Heating at a Propagating Crack Tip in a Viscoplastic Material.

Abstract

The crack tip temperature due to near-tip dissipation of mechanical energy has been calculated for a crack propagating in a viscoplastic material. The mechanical behavior of the material was represented by a model proposed by Bodner and Partom. On the basis of the adiabatic approximation the maximum temperature has been investigated as a function of the crack-tip speed and the material parameters. For a specific crack-tip speed, T sub max is displayed as a function of the material constant, D sub o which defines the asymptotic limit of the inelastic strain rate as the stress level increases. The maximum temperature increases with increasing values of D sub o. Keywords: Mathematical models; Computations.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1987
Accession Number
ADA190952

Entities

People

  • J. C. Sung
  • Jan D. Achenbach

Organizations

  • Northwestern University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Constitutive Equations
  • Coordinate Systems
  • Crack Tips
  • Cracks
  • Diffusivity
  • Dissipation
  • Energy
  • Equations
  • Mechanical Energy
  • Mechanical Phenomena
  • Mechanical Properties
  • Mechanics
  • Military Research
  • Strain Rate
  • Stress Intensity Factors
  • Stresses
  • Thermal Diffusivity

Readers

  • Approximation Theory.
  • Materials Science (Mechanical Engineering).