恒幅载荷下填充天然橡胶概率疲劳寿命预测模型OA北大核心CSTPCD

A conditional probability distribution model was proposed to quantify the distribution law of rubber fatigue life under arbitrary strain levels.The uniaxial tensile fatigue tests of rubber un-der different strain levels were carried out.The distribution law of rubber fatigue life was analyzed,and the parameter values of the probability distribution model were determined by a great likelihood estimation method.The least squares method was used to fit the functional relationship between strain level and parameter values of the probability distribution model,and then the conditional probability distribution model was established.The rubber fatigue reliability assessment was carried out,and the rubber P-ε-N model was established.The validity of the rubber P-ε-N model was verified by compari-son with the measured lifetimes.