Estimation of fatigue crack propagation rate in steel

✍ Scribed by Zhen Li

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 447 KB
• Volume: 48
• Category: Article
• ISSN: 0013-7944
• DOI: 10.1016/0013-7944(94)90124-4

✦ Synopsis

AImWet

-Based on the fatigue crack propagation (FCP) expression developed by X. Zheng and M. A. Hirt. a new method for the estimation of FCP rate is suggested. It is pointed out that when Ak;,, (the FCP threshold) and the mechanism in the intermediate region of FCP are known, the FCP rates can be predicted from tensile properties. In this paper, the FCP rate curves of low alloy steels SMSOB, H'I%O, SP42, SPVSO and their welded joints are predicted. It is shown that the predicted lines agree fairly well with the test results. It is also shown that FCP threshold AK,,, is sensitive to stress ratio R but not to weld technology.