Stress intensity factors for surface cracks in single‐edge notch bend specimen by a three‐dimensional weight function method

Publisher： John Wiley & Sons Inc

E-ISSN： 1460-2695|39|11|1407-1418

ISSN： 8756-758x

Source： FATIGUE & FRACTURE OF ENGINEERING MATERIALS AND STRUCTURES, Vol.39, Iss.11, 2016-11, pp. : 1407-1418

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Abstract

AbstractStress intensity factors for half‐elliptical surface cracks at a semi‐circular notch in a recently developed single‐edge notch bend specimen are determined for a wide range of geometrical parameters using a three‐dimensional weight function method. Two load cases of pin loading and uniform remote tension are considered. The results are in good agreement with abaqus/franc3d finite element analysis. It is found that the Ziegler–Newman engineering similitude approach (programmed into the Fatigue Crack Growth Structural Analysis life‐prediction code) produces good results for a wide range in a/c ratios. Expressions by multi‐variable curve fitting to the weight function results are presented for easy engineering applications.