The Overload Retardation Effect in Fatigue Crack Propagation of Worm-Like Graphite Cast Iron

[+] Author and Article Information
Ange Zhang

Civil Engineering Department, East China Jiaotong University, Nanchang, Jiangxi, People’s Republic of China

Thang Bui-Quoc

Department of Mechanical Engineering, Ecole Polytechnique, Montreal, Canada

Xunfang Sun

Institute of Applied Mechanics, Southwestern Jiaotong University, Emei, Sichuan, People’s Republic of China

J. Eng. Mater. Technol 113(3), 307-313 (Jul 01, 1991) (7 pages) doi:10.1115/1.2903411 History: Received November 29, 1988; Revised August 17, 1990; Online April 29, 2008


In this paper, single and multiple overloading tests under cyclic controlled stress were carried out on specimens of Worm-like Graphite Cast Iron (WGCI), a brittle material. The results showed that the overloading had a strong retardation effect on this material when the overload ratio r (ratio between the overload range and the baseline load range) is larger than 1.2. For example, the number of cycles of retardation due to overloading, N’, may be as high as ten times the cycles, N, required for the same crack length under baseline loading. In addition, for the testing conditions examined, there is no significant difference in the retardation effect under single or multiple overloading for this material. An analytical model based on the concept of crack closure and the effective stress intensity range was developed for evaluating the effect of the retardation. The development led to a correlation between the number of applied cycles and the crack size after overloading and permits to calculate the retardation cycles N’. Finally, the mechanisms attributed to the retardation effect for WGCI are discussed.

Copyright © 1991 by The American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.





Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In