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Measurement of Crack-Tip Stress Distributions by X-Ray Diffraction Pages: 13 Published: Jan 1979
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View License Agreement Crack-tip stress distributions were measured on the surface of fatigue-cracked specimens of 1045 steel using a semiautomatic X-ray diffraction technique. The influence of overload cycles and crack extension on crack-tip stress profiles was studied. These overload-influenced stress profiles were observed to follow current analytical models generally. Overload cycles were shown to have a strong effect on subsequent residual and applied stress profiles. It was deduced that overload-induced crack-tip residual stresses are tensile on the interior of the specimen, the implication being that crack growth retardation may thus be a surface related phenomenon. Crack tip applied stresses were also measured and were found to be consistent with simple models for the crack tip applied stress profile. | ||
