自然科学版 英文版
自然科学版 英文版
自然科学版 英文版

您目前所在的位置:首页 - 期刊简介 - 详细页面

中南大学学报(自然科学版)

Journal of Central South University

第49卷    第5期    总第285期    2018年5月

[PDF全文下载]    [Flash在线阅读]

    

文章编号:1672-7207(2018)05-1072-08
基于动态材料参数的5083铝合金本构模型
戴青松1,邓运来1,欧世声1,付平2

(1. 中南大学 材料科学与工程学院,湖南 长沙,410083; 2. 广西柳州银海铝业股份有限公司,广西 柳州,545006)

摘 要: 通过热压缩试验研究5083铝合金在应变速率为0.01~10 s-1、变形温度为300~500 ℃、变形程度为50%条件下的流变行为,根据热模拟数据建立基于动态材料参数的双曲正弦函数本构模型(ZHCM)及幂函数本构模型(ZBCM),并对这2种本构模型的应力预测精确度进行计算。研究结果表明:ZHCM与ZBCM均有较高的应力预测精度,应力平均相对误差分别为5.26%和3.92%,相比之下,ZHCM在应变速率为10 s-1、变形温度为300 ℃的条件下应力精度比ZBCM的高,而当应变速率为0.01~1 s-1、变形温度为350~500 ℃时,ZBCM的应力精度较高。

 

关键字: 5083铝合金;热压缩;流变应力;动态材料参数;本构模型

Constitutive model of 5083 aluminum alloy based on dynamic material parameters
DAI Qingsong1, DENG Yunlai1, OU Shisheng1, FU Ping2

1. School of Materials Science and Engineering, Central South University, Changsha 410083, China; 2. Guangxi Liuzhou Yinhai Aluminum Co. Ltd., Liuzhou 545006, China

Abstract:The flow stress features of 5083 aluminum alloy were investigated by the isothermal compression test at the strain rates of 0.01-10 s-1, the temperatures of 300-500 ℃ and the deformation degree of 50%. According to the thermal simulation data, the hyperbolic sine constitutive model (ZHCM) and power function constitutive model (ZBCM) were established based on the dynamic material parameters. Furthermore, the stress prediction accuracies of two constitutive models were calculated. The results show that both ZHCM and ZBCM have high stress precision of prediction, and the average relative errors of stress are 5.26% and 3.92%, respectively. By contrast, the ZHCM has higher stress accuracy at the strain rate of 10 s-1 and the deformation temperature of 300 ℃, while the stress accuracy of ZBCM predicts more accurately at the strain rate of 0.01-1 s-1 and the deformation temperature of 350-500 ℃.

 

Key words: 5083 aluminum alloy; hot compression; flow stress; dynamic material parameter; constitutive model

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
版权所有:《中南大学学报(自然科学版、英文版)》编辑部
地 址:湖南省长沙市中南大学 邮编: 410083
电 话: 0731-88879765(中) 88836963(英) 传真: 0731-88877727
电子邮箱:zngdxb@csu.edu.cn 湘ICP备09001153号