DISCUSSION ON THE PAPER "A NOTE ON THE CRACK-PLANE STRESS FIELD METHOD FOR ANALYSING SIFs AND ITS APPLICATION TO A CONCENTRIC PENNY-SHAPED CRACK IN A CIRCULAR CYLINDER OPENED UP BY CONSTANT PRESSURE" by Wang Qizhi*
نویسنده
چکیده
Recently my attention has been drawn to the above-mentioned article in which Dr. Qizhi employed the so-called section method for deriving an approximate analytical expression for the SIF for a penny-shaped crack in an inf'mitely long cylinder subjected to uniform axial load. The method is widely used in problems of structural mechanics. Probably Parton and Morozov first employed this method in fracture mechanics. However, subsequent development of the method is largely due to Borodachev and Kuli who demonstrated the effectiveness of the method in many elastostatic crack problems. In particular, these authors employed this method for deriving approximate analytical expressions for the SIFs for two arbitrarily located cracks, a penny-shaped crack, an external circular crack in isotropic as well as anisotropic bodies for all three modes. The basic reults in this direction are summarised in their paper [1].
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