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Title: A new displacement-based approach to calculate stress intensity factors with the boundary element method
Authors: Gonzalez, M
Teixeira, P
Wrobel, LC
Martinez, M
Keywords: Boundary Element Method;Stress intensity factors;Displacement techniques;J-integral
Issue Date: 2015
Publisher: Brazilian Association of Computational Mechanics
Citation: Latin American Journal of Solids and Structures, 12(9), pp. 1677 - 1697, (2015)
Abstract: The analysis of cracked brittle mechanical components considering linear elastic fracture mechanics is usually reduced to the evaluation of stress intensity factors (SIFs). The SIF calculation can be carried out experimentally, theoretically or numerically. Each methodology has its own advantages but the use of numerical methods has be-come very popular. Several schemes for numerical SIF calculations have been developed, the J-integral method being one of the most widely used because of its energy-like formulation. Additionally, some variations of the J-integral method, such as displacement-based methods, are also becoming popular due to their simplicity. In this work, a simple displacement-based scheme is proposed to calculate SIFs, and its performance is compared with contour integrals. These schemes are all implemented with the Boundary Element Method (BEM) in order to exploit its advantages in crack growth modelling. Some simple examples are solved with the BEM and the calculated SIF values are compared against available solutions, showing good agreement between the different schemes.
ISSN: 1679-7817
Appears in Collections:Dept of Mechanical Aerospace and Civil Engineering Research Papers

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