Submitted to Engineering Fracture Mechanics IMPROVED QUARTER-POINT CRACK TIP ELEMENT
نویسندگان
چکیده
We present a modi cation to the quarter-point crack tip element and employ this element in two-dimensional boundary integral fracture analysis. The standard singular element is adjusted so that the near-tip crack opening displacement satis es a known constraint: the coe cient of the term which is linear in the distance to the tip must vanish. Stress intensity factors calculated with the Displacement Correlation Technique are shown to be highly accurate, and signi cantly more accurate than with the standard element. The improvements are especially dramatic for mixed-mode problems involving curved and interacting cracks.
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