Numerical Analyses of Dynamic Crack Propagation in Visco-Plastic Solids Using Path Independent Integral, T

Shinobu Yoshimura, Genki Yagawa, Satya N. Atluri

Research output: Contribution to journalArticle

Abstract

This paper presents the numerical analyses of dynamic crack propagation in visco-plastic solids. A tangent modulus formulation based on σyd=h(∊up, ∊up) is used to take into account visco-plasticity A linear relaxation technique of nodal forces is also employed for the modeling ot continuous dynamic crack propagation. The fracture mechanics parameter calculated here is a path independent integral, T, which is applicable to both quasi-static and dynamic fracture phenomena of non-linear materials. First, a parametric calculation of dynamic crack propagation at a constant velocity in a visco-plastic solid is performed to investigate the high-strain-rate effects on the 1 integral and the stress-strain fields near the crack tip. Secondly, a generation phase calculation of an experiment performed by Brickstad is carried out to obtain a relationship between a fracture toughness and a crack velocity.

Original languageEnglish
Pages (from-to)212-217
Number of pages6
JournalTransactions of the Japan Society of Mechanical Engineers Series A
Volume54
Issue number498
DOIs
StatePublished - 1988

Keywords

  • Crack Velocity
  • Dynamic Crack Propagation
  • Fracture Toughness
  • Nodal Release Technique
  • Strain-Rate Effect
  • T Integral
  • Visco-Plasticity

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