Computation of plane crack stress intensity factors using trigonometric wavelet finite element method

W. Y. He, W. X. Ren, Z. J. Yang

    Research output: Contribution to journalArticlepeer-review

    Abstract

    The trigonometric wavelet has both good approximation characteristics of trigonometric function and multi-resolution, local characteristics of wavelet. It is used in this study as interpolation functions in the finite element (FE) method. FE formulations for elastic plane problems are derived based on the principle of minimum potential energy. Stress intensity factors of plane stress problems with cracks are computed based on the displacement extrapolation technique. The wavelet hierarchical and multi-resolution approaches are also used to improve accuracy of calculations. Numerical examples have shown that the proposed trigonometric wavelet finite element formulations are effective for computing the stress intensity factors with a small number of elements. Both wavelet hierarchical and wavelet multi-resolution methods lead to improved computational accuracy. They can be selected according to the problems to be solved. © 2011 Blackwell Publishing Ltd.
    Original languageEnglish
    Pages (from-to)732-741
    Number of pages9
    JournalFatigue and Fracture of Engineering Materials and Structures
    Volume35
    Issue number8
    DOIs
    Publication statusPublished - Aug 2012

    Keywords

    • hierarchical
    • multi-resolution
    • singularity
    • stress intensity factors
    • trigonometric wavelet

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