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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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Journal ArticleDOI
TL;DR: In this paper, the authors used yield criteria to estimate the area and shape of the crack tip plastic zone using both von Mises and Tresca yield criteria, and stress maps were subsequently found by applying these yield criteria.
Abstract: This paper presents a novel methodology for the experimental quantification of the crack tip plastic zone during fatigue crack growth. It is based on the application of yielding criteria to estimate the area and shape of the crack tip plastic zone using both the von Mises and Tresca yield criteria. The technique employs strain maps calculated from displacement fields obtained by digital image correlation. Stress maps were subsequently found by applying these yield criteria. Fatigue cracks were grown in compact tension specimens made from commercially pure titanium at R ratios of 0.1 and 0.6, and the ability was explored of three different analytical elastic crack tip displacement models [Westergaard, Williams and Christopher–James–Patterson (CJP)], to predict shape and size of the crack tip plastic zone. This analysis indicated that the CJP model provided the most accurate prediction of the experimentally obtained plastic zone size and shape.

79 citations

Journal ArticleDOI
TL;DR: In this paper, industrial 2524 aluminium alloy plates with various grain sizes (0.8-298 µm) were prepared by cold rolling and heat treatment and the fatigue-crack growth rate was studied as a function of grain size through fatigue tests and microstructural observations.

79 citations

Journal ArticleDOI
TL;DR: In this article, the effects of positive stress ratios on the fatigue crack growth behavior of a forged, mill-annealed Ti-6Al-4V alloy with a duplex α + β microstructure are discussed.

79 citations

Journal ArticleDOI
TL;DR: In this article, the relative effects of pearlite and spherodite on ductile, cleavage, and fatigue failure are summarized, and it is shown that neither the cleavage strength nor the fatigue endurance limit appear to depend directly on cementite content per se.
Abstract: The relative effects of pearlite and spherodite on ductile, cleavage, and fatigue failure are summarized. Neither the cleavage strength nor the fatigue endurance limit appear to depend directly on cementite contentper se. Spherodized steels cleave less readily than ferrite/pearlite steels. Ductile fracture resistance is lowered considerably by both types of cementite, pearlite being more deleterious. Ferrite/pearlite steels appear to exhibit slower fatigue crack growth rates at low stress intensity levels than high strength steels. At high stress intensity levels the behavior is reversed. Slip-incuded cracking of carbide lamellae appears easier than that of spherodized carbides. In ductile fracture situations the crack spreads progressively through a pearlite colony via preferential cracking of carbides and rupture of the intervening ferrite accompanied by large local shear strains. Fatigue fracture proceeds with formation of frequent branches, preferentially along the pearlite colony interface.

79 citations

Journal ArticleDOI
TL;DR: Based on the experimental results for spot welds in square-cup, lap-shear and coach-peel specimens of dual phase, low carbon and high strength steels, kinked fatigue crack paths near spot weld was examined as discussed by the authors.

79 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023181
2022431
2021397
2020408
2019454
2018452