Temperature effect of constant amplitude fatigue test and accelerated life evaluation method based on energy parameter

The essential of time and expense consuming in fatigue testing promotes researchers to develop more effective testing techniques such as the accelerated testing technique. However, accelerated fatigue testing has not been systematically studied due to the complexity of deformation mechanism, the loading profile effect interaction and lack of proper accelerated fatigue life prediction model and clear understanding of failure mechanism consistency boundary. There are at least three feasible ways to accelerate the fatigue testing: increase loading frequency, increase driving force and decrease deformation resistance. The objective of this work is trying to discuss the possibility of acceleration technique based on the temperature effect. The energy parameter has been involved in fatigue life prediction models because of the stabilization through the entire fatigue life. Three models accounting for the temperature effect were proposed and verified with experiment data from previous studies. The accelerated factor was determined and proved feasible to conduct accelerated experiments.