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基于NAFEMS材料非线性基准,建立了在高温和内压作用下铝合金A356材质的汽车轮毂Norton热诱导长效蠕变模型。结果表明:蠕变松弛现象随着时间的推移从轮毂外半径向内半径传播,铝合金材质的汽车轮毂经历长时间的应力历史后,会发生蠕变行为;将汽车轮毂Norton蠕变模型仿真结果与相同高温和内压条件下汽车轮毂的应力和位移实验结果进行对比,验证该Norton蠕变模型对预测汽车轮毂热诱导长效蠕变行为的有效性。
Based on the non-linear reference of NAFEMS material, Norton heat-induced long-term creep model of aluminum alloy wheel hub A356 under high temperature and internal pressure was established. The results show that the creep relaxation phenomenon propagates from the outer radius to the inner radius of the hub over time, and the creep behavior occurs when the aluminum alloy wheel has experienced a long period of stress history. The Norton creep model of the automobile wheel Compared with the experimental results of stress and displacement of automobile hub under the same high temperature and internal pressure conditions, the Norton creep model is validated to predict the thermally induced long-term creep behavior of automobile hub.