Fatigue Crack Closure Following a Step-Increase Load

[+] Author and Article Information
K. K. Lo

Division of Engineering, Brown University, Providence, R. I. 02912

J. Appl. Mech 47(4), 811-815 (Dec 01, 1980) (5 pages) doi:10.1115/1.3153795 History: Received January 01, 1980; Revised May 01, 1980; Online July 21, 2009


A Dugdale-Barenblatt model is used to examine the effects of crack closure following a step increase in the applied cyclic loading. Complex function formulation is employed to calculate opening and contact loads. It is shown that the effect of previous history of loading on crack growth is significant only when the extent of crack growth is within about one plastic zone size.

Copyright © 1980 by ASME
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