• development of decoupled equations method to calculate stress intensity factors in 2d problems

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1393/11/01
    • تاریخ انتشار در تی پی بین: 1393/11/01
    • تعداد بازدید: 548
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     this study presents a novel application of the decoupled equations method (dem) to model crack issues. accurate stress intensity factors (sifs) based on linear elastic fracture mechanics (lefm) are directly computed using the dem, which is based on stress redistribution. however, in fracture mechanics (e.g., crack issue) problems, the concept of redistribution is not applicable, due to infinite stress in the crack tip. to overcome this problem, an analytical function is proposed to represent infinite stress in crack tip, so redistribution concept may be applied. consequently, when the local coordinates origin (lco) is located at the crack tip, sifs can be determined directly without further processing, in which to present infinite stress in crack tip, a new body force function is proposed. validity and accuracy of this method is fully demonstrated through a benchmark problem which is successfully modeled using a few numbers of degrees of freedom. the numerical results agree very well with the results from existing numerical methods available in literature.

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