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The Propagation of Fatigue Cracks
Journal of Applied Mechanics, 1956Abstract A theory of the rate of growth of fatigue cracks is extended to the case of large stresses. Recent measurements of McClintock and Ryan are discussed.
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Propagation of a fatigue crack in a weld
Strength of Materials, 19761. The dependence of the growth rate of a fatigue crack on the stress intensity coefficient at the tip of the crack is described by an exponential function of the da/dN=CΔKn type for all zones of a welded joint. For a given applied stress and realizable values of ΔK the index n in this function has a constant value, differing for each particular ...
Yu. A. Novikov +2 more
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Fatigue crack propagation in maragingsteel
Materials Science and Technology, 1997AbstractFatigue crack growth behaviour in different conditions of maraging (350) steel was studied at a stress ratio R = 0.1, at a constant applied stress level. The slope m in the Paris region was found to be almost the same in the annealed and aged conditions.
K. Hussain +3 more
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1982
The determination of the fatigue crack propagation curve is an essential part of the fracture mechanics design approach. Residual strength calculation procedures have obvious shortcomings, but the prediction of fatigue crack propagation characteristics is even less accurate, despite the vast amount of research that has been done on this subject.
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The determination of the fatigue crack propagation curve is an essential part of the fracture mechanics design approach. Residual strength calculation procedures have obvious shortcomings, but the prediction of fatigue crack propagation characteristics is even less accurate, despite the vast amount of research that has been done on this subject.
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A model for fatigue crack propagation
Engineering Fracture Mechanics, 1975Abstract A model for fatigue crack propagation is presented which incorporates low cycle fatigue, mechanical properties and a microstructurally-associated process zone. Comparison of the model to published date for 4340 (hard and soft), a series of TRIP steels, Ti-6A1-4V, 2024-T6 and 300 grade maraging steel shows good agreement.
Stephen D. Antolovich +2 more
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2014
Fatigue failure is caused by the initiation of micro cracks from small defects in a material, followed by their propagation resulting in the formation of macro cracks, where the magnitude of applied stress may be lower than the yielding stress but the load is repeatedly applied to the material.
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Fatigue failure is caused by the initiation of micro cracks from small defects in a material, followed by their propagation resulting in the formation of macro cracks, where the magnitude of applied stress may be lower than the yielding stress but the load is repeatedly applied to the material.
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Alloys and Fatigue Crack Propagation
2018Aluminium alloys were for many decades the material of choice for aircraft structures. Although this prominence no longer exists, these alloys still represent a substantial part of the aircraft. This section briefly reviews the fatigue crack propagation behaviour of typical Al alloys, including Al-Li alloys of interest because of their low weight and ...
Sérgio M. O. Tavares +1 more
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Fatigue Crack Propagation Threshold
Journal of Testing and Evaluation, 1989Abstract Service-type fatigue loading conditions are critically analyzed with respect to their relevance for a fatigue crack growth threshold. It was found that a threshold should be experimentally determined as a function of the monotonic-plastic zone size (i.e., as a function of Kmax). For each Kmax the cyclic-plastic zone size depends
G Marci, DE Castro, V Bachmann
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On the entropy of fatigue crack propagation
International Journal of Fatigue, 2020Abstract Entropy flow from the plastic zone ahead of a crack tip is predicted analytically and measured experimentally for stainless steel SS304. It is shown that crack propagation rate is related to the entropy flow during cyclic loading of a flat specimen in mode I.
B. Hajshirmohammadi, M.M. Khonsari
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The Mechanism of Fatigue Crack Propagation
Key Engineering Materials, 2007As a retardation of fatigue crack propagation occur under two step loading such as high to low loading, it is difficult to predictt the fatigue life in variable loading conditions. Therefore, the mechanism of retardation was investigated by changing the ratio of two step-loading in some materials in this paper.
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