Improved Extend Finite Element Method for SIF Calculation

Abstract:

Fatigue is the most common failure mechanisms in many engineering structures with inherent defects under variable amplitude loading, Such as lifting structures, airplanes, bridges and so on have to endure for a long term cycle loadings in the actual service. For such structures, fatigue life is dominantly predicted by crack growth analysis, using the stress intensity factor range. In this paper, an improved extend finite element method is proposed for stress intensity factor calculation, which can overcome the limitation of the level set method in judge the element types. Numerical experiment is provided to demonstrate the utility and robustness of the proposed method.

• Periodical: Advanced Materials Research (Volumes 690-693)
• Pages: 1728-1731
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.690-693.1728
• Online since: May 2013
• Authors: Nian Li Lu, Wei Gang Zhan
• Keywords: Enrich Element, Extend Finite Element Method, Level Set Method, Stress Intensity Factor (SIF)

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