Results 241 to 250 of about 20,306,957 (289)

Effects of strength level and loading frequency on very-high-cycle fatigue behavior for a bearing steel

International Journal of Fatigue, 2012
Rotating bending (52.5 Hz) and ultrasonic (20 kHz) fatigue tests were performed on the specimens of a bearing steel, which were quenched and tempered at 150 degrees C, 300 degrees C, 450 degrees C and 600 degrees C, respectively, to investigate the ...
Chengqi Sun, Youshi Hong, Aiguo Zhao
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Very high cycle fatigue – Is there a fatigue limit?

International Journal of Fatigue, 2011
Abstract 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.
B. Pyttel, D. Schwerdt, C. Berger
openaire   +1 more source

Editorial: Special Issue on Very High Cycle Fatigue

Materials Performance and Characterization, 2023
As the co-guest editors of the special issue of ASTM International’s journal Materials Performance and Characterization on very high cycle fatigue (VHCF), we are delighted to have this issue published by ASTM. Fatigue phenomena have long been a topic of significant interest and of research focusing on understanding the behavior of materials and ...
Jutima Simsiriwong, Meysam Haghshenas, Kirk Marquard, R. Keith Kersey   +3 more
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Progressive fatigue damage modeling for FRP in high cycle and very high cycle fatigue regimes

International Journal of Fatigue
A progressive fatigue damage model is proposed in this paper to model the FRP fatigue behaviors and damage progression in high cycle and very high cycle fatigue (HCF and VHCF) regimes.
Gen Li, Xiaorui Liu, Hao Li, Tianyu Chen, Zhengmao Yang, Huan Tu, Rubing Zhang   +6 more
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Fatigue characteristics of bearing steel in very high cycle fatigue

Journal of Mechanical Science and Technology, 2009
Very high cycle fatigue (VHCF) tests were carried out to find the fatigue characteristics of a super-long life range by using a cantilever type rotational bending fatigue test machine on three kinds of specimens in bearing steel which were quenched and tempered in air (A: non-shot peened and B: shot peened after heat treatment) and under vacuum ...
Chang-Min Suh, Jong-Hyoung Kim
openaire   +1 more source

Very high cycle fatigue

2018
In vielen Anwendungsbereichen werden Bauteile und Strukturen mit mehr als 107 Lastwechseln belastet. Beispielsweise sind Radsatzwellen und Eisenbahnrader innerhalb von wenigen Jahren nicht selten 109 Lastwechseln ausgesetzt. Auch Helikoptergetriebe haben nach einer Lebensdauer von 5000 h 109 und mehr Lastwechsel [4-1].
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Propagation Behaviour of Microstructurally Short Fatigue Cracks in the High-Cycle- and Very-High-Cycle Fatigue Regimes

Materials Science Forum, 2007
In the present paper examples for propagating and non-propagating conditions of slip bands and short fatigue cracks in a ferritic-austenitic duplex steel are given, which were quantified by means of SEM in combination with automated EBSD. To classify the results within the scope of predicting the service life under HCF- and VHCF-loading conditions a ...
Ulrich Krupp, Helge Knobbe, Olaf Düber, Hans Jürgen Christ, Philipp Köster, Boris Künkler, Claus Peter Fritzen   +6 more
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Step loading for very high cycle fatigue

Fatigue & Fracture of Engineering Materials & Structures, 2002
ABSTRACT The conventional method for determining fatigue strength at high cycle counts is to either extrapolate S–N data from lower cycle counts or to generate S–N data in the high cycle count regime using special high frequency test machines. In the process of generating S–N data, runout tests often occur where no failure is obtained within the ...
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An understanding of very high cycle fatigue of metals

International Journal of Fatigue, 2003
Abstract For modern technical applications like cars, trains, and aircrafts, the durability of some components is between 108 and 1010 cycles. However, there are very few experimental results beyond 107 cycles, where the standard fatigue limit is predicted using statistical approaches.
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Fatigue in Ti-6Al-4V at Very High Cycles

Materials Science Forum, 2007
The importance of determining and understanding the very high cycle fatigue behaviors of materials has gained strength in recent years. Ti-alloys, in view of their high strength-to-weight ratio, have a range of structural applications. Of these, Ti-6Al-4V, belonging to the alpha-beta type is the most widely used.
X.J. Cao, M.R. Sriraman, Qing Yuan Wang
openaire   +1 more source