Propagation of Crack in Linear Elastic Materials with Considering Crack Path Correction Factor

Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering

مقاله 5، دوره 1، شماره 3، آذر 2008، صفحه 49-58   

نوع مقاله: Persian

نویسندگان

M. Moradi^{* 1}؛ M. Pourmahmoud²

¹Assistant Professor, Mechanical Engineering Department, Isfahan University of Technology

²M.Sc., Mechanical Engineering Department, Isfahan University of Technology

چکیده

Modeling of crack propagation by a finite element method under mixed mode conditions is of prime importance in the fracture mechanics. This article describes an application of finite element method to the analysis of mixed mode crack growth in linear elastic fracture mechanics. Crack - growth process is simulated by an incremental crack-extension analysis based on the maximum principal stress criterion which is expressed in terms of the stress intensity factor. In this paper a procedure is employed to correct direction of crack propagation to ensure that a unique final crack path is achieved for different analysis of a problem by using different increments of crack. For each increment of crack extension, finite element method is applied to perform a single - region stress analysis of the cracked structure. Results of this incremental crack – extension analysis are presented for several geometries.

کلیدواژه‌ها

Finite Element؛ Crack propagation criteria؛ Crack propagation path؛ Crack path correction angle

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