear instability and begins to soften, the dominant length scale parameter (and hence shear band width) transitions from the alloy grain size to the spacing between micro-voids. Emphasis is placed on modeling stress collapse due to micro-void damage while simultaneously capturing the appropriate scale of inhomogeneous deformation. The goal is to assist in the microscale optimization of alloys which are susceptible to shear band failure.

Original languageEnglish (US)
Pages (from-to)187-205
Number of pages19
JournalJournal of the Mechanics and Physics of Solids
Volume58
Issue number2
DOIs
StatePublished - Feb 1 2010

Keywords

  • Constitutive behaviour
  • Dynamic fracture
  • Finite elements
  • Thermomechanical process
  • Voids and inclusions

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Fingerprint Dive into the research topics of 'Multiresolution continuum modeling of micro-void assisted dynamic adiabatic shear band propagation'. Together they form a unique fingerprint.

Cite this