Topic
Fatigue limit
About: Fatigue limit is a research topic. Over the lifetime, 20489 publications have been published within this topic receiving 305744 citations. The topic is also known as: endurance limit & fatigue strength.
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TL;DR: In this article, it was shown that fatigue damage (cyclic strain localization, surface roughening, stage I crack initiation) develops even at loading amplitudes well below the PSB threshold in copper subjected to Ultra-High-Cycle Fatigue (UHCF).
73 citations
TL;DR: In this paper, the redistribution of residual hoop stresses due to the application of constant amplitude fatigue loading at 4% cold-expanded holes has been studied and a modified Sachs method was adopted to evaluate the residual stress profiles and a replication technique was used to quantify crack growth.
Abstract: — Cold-expansion of fastener holes is now commonly used within the aerospace industry to increase the fatigue endurance of airframes Although a number of methods of cold expansion are possible, the split-sleeve cold-expansion process is the most widely accepted and is frequently used in the repair and manufacture stages of both military and civil aircraft In the present work, the redistribution of residual hoop stresses due to the application of constant amplitude fatigue loading at 4% cold-expanded holes has been studied A modified Sachs method was adopted to evaluate the residual stress profiles and a replication technique was used to quantify crack growth It was found that the decay of the residual hoop stress profile near the bore of the hole was due to the initiation and growth of small fatigue cracks Cracks were found to initiate both near and below the fatigue limit, but subsequently arrested so stabilising the overall residual stress profile
73 citations
TL;DR: In this paper, an experimental study of the in-plane tension-tension fatigue behavior of the carbon fiber/epoxy matrix composite reinforced with non-crimp 3D orthogonal woven fabric is presented.
73 citations
TL;DR: In this paper, a high-cycle critical plane-based multaxial fatigue criterion is extended to notched components by using the so-called point method, where the location of the crack initiation point on the notch surface is determined, and the orientation of the critical plane (where to perform fatigue strength assessment) is assumed to be correlated with some averaged principal stress directions in the hot spot itself.
73 citations
Journal Article•
TL;DR: In this paper, a criterion which determines the number of cycles to initiation of a short crack is proposed to investigate the fatigue lifetime prediction of natural rubber (NR) components, and the results are plotted in the Haigh diagram which uses stress amplitude versus mean stress.
Abstract: In order to investigate the fatigue lifetime prediction of natural rubber (NR), a criterion which determines the number of cycles to initiation of a short crack is proposed. Uniaxial test results are plotted in the Haigh diagram which uses stress amplitude versus mean stress. It shows the influence of both parameters on the fatigue life. A first extension to multiaxial loadings has been studied using two kinds of axisymmetrical notched samples on an axial fatigue machine. A second test program was carried out with torsion fatigue tests. The corresponding 2D and 3D simulations with finite element analyses have been performed. The uniaxial criterion seems to be conservative considering the multiaxial extension. The experimental results in torsion suggest that the largest principal stress may be the main local parameter for multiaxial fatigue life predictions in NR components.
73 citations