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 paper, the effect of the radial size of crack front elements and crack propagation on crack closure level is analyzed, and an extrapolation model is proposed, with excellent results.
91 citations
TL;DR: In this article, a model of fatigue crack growth based on elastic-plastic notch stress-strain analysis has been presented, where the fatigue crack can be analysed as a notch with the tip radius ρ ∗.
90 citations
TL;DR: In this article, the authors analyzed the mode-I crack growth behavior of geometrically similar edge-cracked single crystal specimens of varying size subject to both monotonic and cyclic axial loading using discrete dislocation dynamics.
90 citations
TL;DR: In this paper, the authors measured fatigue crack growth rates under cyclic torsional loading (R = −1, 1 Hz loading frequency) in AISI 4340 steel tempered at 650° C, with circumferentially notched specimens (12.7 mm specimen diameter).
Abstract: Fatigue crack growth rates have been measured under cyclic torsional loading (R = −1, 1 Hz loading frequency) in AISI 4340 steel tempered at 650° C, with circumferentiallynotched specimens (12.7 mm specimen diameter). The Mode III fatigue crack growth curve for macroscopically flat fracture surface — being obtained by an extrapolation procedure which eliminates the “Mode III crack closure” influence — has higher crack growth rates and shows a greater slope than Mode I results in the stress intensity range of ΔKIIIeff = 18 to 50 MPa m1/2. In the range of ΔKIIIeff < 18 MPa m1/2, the fracture surface has “factory roof” morphology (Mode I). The difference between fatigue crack growth behaviour in Mode III and Mode I as well as mechanisms that can lead to a fracture mode change are discussed. A comparison of the Mode III crack closure influence for specimen diameters of 12.7 mm (this study) and of 24.5 mm (an earlier study) shows that this influence is not only dependent on the depth of the crack and applied torque but also on the specimen diameter. The extrapolated crack growth rates show good agreement with measurements for various specimen diameters.
90 citations
TL;DR: In this paper, a finite element finite element (FE) model was built to simulate fatigue crack closure behavior in polycarbonate polysilicon. But the model was not applied to analyze the crack growth rate.
90 citations