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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01 Jan 2002
TL;DR: In this paper, the authors studied the effect of hardness HV on fatigue limits of materials containing defects and inclusions, and fatigue limit prediction equations were proposed. But they did not consider the effects of nonmetallic inclusions on fatigue strength.
Abstract: Chapter headings. Mechanism of fatigue in the absence of defects and inclusions. Stress concentration. Notch effect and size effect. Effect of size and geometry of small defects on the fatigue limit. Effect of hardness HV on fatigue limits of materials containing defects, and fatigue limit prediction equations. Effects of nonmetallic inclusions on fatigue strength. Bearing steels. Spring steels. Tool steels : effect of carbides. Effects of shape and size of artificially introduced alumina particles on 1.5Ni-Cr- Mo (En24) steel. Nodular cast iron. Influence of Si-phase on fatigue properties of aluminium alloys. Ti alloys. Torsional fatigue. The mechanism of fatigue failure of steels in the ultralong life regime of N >107 cycles. Effect of surface roughness on fatigue strength.
503 citations
TL;DR: In this article, the authors evaluated the fatigue life of AISI 4340 steel, used in landing gear, under four shot peening conditions and found that relaxation of the residual stress field occurred due to the fatigue process.
476 citations
Book•
01 Jan 1980TL;DR: Theories of hardening and softening of fatigue cracks have been investigated in this article, where the authors present a detailed description of fatigue-crack propagation rate and threshold and the effects of miscellaneous factors on the crack propagation rate.
Abstract: 1. Introduction. 2. Cyclic Stress-Strain Response. Mechanical properties. Microstructure. Theories of hardening and softening. 3. Fatigue-Crack Nucleation. Stress near surface. Sites of crack initiation. Near-surface dislocation structures. Surface relief and its relation to near-surface dislocation structures. Mechanisms of crack nucleation. Factors influencing crack nucleation. 4. Fatigue-Crack Propagation. Kinetics of crack growth. Fracture mechanics for fatigue cracks. Quantitative description of fatigue-crack propagation rate and threshold. Properties of plastic zone. Models of fatigue-cracks propagation and thresholds. Effects of miscellaneous factors on the crack-propagation rate. 5. Fatigue-Life Curves. Fatigue-life curve a versus f. Fatigue-life curve a versus f. Transformation of fatigue-life curves. Influence of cycle asymmetry. Hysteresis energy and fatigue life. Fatigue limit. Curves of constant damage. S/N curves of precracked bodies. Influence of temperature on fatigue life. 6. Notched Behaviour. Stress and strain concentration. Influence of notches on fatigue life. 7. Fatigue Life for Random Loading. Cyclic plasticity. Analysis of random variations of stress and strain. Prediction of fatigue life. References. Subject Index.
475 citations
TL;DR: In this paper, the fatigue performance of stainless steel 316L has been investigated using electronoptical techniques and X-ray diffraction in order to shed light on the process-microstructure-property relationships for this alloy.
474 citations
TL;DR: In this paper, the shape of the S-N curve beyond 10 7 cycles is unknown except in some statistical approaches, and this is also true for the fatigue limit, and the standard deviation applied to the average fatigue limit is certainly not the best way to reduce the risk of rupture in fatigue.
Abstract: Generally, the shape of the S-N curve beyond 10 7 cycles is unknown except in some statistical approaches, and this is also true for the fatigue limit. In the case of a statistical approach, the standard deviation applied to the average fatigue limit is certainly not the best way to reduce the risk of rupture in fatigue. Only the exploration of the life range between 10 6 and 10 10 cycles will create a safer basis for modelling. Today, some piezoelectric fatigue machines are very reliable, capable of producing 10 10 cycles in less than 1 week. We based our research on accelerated fatigue tests which were performed at 20 kHz in the gigacyclic fatigue regime in order to study several typical alloys from the aeronautical and space industries.
462 citations