The Dynamic Energy Release Rate for Two Parallel Steadily Propagating Mode III Cracks in a Viscoelastic Body

Abstract

The dynamic steady state propagation of two parallel semi-infinite, mode III cracks is considered for a general, infinite, homogeneous, isotropic linearly viscoelastic body. A Barenblatt type failure zone is introduced in order to cancel the singular stress and a formula for the energy release rate is derived which provides immediate comparisons with the corresponding single crack problem. The influence of crack speed, crack separation, and material properties upon the energy release rate are illustrated with numerical calculations for both power-law material and a standard linear solid. Keywords: viscoelasticity; dynamic fracture; dynamic energy release rate; Barenblatt zone; crack growth.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1986
Accession Number
ADA175191

Entities

People

  • J. R. Walton
  • L. Schovanec

Organizations

  • Texas A&M University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Boundary Value Problems
  • Classification
  • Contracts
  • Crack Propagation
  • Crack Tips
  • Cracks
  • Differential Equations
  • Equations
  • Mechanics
  • Military Research
  • Secondary Waves
  • Security
  • Shear Modulus
  • Standards
  • Steady State
  • Stress Intensity Factors
  • Stresses

Readers

  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Materials Science (Mechanical Engineering).