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, a stochastic model was proposed to explain the moderate scatter observed in mid-range ΔK tests, which is also likely to be useful for understanding the large scatter in small crack tests.
59 citations
TL;DR: In this paper, the results of a round-robin life-prediction effort conducted by ASTM Task Group E24.04.04 on FCGR Descriptions are presented.
Abstract: This report presents the results of a round-robin life-prediction effort conducted by ASTM Task Group E24.04.04 on FCGR Descriptions. The fatigue crack growth rate (FCGR) data supplied to the task group participants for description purposes are provided along with the definition of the life-prediction effort and results. It is shown that the majority of the participants could describe the FCGR data well enough that the resulting constant amplitude life predictions were within ′20 percent of the test lives for more than 80 percent of the tests.
59 citations
01 Jan 2013-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this paper, the role of microstructure types in fatigue crack growth behaviors in ferrite-pearlite steel and ferrite bainite steel was investigated using in-situ scanning electron microscopy (SEM) and fatigue fractography analysis.
Abstract: The roles of microstructure types in fatigue crack growth behaviors in ferrite–pearlite steel and ferrite–bainite steel were investigated. The ferrite–bainite dual-phase microstructure was obtained by intermediate heat treatment, conducted on ferrite–pearlite hot-rolled low carbon steel. This paper presents the results from investigation using constant stress-controlled fatigue tests with in-situ scanning electron microscopy (SEM), fatigue crack growth (FCG) rate tests, and fatigue fractography analysis. Microscopy images arrested by in-situ SEM showed that the fatigue crack propagation in F–P steel could become unstable more ealier compared with that in F–B steel. The fatigue cracks in ferrite–pearlite were more tortuous and could propagate more freely than that in ferrite–bainite microstructures. However, frequent crack branching were observed in ferrite–bainite steel and it indicated that the second hard bainite phase effectively retarded the crack propagation. The variation of FCG rate ( da / dN ) with stress intensity factor range (Δ K ) for F–P and F–B steels was discussed within the Paris region. It was shown that FCG rate of F–P steel was higher than that of F–B steel. Moreover, the fatigue fracture surface analysis proved that grain boundaries could also play a role in the resistance of crack propagation.
59 citations
TL;DR: In this paper, layered ECC-concrete beams subjected to static and fatigue flexural loads were investigated by experiments and the static test results showed that the application of a layer of ECC on the tensile side of a flexural beam increased its flexural strength and the degree of improvement increased with the thickness of the ECC applied.
59 citations
TL;DR: In this paper, a study of fatigue crack growth rate was conducted in two pearlitic rail steels, namely R260 and R370CrHT, and two crack plane orientations with respect to the rolling direction were tested.
59 citations