Journal ArticleDOI
A shear band decohesion model for small fatigue carck growth in an ultra-fine grain aluminium alloy
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TLDR
In this paper, a study of small fatigue crack growth behavior of an ultra-fine grain size aluminum alloy IN 9052 has been carried out and the in-situ SEM observations revealed that shear bands formed in the crack tip region were directly associated with the growth mechanism of the crack.About:
This article is published in Engineering Fracture Mechanics.The article was published on 2000-04-01. It has received 64 citations till now. The article focuses on the topics: Crack closure & Crack growth resistance curve.read more
Citations
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A study of the stress ratio effects on fatigue crack growth using the unified two-parameter fatigue crack growth driving force
TL;DR: In this paper, a unified two-parameter growth driving force model was developed to account for the residual stress and subsequently the stress ratio effect on fatigue crack growth, where the driving force should be expressed as a combination of the maximum stress intensity factor, Kmax, and the stress intensity range, ΔK, corrected for the presence of residual stress.
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An experimental evaluation of fatigue crack growth
TL;DR: In this paper, the authors examined the fatigue crack growth histories of a range of test specimens and service loaded components and concluded that in all cases, the crack growth shows, as a first approximation, a linear relationship between the log of the crack length or depth and the service history (number of cycles).
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On fatigue crack growth in ductile materials by crack-tip blunting
TL;DR: In this paper, the crack-tip opening displacement, CTOD, typically undergoes a transient behaviour, with no crack closure during many cycles, before a steady-state cycling with crack closure at the tip starts to gradually develop.
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Small time scale fatigue crack growth analysis
Zizi Lu,Yongming Liu +1 more
TL;DR: In this article, a new fatigue crack growth formulation at the small time scale is proposed, which is fundamentally different from the classical reversal-based fatigue analysis and is based on the incremental crack growth at any time instant within a cycle.
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Crack growth in ultrafine-grained AA6063 produced by equal-channel angular pressing
TL;DR: In this article, the effect of grain size distribution and work hardening on the crack growth behavior of AA6063, processed by equal-channel angular pressing (ECAP) via route E at room temperature, was evaluated with special emphasis on the effect on the grain size.
References
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Journal ArticleDOI
Fatigue damage and crack growth in aluminium alloys
TL;DR: In this article, the authors present evidence for microstructural changes that can occur in aluminium alloys when subjected to fatigue stress, and make distinctions between the various forms of fracture striation that are encountered.
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Crack extension by alternating shear
TL;DR: In this article, a comparison of the slip line flow field at the tip of a sharp crack and of a blunted crack is made, and it is shown that fatigue crack propagation is the result of repeated cyclic crack extension by alternating shear.
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In situ sem experiments concerning the mechanism of ductile crack growth
Horst Vehoff,Peter Neumann +1 more
TL;DR: In this article, the same mechanism for ductile crack propagation is operative in copper and in Fe-2.4%Si single crystals of appropriate shape and orientation were examined, and various predictions of the alternate slip model were verified.
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Low endurance fatigue in metals and polymers
B. Tomkins,W. D. Biggs +1 more
TL;DR: In this article, a model for crack propagation in low endurance fatigue is described, and a rigid-plastic analysis is shown to be consistent with the observations, and the model is used to evaluate the strength of cracks in annealed aluminium, Nylon 66 and Araldite epoxy resin.
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On the finite element simulation of three-dimensional semi-circular fatigue crack growth and closure
J.Z Zhang,P Bowen +1 more
TL;DR: In this article, the opening and closure behavior of a semi-circular moving crack has been studied using an elastic-plastic finite element model and the effects of different node release schemes, the refinement of the finite element mesh and the initial crack length have been studied.