Abstract
THE concept of the stress intensity factor K has proved particularly useful in the study of opening mode crack growth problems where the nominal stress level is well below the yield stress of the material. Closed-form solutions for stress intensity factors can be obtained by analytical methods, but these are limited to a few restricted cases. Computer programs, based either on the boundary collocation of a stress function or on complex variable mapping methods, have been used to obtain the opening mode stress intensity factor K1 for various two-dimensional geometries1. Semi-empirical methods have also been proposed2. There is, however, still a need for a general method, with a sound theoretical basis, for calculating K1 for cracks in bodies of arbitrary shape.
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References
Brown, W. F., and Srawley, J. E., ASTM STP 410 (American Society for Testing and Materials, Philadelphia, 1966).
Williams, J. G., and Isherwood, D. P., J. Strain Anal., 3(1), 17 (1968).
Paris, P. C., and Sih, G. C., ASTM STP 381 (American Society for Testing and Materials, Philadelphia, 1965).
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DIXON, J., POOK, L. Stress intensity Factors calculated generally by the Finite Element Technique. Nature 224, 166–167 (1969). https://doi.org/10.1038/224166a0
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DOI: https://doi.org/10.1038/224166a0
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