| Z-A模型的修正及在预测本构关系中的应用 |
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| 引用本文： | 张宏建,温卫东,崔海涛,徐颖.Z-A模型的修正及在预测本构关系中的应用[J].航空动力学报,2009,24(6):1311-1315. |
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| 作者姓名： | 张宏建 温卫东 崔海涛 徐颖 |
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| 作者单位： | 南京航空航天大学,能源与动力学院,南京,210016 |
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| 基金项目： | 航空科技创新基金(08B52002) |
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| 摘 要： | Zerilli-Armstrong(Z-A)模型是基于热激活位错运动理论建立的具有物理理论基础的本构模型,但是模型建立的初始假设,降低了其预测精度.为此通过引入考虑应变率和温度耦合效应的应变强化指数对Z-A模型进行修正,拓展了其适用范围,并将修正后的Z-A模型应用于描述IC10合金在不同温度和应变率条件下的塑性流变行为.与修正前Z-A模型的预测结果及试验结果比较表明:修正后Z-A模型的预测精度有较大程度的提高,最大平均相对误差值从6.41%降低到3.65%.
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| 关 键 词： | constitutive equation modified Zerilli-Armstrong（Z-A） model alloy IC10 intermetallics |
| 收稿时间： | 6/3/2008 9:04:51 AM |
| 修稿时间： | 2008/8/20 0:00:00 |
Modification of Z-A model and the prediction of the constitutive model |
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| ZHANG Hong-jian,WEN Wei-dong,CUI Hai-tao and XU Ying.Modification of Z-A model and the prediction of the constitutive model[J].Journal of Aerospace Power,2009,24(6):1311-1315. |
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| Authors: | ZHANG Hong-jian WEN Wei-dong CUI Hai-tao and XU Ying |
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| Institution: | College of Energy and Power Engineering;Nanjing University of Aeronautics and Astronautics;Nanjing 210016;China |
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| Abstract: | Zerilli-Armstrong(Z-A) model was developed based on the constitutive model of thermally activated dislocation kinetics.But,some simplifying assumptions in Z-A model decreased its predicted accuracy.In order to improve the predicted accuracy,the strain hardening exponent function that considers the coupled effect of the strain rate and the temperature was introduced into Z-A model.And the modified Z-A model was used to describe flow behaviors of alloy IC10 under different experiment conditions.As compared wi... |
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| Keywords: | constitutive equation modified Z-A model alloy IC10 intermetallics |
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