Volume 14, Issue 5 (8-2014)                   Modares Mechanical Engineering 2014, 14(5): 91-101 | Back to browse issues page

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Abbaszadeh Bidokhti A, Shahani A R. Study and Analysis of Alignment and Combination Rules for Offset Cracks. Modares Mechanical Engineering. 2014; 14 (5) :91-101
URL: http://mme.modares.ac.ir/article-15-12384-en.html
1- K.N. Toosi University of Technology, Tehran, Iran
Abstract:   (3684 Views)
Multiple flaws are frequently occurred in actual components, such as pressure vessels and power plants. These flaws will in some circumstances lead to more severe effects than single flaw alone. Assessment of the interaction behaviour is based on an evaluation of the alignment and combination of these multiple flaws. In the current standards, multiple cracks are treated as an equivalent single crack if the distance between two cracks satisfies a prescribed criterion. First, this study introduces the current alignment and combination rules for through cracks. Following, to investigate the effects of the interaction of cracks, brittle fracture of a plate containig two adjacent cracks is simulated. The effect of cracks distances and crack lengths on stress intensity factors is evaluated. Also, crack growth analysis is simulated based on linear elastic fracture mechanics approach. The extended finite element method has been utilized to model the problem. This method enables the domain to be modeled by finite elements without explicitly meshing the crack surfaces, and hence crack propagation simulations can be carried out without remeshing. Based on the results, a new alignment and combination rule is proposed.
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Article Type: Research Article | Subject: Creep, Fatigue & Failure|Finite Elements Method
Received: 2013/10/19 | Accepted: 2013/11/19 | Published: 2014/06/21

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