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Modified crack closure integral (MCCI) for 3-d problems using 20 noded brick elememnts

Narayana, KB and George, S and Dattaguru, B and Ramamurthy, TS and Vijayakumar, K (1994) Modified crack closure integral (MCCI) for 3-d problems using 20 noded brick elememnts. In: Fatigue and Fracture of Engineering Materials and Structures, 17 (2). pp. 145-157.

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Official URL: http://onlinelibrary.wiley.com/doi/10.1111/j.1460-...

Abstract

The Modified Crack Closure Integral (MCCI) technique based on Irwin's crack closure integral concept is very effective for estimation of strain energy release rates G in individual as well as mixed-mode configurations in linear elastic fracture mechanics problems. In a finite element approach, MCCI can be evaluated in the post-processing stage in terms of nodal forces and displacements near the crack tip. The MCCI expressions are however, element dependent and require a systematic derivation using stress and displacement distributions in the crack tip elements. Earlier a general procedure was proposed by the present authors for the derivation of MCCI expressions for 3-dimensional (3-d) crack problems modelled with 8-noded brick elements. A concept of sub-area integration was proposed to estimate strain energy release rates at a large number of points along the crack front. In the present paper a similar procedure is adopted for the derivation of MCCI expressions for 3-d cracks modelled with 20-noded brick elements. Numerical results are presented for centre crack tension and edge crack shear specimens in thick slabs, showing a comparison between present results and those available in the literature.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to John wiley and sons.
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering (Formerly, Aeronautical Engineering)
Date Deposited: 11 Apr 2011 13:24
Last Modified: 11 Apr 2011 13:24
URI: http://eprints.iisc.ernet.in/id/eprint/36649

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