Nonhomogenized Displacement Discontinuity Method for Calculation of Stress Intensity Factors for Cracks in Anisotropic FGMs
Publication: Journal of Engineering Mechanics
Volume 140, Issue 12
Abstract
A numerical method is proposed for calculation of the mixed-mode stress intensity factors at a crack tip in anisotropic functionally graded materials (FGMs). The method is constructed by introducing the nonhomogenized displacement discontinuities technique. With this method, the stress intensity factors can be effectively determined by direct use of the finite-element results of the near-tip displacement discontinuities across the crack surfaces. The result from the proposed method can also be used as an effective indicator for evaluating the accuracy of the calculation. This proposed approach is applicable for problems containing curved cracks of arbitrary shape in general anisotropic FGMs.
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Acknowledgments
This work has been partially supported by National Science Council Grant No. NSC101-2221-E-008-076 to National Central University.
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© 2014 American Society of Civil Engineers.
History
Received: Sep 9, 2013
Accepted: Mar 26, 2014
Published online: May 9, 2014
Discussion open until: Oct 9, 2014
Published in print: Dec 1, 2014
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