Digitale Medien
Oxford, UK
:
Blackwell Publishing Ltd
Fatigue & fracture of engineering materials & structures
6 (1983), S. 0
ISSN:
1460-2695
Quelle:
Blackwell Publishing Journal Backfiles 1879-2005
Thema:
Maschinenbau
Notizen:
Abstract— Sharply notched specimens of a structural low-carbon steel were fatigued under several ratios of the maximum to minimum loads. The growth behavior of a short fatigue crack near the notch tip was analyzed based on crack closure measurements. A fatigue crack first decelerates with increasing crack length, and then accelerates or becomes non-propagating depending on the applied stress. A similar deceleration is seen when the rate is correlated to the stress intensity range. The effective stress intensity range is a unique parameter in correlating the growth rate of a short crack for all the stress levels examined, and the relation is identical to that obtained for a long crack. By considering the increase in crack closure with crack length, a quantitative method is proposed for predicting the non-propagating crack length and the fatigue limit of notched specimens as a function of the applied stress and the notch geometry.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1111/j.1460-2695.1983.tb00347.x
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