J-integral as possible criterion in material fracture toughness assessment

Authors

  • Goran Vukelić
  • Josip Brnić

Abstract

Numerical fracture toughness assessment of two types of steel, AISI 420 and AISI 431, has been conducted in this paper. The J-integral is chosen as a criterion for fracture behaviour comparison of compact type (CT) specimens made of investigated materials. The values of J-integral are determined through a newly developed algorithm using finite element (FE) stress analysis results of numerically simulated single specimen test method, which is usually employed for experimental J-integral assessment. J-integral values are presented in dependence on specimen crack growth size (?a) for three initial measures of specimen\'s crack size, a/W = 0.25, 0.5, 0.75.

Author Biographies

Goran Vukelić

Faculty of engineering, University of Rijeka, Rijeka, Croatia

Josip Brnić

Faculty of engineering, University of Rijeka, Rijeka, Croatia

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Published

2011-12-15

Issue

Engineering Review Vol 31. No. 2

Section

Articles

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