Cumulative fatigue damage modeling—crack nucleation and early growth

Investigations into the cumulative fatigue life of an AISI 304L austenitic stainless steel used for pressure water reactors: Application of a double linear damage rule

“…In order to obtain a simplified analysis, easy to apply for engineering analysis, with an acceptable accuracy, the lowest and highest fatigue life N F1 , N F2 of the sequence are chosen. This choice is confirmed again in a most recent article [20]. It is also proposed to be taken into account only for levels corresponding to at least 1% fatigue life ratio.…”

Nonlinear fatigue damage assessment of existing bridges considering progressively deteriorated road conditions

“…However, it has been shown that LDR produces a large scatter in the fatigue life prediction for both metal and composites [13,14]. In addition, the load level dependence of fatigue damage cannot be explained by the LDR model [28]. LDR cannot explain that the fatigue damage D obtained in the experiments is larger than 1 for lowhigh load sequences and smaller than 1 for high-low sequences [12].…”

“…Manson and Halford [30] proposed a similar formula. In order to save the calculation cost, the nonlinear function can be approximated by double linear functions with linear damage accumulation rule applied [28]. Such simplifications can be easily used in two-block loading problems, but the parameters are too complicated for the multi-block loading or spectrum loading.…”

Probabilistic fatigue life prediction of composite materials

“…However, it has been shown that LDAR produces a large scatter in the fatigue life prediction of both metal and composites (Shimokawa and Tanaka 1980;Kawai and Hachinohe 2002). Also, LDAR cannot explain the load level dependence of fatigue damage observed in the experiments (Halford 1997). Despite all those deficiencies, LDAR is still frequently used due to its simplicity.…”