金属在热成形过程中的微观组织演变是影响产品力学性能的关键因素，该演变过程取决于温度、应变和应变速率。
The microstructure evolution, which is governed by temperature, strain and strain rate during hot metal forming, is a key factor to the mechanical properties.
由此可以给出超塑性变形时应变和应变速率区的限度，有益于指导实际的超塑性成型。
From this, the Limit of strain rate and strain of superplasticity can be given, and this is useful for practice of deformation with superplasticity.
海冰对应变速率变化较敏感，在不同应变速率范围内可表现出不同的力学行为和强度特性。
Because of its strength sensitivity to strain rate, sea ice displays different mechanism behavior and strength features in different range of strain rate.
在该模型中，等效应变、等效应变速率和变形温度是模型的输入向量，输出向量是材料的流动应力。
True strain, strain rates and temperatures were input parameters of the model, while flow stress was the only output parameter.
应用该方法可以给出轧件变形过程中诸如温度场、应变场和应变速率场等各种热力结果。
The model can be used to predict the thermal and mechanical data such as temperature, strain, strain rate distributions.
高温下的材料流动应力通常是应变总量、温度和应变速率的函数，考虑这三个因素对流动应力的影响，建立了高温硬化材料的弹塑性本构关系矩。
The present work takes account of the above influence factors on the flow stress and derives a constitutive matrix for the hot deforming materials.
神经网络可以预测不同应变下的相应的流变应力，但是本构方程只可以根据不同的应变速率和温度来预测峰值应力。
And ANN model could predict the corresponding flow stress at different strain, but constitutive equations could only predict the peak stress depending on different strain rates and temperatures.
结果表明：实验条件下，流变应力及峰值应变随变形温度的降低和应变速率的提高而增大。
The results show that the flow stress and peak strain increase with increasing strain rate or decreasing deformation temperature.
试验结果表明，流变应力和峰值应变随变形温度的降低和应变速率的提高而增大。
The results show that the flow stress and peak strain increase with either increasing strain rate or decreasing deformation temperature.
结果表明，流动应力随应变速率的增大而增大，不同温度和应变速率的真应力-真应变曲线呈稳态流动型。
The results show that the flow stress increases with the increase of strain rate, and the true stress-true strain curves at different temperature and strain rates are stable-state.
流变应力和峰值应变随变形温度的升高和应变速率的降低而减小；
The results show that the flow stress and peak strain of 300M steel increase with the increase of strain rate or the decrease of deformation temperature.
流变应力和峰值应变随变形温度的升高和应变速率的降低而减小；
The results show that the flow stress and peak strain of 300M steel increase with the increase of strain rate or the decrease of deformation temperature.
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