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Proceedings Paper

Fatigue behavior of carbon steel by symmetric bending ultrasonic frequency method
Author(s): Weiwei Tang; Hong Wang; Lixun Cai
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Paper Abstract

In order to further broaden the scope of the study on ultrasonic fatigue test and realize a variety of loading, a new experimental method named as symmetric bending ultrasonic fatigue (SBUF) method to determine the fatigue behavior of materials by symmetric bending loading is presented in this paper. A series of SBUF tests of two carbon steels with stress ratio R = -1 were carried out. Fatigue behaviors of the two carbon steels were researched by SBUF tests. The results show that the S-N curves under ultrasonic symmetric bending loading display the characteristic of "continually decreasing type" up to 109 cycles and exhibit no traditional horizontal plateau beyond 106 cycles, when the fatigue cycles is over 109, fatigue failure do occurs; S-N curves under ultrasonic symmetric bending loading can be described with the equation of Basquin. Compared to the S-N curves under the axial ultrasonic symmetric tension-compression loading, the results show that in high-cycle stage (<107cycles), the loading method has a significant effect on fatigue properties, but in ultra-high-cycle stage (>107cycles), the loading method has no significant impact on fatigue properties. An influence coefficient of the loading method is introduced in order to describe the influence of loading method of the ultrasonic fatigue.

Paper Details

Date Published: 27 August 2009
PDF: 6 pages
Proc. SPIE 7375, ICEM 2008: International Conference on Experimental Mechanics 2008, 73755O (27 August 2009); doi: 10.1117/12.839351
Show Author Affiliations
Weiwei Tang, Southwest Jiaotong Univ. (China)
Hong Wang, Southwest Jiaotong Univ. (China)
Lixun Cai, Southwest Jiaotong Univ. (China)

Published in SPIE Proceedings Vol. 7375:
ICEM 2008: International Conference on Experimental Mechanics 2008
Xiaoyuan He; Huimin Xie; YiLan Kang, Editor(s)

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