Fatigue-damage Evaluation For Mild Steel Incorporating Mean Stress And Overload Effects

Author:  Watson, P. and Topper, T.H.
Source:  SESA, Vol. XXIX, No. 1
Doc ID:  1972028
Year of Publication:  1972
Abstract:  
Successful estimation of the service life of a structure or component which is subjected to a complex history of loading, depends on a suitable cumulative damage summation technique. A general technique must be capable of predicting the effects on fatigue life of geometry, mean stress or strain, occasional overloads or overstrains, frequency of cycling and enviroment. As a contribution towards the general solution, this paper describes the utilization of a fatigue damage summation method which incorporates two of these variables, mean stress and overloads. The method is tested for complex load histories in mild steel specimens in the intermediate to long life range.