Topic
Paris' law
About: Paris' law is a research topic. Over the lifetime, 13815 publications have been published within this topic receiving 224818 citations. The topic is also known as: Paris-Erdogan law.
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TL;DR: In this article, the crack growth rate is evaluated for each load cycle using a modification of the fracture mechanics correlation technique and the relationship for r, is termed the "fatigue crack growth-rate interaction model".
114 citations
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TL;DR: In this article, Fatigue crack growth experiments were carried out on sheet specimens of the Russian alloy D16Cz (Al-Cu-Mg alloy) and constant-amplitude tests were performed at different stress ratios.
113 citations
06 Feb 2013
TL;DR: In this article, the authors investigated the effect of hydrogen on fatigue crack growth behavior, including measurement of the hydrogen content in various materials such as low carbon, Cr-Mo and stainless steels.
Abstract: Abstract The present paper shows several important phenomena obtained by investigations of the effect of hydrogen on fatigue crack growth behaviour, including the measurement of the hydrogen content in various materials such as low-carbon, Cr–Mo and stainless steels. Particularly important phenomena are the localization of fatigue slip bands, strain-induced martensite in Types 304, 316 and even 316L, and also strong frequency effects on fatigue crack growth rates. For example, with a decrease in frequency of fatigue loading down to the level of 0.2 Hz, the fatigue crack growth rate of a Cr–Mo steel is accelerated by 10–30 times. The same phenomenon also occurs even in austenitic stainless steels at the frequency of the level of 0.001 Hz. Striation morphology is also influenced by hydrogen. It has been revealed by re-analysing the results of the authors’ separately published reports that this basic hydrogen embrittlement mechanism is essentially the same throughout all the materials, i.e. low-carbon, Cr–Mo and stainless steels. Thus, the coupled effects of hydrogen content, hydrogen diffusion coefficient (for BCC or FCC), load frequency, localization of fatigue slip bands and strain-induced martensite must be always considered in fatigue test and analysis of hydrogen embrittlement.
113 citations
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TL;DR: In this article, a model which describes the microstructurally short and physically short crack periods of fatigue crack growth is presented and compared with the prediction of fatigue life based on a previously reported two-equation approach.
Abstract: — A brief outline of a recently developed model which describes the microstructurally short and the physically short crack periods of fatigue crack growth is presented. A single equation to describe both regimes is discussed and the model applied to data on a medium carbon steel. Good predictions relating to the actual experimental lifetime were achieved. The results are compared with the prediction of fatigue life based on a previously reported two-equation approach.
113 citations