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, the effects of short-term cyclic moisture aging on the strength and fatigue performance of a glass/vinyl ester pultruded composite system were investigated.
88 citations
TL;DR: In this paper, the effect of four roller burnishing tool parameters, namely, speed, depth of penetration, burnishing time and initial hardness of five different materials on the surface hardness, the out-of-roundness and the change in workpiece diameter was investigated.
88 citations
20 Aug 2009-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this article, the effect of aging treatment on fatigue behavior in extruded Mg alloys AZ61 and AZ80 was studied and two different aging conditions, T6 and T5, were evaluated.
Abstract: The effect of aging treatment on fatigue behaviour in extruded Mg alloys AZ61 and AZ80 was studied. Rotary bending fatigue tests were performed using as-received and aged specimens. Two different aging conditions, T6 and T5, were evaluated. Mg 17 Al 12 precipitated near grain boundaries and within grains by aging treatments. In both materials, the T6-treated specimens showed significantly lower fatigue strength than the as-received specimens, which was more remarkable in AZ80, while the T5-treated specimens exhibited slightly higher fatigue strength in AZ80. It was indicated that the effect of aging treatment on fatigue strength was mainly attributed to the change in fatigue crack initiation mechanism.
88 citations
TL;DR: In this article, a model for the simulation of damage initiation and subsequent propagation under cyclic loading is proposed, which combines phenomenological SN-curves for damage initiation with a fracture and damage mechanics approach for crack propagation.
Abstract: A model for the simulation of damage initiation and subsequent propagation under cyclic loading is proposed. The basis for the formulation is a cohesive law that combines phenomenological SN-curves for damage initiation with a fracture and damage mechanics approach for crack propagation. The evolution of the damage variable is expressed as a function of fatigue cycles. The model is independently calibrated for mode I and mode II loading using SN-curves and Paris-law coefficients obtained from simple coupon tests. The model was applied to three initiation-driven cases: Bending of 90° laminates, the Short Beam Shear test and the Double Notched Shear test. The predictions for the first two cases showed an excellent correlation with experimental data. Some modifications to the model were required when applying it to the Double Notched Shear test.
88 citations