An Energy Criterion for Low-Cycle Fatigue

[+] Author and Article Information
D. E. Martin

General Motors Research Laboratories, Warren, Mich.

J. Basic Eng 83(4), 565-571 (Dec 01, 1961) (7 pages) doi:10.1115/1.3662268 History: Received February 06, 1961; Online November 04, 2011


A criterion for low-cycle fatigue is developed which supposes that the segment of strain hysteresis associated with work-hardening is a measure of damage. On the basis of this “damage” work criterion and assuming a linear work-hardening law, the well-known plastic strain-cyclic life equation, N1/2 Δεp = C is derived. The constant C in this equation is evaluated by setting the total damage energy absorbed in N cycles equal to the damage work of a static tensile test. This method of predicting the constant C is in much better agreement with room-temperature strain-cycling data than the previously suggested method of plotting the fracture ductility at 1/4 cycle.

Copyright © 1961 by ASME
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