The energy release rate for a quasi-static mode I crack in a nonhomogeneous linearly viscoelastic body

L. Schovanec, J. R. Walton

Research output: Contribution to journalArticle

14 Scopus citations

Abstract

The Energy Release Rate (ERR) for the quasi-static problem of a semi-infinite mode I crack propagating through an inhomogeneous isotropic linearly viscoelastic body is examined. The shear modulus is assumed to have a power-law dependence on depth from the plane of the crack and a very general behavior in time. A Barenblatt type failure zone is introduced in order to cancel the singular stress and a formula for the ERR is derived which explicitly displays the combined influences of material viscoelasticity and inhomogeneity. The ERR is calculated for both power-law material and the standard linear solid and the qualitative features of the ERR are presented along with numerical illustrations.

Original languageEnglish
Pages (from-to)445-454
Number of pages10
JournalEngineering Fracture Mechanics
Volume28
Issue number4
DOIs
StatePublished - 1987

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