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基于连续损伤理论,考虑了变形温度与应变速率的影响,将与变形温度和应变速率相关的Zener-Hol-lomon参数作为一个修正函数A(Z)引入损伤演化模型,通过TC11钛合金在高温下的单向拉伸实验,确定了模型中的系数,建立了TC11钛合金高温塑性变形的损伤演化模型。通过高温压缩实验对模型进行了验证,结果表明,该模型可以很好地对TC11钛合金在低应变速率下的损伤行为进行预测。
Based on the continuous damage theory, considering the influence of deformation temperature and strain rate, the Zener-Hol-lomon parameter related to deformation temperature and strain rate is introduced into the damage evolution model as a modification function A (Z) Uniaxial tensile test to determine the coefficient of the model to establish the TC11 titanium alloy plastic deformation damage evolution model. The model was verified by high temperature compression test. The results show that this model can predict the damage behavior of TC11 titanium alloy under low strain rate.