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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 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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Crack initiation in plain concrete
Magazine of Concrete Research, 1976Synopsis At the tip of a sharp crack or re-entrant notch, the stresses calculated by a simple elastic analysis become infinite. Consequently, maximum-stress or -strain failure criteria and stress-concentration factors cannot be used to predict failure at such points. The linear elastic fracture mechanics theory can, however, be applied. In the paper,
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Nonarbitrary Crack Size Concept for Fatigue Crack Initiation
2005Abstract This appendix presents an analytical model that estimates damage rates for both crack initiation and propagation mechanisms. The model provides a nonarbitrary definition of fatigue crack initiation length, which serves as an analytical link between initiation and propagation analyses and appears to have considerable merit in ...
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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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Energy evaluations during crack initiation
Engineering Fracture Mechanics, 1991Abstract Experimental and analytical investigations of crack initation from single edge notched specimens of an amorphous polymer are reported. Experimental studies are aimed at observations of damage accumulation prior to crack initiation and the time to crack initiation under low cycle fatigue conditions.
G. Margaritis, J. Botsis
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Modelling fatigue crack initiation life
International Journal of Fatigue, 1993Abstract An accurate formula for the fatigue crack initiation (FCl) life, correlating it with the geometry of notched speciments, the cyclic loading conditions, the behaviour of metals and the tension overloading effect, has been developed based on the hypothesis of the widely used local strain approach, and checked by test results on the FCl life of
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Crack Initiation Under Cyclic Loading
2016The location of crack initiation depends essentially on the load level. According to Bathias, there are three basic types of crack initiation in the case of polished round samples.
Hans Albert Richard, Manuela Sander
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