Stress Intensity Factors for Elliptical Cracks
Interim technical rept. no. 2
WASHINGTON UNIV SEATTLE DEPT OF MECHANICAL ENGINEERING
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The combined use of a solution for an elliptical crack subjected to a polynomial distribution of internal pressure together with a free surface solution for the alternating method is reviewed in order to improve the efficiency of this numerical technique. Numerical differentiation to avoid deriving and computer programming of complex mathematical expressions is discussed. A criterion for maximum grid size for the free surface solution is proposed. Also optimum fittings of the first, second and third order polynomial distributions of internal pressure are considered.