Results 321 to 330 of about 3,738,609 (380)
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A study of the fatigue limit of copper
Metallurgical Transactions A, 1975This paper shows that, in fatigue tests on copper, a great number of cycles beyond expectation is necessary for determining the fatigue limit. An ultrahigh frequency fatigue testing machine was used andS-N curves covering 1010 cycles were obtained for annealed specimens and for stretched ones. In annealed copper, the fatigue limit appeared at about 9.8
A. Omura +3 more
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Estimating Fatigue Curves with the Random Fatigue-Limit Model
Technometrics, 1999In a fatigue-limit model, units tested below the fatigue limit (also known as the threshold stress) theoretically will never fail. This article uses a random fatigue-limit model to describe (a) the dependence of fatigue life on the stress level, (b) the variation in fatigue life, and (c) the unit-tounit variation in the fatigue limit.We fit the model ...
Pascual, Francis, Meeker, William
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Very high cycle fatigue – Is there a fatigue limit?
International Journal of Fatigue, 2011Abstract The paper gives an overview of the present state of research on fatigue strength and failure mechanisms at very high number of cycles ( N f > 10 7 ). Testing facilities are listed. A classification of materials with typical S – N curves and influencing factors like notches, residual stresses and environment are given.
Christina Berger +2 more
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FATIGUE FAILURE AT STRESSES BELOW FATIGUE LIMIT
Fatigue & Fracture of Engineering Materials & Structures, 1986AbstractIn the present study, the authors have focused attention on the internal stress in a material. A stress applied to a specimen does not fully act to deform the material. The effective stress which actually acts on dislocations depends on the internal stress in the material.
C. Iwasaki, Y. Ikai
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On the Dang Van fatigue limit in rolling contact fatigue
International Journal of Fatigue, 2006Recently, various methods have been proposed to assess the risk of rolling contact fatigue failure and in particular, the Dang Van multiaxial fatigue criterion has been suggested in a simple approximate formulation by Ekberg, Kabo and Andersson. In a recent note by Ciavarella and Maitournam, it was found that the approximation is only valid in a ...
CIAVARELLA, Michele +2 more
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, 2020
The improvement in adhesion technology for joining different types of materials has led to expectations of weight reduction in cars and commercial vehicles. Various levels of stress and stress ratios are loaded onto the joints of such transport vehicles.
K. Houjou +3 more
semanticscholar +1 more source
The improvement in adhesion technology for joining different types of materials has led to expectations of weight reduction in cars and commercial vehicles. Various levels of stress and stress ratios are loaded onto the joints of such transport vehicles.
K. Houjou +3 more
semanticscholar +1 more source
Fatigue limit of notched bodies
Materials Science and Engineering, 1978Abstract The fatigue limit of notched bodies was analysed on the basis of the physical interpretation of the fatigue limit of smooth bodies. The relation between the stress concentration factor, Kt, and the fatigue notch factor, Kf, was derived theoretically, taking into account both the effect of the cyclic plasticity at the notch root and the ...
M. Klesnil, Petr Lukáš
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Rapid estimation of fatigue limit for C45 steel by thermography and digital image correlation
, 2020Combining thermography and Digital Image Correlation (DIC) measurements, this paper aims to experimentally capture the fatigue damage phenomenon in steels, with a methodology allowing to rapidly estimate the fatigue limit.
C. Colombo +3 more
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On the fatigue limit in α-iron
Materials Science and Engineering, 1970Abstract Titanium-stabilized as well as non-stabilized α-iron has been tested in fatigue. Using transmission electron microscopy the dislocation structures in the two materials have been studied and compared at various stages of the fatigue process, with special attention to the cause of the fatigue limit.
Y. Bergström +2 more
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Random features of the fatigue limit
Extremes, 1999The possibility of estimating the fatigue limits of metallic materials for design purposes is investigated. The fatigue limit is defined as the highest stress amplitude for which material in question has an infinite life. The most common method for fatigue limit estimations is to make laboratory tests on a number of specimens and use some statistical ...
Thomas Svensson, Jacques de Maré
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