Volume 16, Issue 5 (September 1988)
Evaluation Procedure for Low Cycle Fatigue Data
An evaluation procedure for low cycle fatigue data is described that uses engineering judgement as a primary evaluation tool, coupled with a computer and statistics. The procedure is suitable for micro or main-frame computers and can be used by technical personnel. Advantages of this procedure are speed, ease of use, and the ability to maintain automatically the integrity of all necessary equations and yield fatigue properties that can be employed in actual life predictions. The mathematical model used within the procedure is an extension of the S-log N curve and accounts for plastic strain which causes fatigue damage. This model, however, applies only to wrought metals, where internal defects do not govern fatigue life.