Mixed-Mode Fatigue Crack Growth in Stainless Steels Under Biaxial Loading

[+] Author and Article Information
Cai-Fu Qian, Ming-O Wang, Bao-Juan Wu, Shu-Ho Dai

Department of Mechanical Engineering, Nanjing Institute of Chemical Technology, Nanjing, Jiangsu 210009, P.R. China

J. C. M. Li

Department of Mechanical Engineering, University of Rochester, Rochester, NY 14627

J. Eng. Mater. Technol 118(3), 349-355 (Jul 01, 1996) (7 pages) doi:10.1115/1.2806817 History: Received September 04, 1994; Revised July 30, 1995; Online November 27, 2007


Mixed-Mode fatigue crack propagation tests were carried out in stainless-steel cruciform specimens in which a center initial crack oriented at 45 deg was loaded biaxially. When the loadings were in-phase, the crack was deflected with the initial crack growth angles less than 50 deg and when they were out-of-phase, it was branched with the initial crack growth angles larger than 50 deg. In all the cases, the deflected or branched cracks propagated in Mode I, namely ΔKII was almost always zero along the crack paths. The relationship between deflected or branched cracks during propagation was also analyzed.

Copyright © 1996 by The American Society of Mechanical Engineers
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