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.Full text not available from this repository.
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|
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