Results 311 to 320 of about 19,892 (363)
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Fatigue Crack Initiation with Creep
1982Experimental observations of the micromechanics theory of fatigue crack initiation of Lin and Ito are reviewed. This theory is shown to be applicable also for time-dependent fatigue. An aluminum polycrystal subject to cyclic tension and compression is considered.
T. H. Lin, S. R. Lin
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Fatigue analysis for crack initiation
Quality and Reliability Engineering International, 1986AbstractFor the prediction of life leading to fatigue crack initiation, a method for performing a cycle‐by‐cycle local stress analysis at the stress concentration area of a structural component was developed. Elastoplastic stress‐strain values along the hysteresis loop are traced for each load reversal in making the life prediction calculations.
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Fatigue crack initiation at a notch
International Journal of Fatigue, 2011A short crack approach has been developed to determine the fatigue crack initiation life at a notch tip, in which the initiation life is assumed to correspond to the period during which an initial crack, equivalent to a microscopic defect, grows to attain a detectable size. This approach is compared to conventional local strain approach and it is shown
Ranganathan, Narayanaswami +5 more
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Fatigue Crack Initiation in Iron
1983Fatigue crack initiation in iron of 99.93+ w/o purity has been carefully characterized at constant plastic strain amplitudes varying from 10−4 to 10−2. Fatigue microcracks initiate transgranularly at all amplitudes; the initial microcracks which form are less than 1 µm in length, as determined by transmission electron microscopy of replicas.
C. V. Cooper, M. E. Fine
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A Theory of Fatigue Crack Initiation
1991A theory of fatigue crack initiation based on the Gibbs free energy consideration is proposed. The theory is extended to the cases when the free surface effect and interface effect are considered.
T. Mura, S. Qin, H. Fan
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Crack Gages for Detecting Fatigue Crack Initiation
Journal of Structural Engineering, 1987The use of fatigue crack gages is examined, in order to provide a clear indication of fatigue crack inititation and early subscritical crack growth in structural steel details. The crack gage consists of a thin steel coupon that can be bonded to a structural member in the vicinity of a known stress raiser, such as at the end of a cover plate or near a ...
Charles K. Nmai, Mark D. Bowman
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The initiation of fatigue cracks in copper
British Journal of Applied Physics, 1967A new sectioning technique has been successfully developed and used to determine the three-dimensional form of the initial fatigue crack in copper. As previously found, intrusions are the earliest form of damage detectable and it has been further shown that their extension is by the formation of tubular holes starting from the surface.
W D Dover, W J D Jones
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A Probabilistic Method to Predict Fatigue Crack Initiation
International Journal of Fracture, 2006zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Kulkarni, Salil S. +4 more
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A Review of Fatigue Crack Initiation
1985This paper reviews the fundamental aspects of fatigue crack initiation in lightly alloyed polycrystalline metals. The introduction presents the motivations behind this study along with some general remarks. The second section discusses the mechanisms of fatigue crack initiation that include: i) the cyclic hardening and saturation of materials at early ...
J. W. Provan, Z. H. Zhai
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Prediction of fatigue crack initiation for rolling contact fatigue
International Journal of Fatigue, 2000In finite element (FE) simulations of a twin disc test of a wheel/rail contact, fatigue crack initiation criteria for elastic shakedown, plastic shakedown and ratchetting material responses were evaluated for a pearlitic rail steel BS11 normal grade.
Ringsberg, J. W. +4 more
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