Extraction of Stress Intensity Factors for the Simulation of 3-D Crack Growth with the Generalized Finite Element Method

Abstract:

Two methods for the extraction of Stress Intensity Factors (SIFs) from three-dimensional (3-D)problems are presented: the Contour Integral Method and the Cutoff Function Method. The formula-tions are tailored for the Generalized Finite ElementMethod andmixed-mode 3-D propagating cracks.The case of crack faces loaded by prescribed tractions is also considered. Another contribution of thispaper is a procedure to control the noise of extracted SIFs based on theMoving Least SquaresMethod.The proposed approach provides a continuous and smooth approximation of 3-D SIF functions foreach fracture mode. Numerical experiments demonstrating the accuracy and robustness of the pro-posed methodology are presented. They include 3-D mixed-mode fatigue crack growth simulationsand the case of a pressurized crack.

• Periodical: Key Engineering Materials (Volume 560)
• Pages: 1-36
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.560.1
• Online since: July 2013
• Authors: J. Garzon, C.A. Duarte, J.P. Pereira
• Keywords: Contour Integral Method, Extended Finite Element Method (XFEM), Fracture Propagation, Generalized Finite Element Method, Stress Intensity Factor (SIF)

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