Fatigue residual stiffness prediction model based on the degradation law of composite material properties
A composite fatigue residual stiffness prediction model is proposed to address the problem of incom-plete consideration of influencing factors in the construction of existing residual stiffness prediction models,which simultaneously considers the combined effects of maximum stress,initial stiffness,critical residual stiffness,cycle life,and constant amplitude fatigue life.The results indicate that the proposed model conforms to the three-stage performance degradation law and can be used to describe the residual stiffness degradation of composite materials with high accuracy;the model exhibits higher prediction accuracy in the region of higher stress than that in the re-gion of lower stress,which is related to the concentration of test data in the higher stress region;compared with ex-isting model,the model proposed in this paper has high prediction accuracy and applicability for the fatigue residual stiffness of composite materials as a whole.
composite materialresidual stiffness prediction modeldegradation lawmaximum stresscycle life
万方数据
维普
