摘要
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 continuum damage mechanics（CDM） theory, a ductile damage evolution model was proposed taking into account the influence of temperature and strain rate which can be expressed by Zener-Hollomon parameter. And then,parameters in the model were determined by uniaxial tensile tests of TCll alloy. The damage evolution model for plastic deformation of TCll alloy at high temperature was built and verified further by isothermal compression tests with good agreement under low strain rate.
出处
《塑性工程学报》
CAS
CSCD
北大核心
2008年第3期128-131,共4页
Journal of Plasticity Engineering
