Onn, Irwan Herman and Ahmad, Norhayati and Tamin, Mohd. Nasir (2015) Fatigue characteristics of dual-phase steel sheets. Journal of Mechanical Science and Technology, 29 (1). pp. 51-57. ISSN 1738-494X
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Official URL: http://dx.doi.org/10.1007/s12206-014-1208-x
Abstract
Fatigue characteristics of dual-phase steel sheets, commonly used in automobile body construction were established. For this purpose, a series of fatigue tests, each at constant stress amplitude were conducted on 1.2 mm-thick, dual-phase DP600 steel sheet specimens with two different load ratios of minimum-to-maximum stress, R = 0.1 and -1. The resulting fatigue behavior is expressed in terms of fatigue strength-life (S-N) curves. Fatigue behavior of the steel sheets in the high-cycle fatigue region can be represented by Basquin’s equation with coefficient and exponent value of 921.2 and 0.093, respectively. An endurance limit of 255 MPa is observed. In addition, fatigue strengths of the dual-phase steel sheets display lower magnitude than their bulk counterparts. Effect of mean stress on fatigue behavior of the steel sheets is well predicted by Walker’s model. Exponential calibration factor is introduced to the models by SWT, Goodman and Morrow with comparable prediction to the Walker’s model
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | exponential calibration factor, fatigue, mean stress, walker’s model |
| Subjects: | T Technology > TJ Mechanical engineering and machinery |
| Divisions: | Mechanical Engineering |
| ID Code: | 55270 |
| Deposited By: | Fazli Masari |
| Deposited On: | 22 Aug 2016 07:43 |
| Last Modified: | 15 Feb 2017 07:15 |
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