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Engineering Review : International journal for publishing of original researches from the aspect of structural analysis, materials and new technologies in the field of mechanical engineering, shipbuilding, fundamental engineering sciences, computer sciences, electrical engin, Vol. 31 No. 2, 2011.

Original scientific paper

J-integral as possible criterion in material fracture toughness assessment

Goran Vukelić ; Faculty of engineering, University of Rijeka, Rijeka, Croatia
Josip Brnić ; Faculty of engineering, University of Rijeka, Rijeka, Croatia

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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 (Δa) for three initial measures of specimen's crack size, a/W = 0.25, 0.5, 0.75.

Keywords

J-integral; CT specimen; Fracture; Crack growth; FE analysis

Hrčak ID:

74926

URI

https://hrcak.srce.hr/74926

Publication date:

12.12.2011.

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