Remarks on the energy release rate for an antiplane moving crack in couple stress elasticity

L. Morini*, A. Piccolroaz, G. Mishuris

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

27 Citations (SciVal)
133 Downloads (Pure)

Abstract

This paper is concerned with the steady-state propagation of an antiplane semi-infinite crack in couple stress elastic materials. A distributed loading applied at the crack faces and moving with the same velocity of the crack tip is considered, and the influence of the loading profile variations and microstructural effects on the dynamic energy release rate is investigated. The behavior of both energy release rate and maximum total shear stress when the crack tip speed approaches the critical speed (either that of the shear waves or that of the localized surface waves) is studied. The limit case corresponding to vanishing characteristic scale lengths is addressed both numerically and analytically by means of a comparison with classical elasticity results. (C) 2014 Elsevier Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)3087-3100
Number of pages14
JournalInternational Journal of Solids and Structures
Volume51
Issue number18
Early online date15 May 2014
DOIs
Publication statusPublished - Sept 2014

Keywords

  • Couple stress elasticity
  • Energy release rate
  • Couple stress surface waves
  • Shielding e ffects
  • Weakening effects
  • MODE-III CRACK
  • HETEROGENEOUS MATERIALS
  • GRADIENT ELASTICITY
  • INTENSITY FACTORS
  • FRACTURE ENERGY
  • SIZE
  • DEPENDENCE
  • SOLIDS
  • WAVES

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