当前位置：首页 > 过刊浏览->2019年40卷第10期
SiC_p/2024Al基复合材料蠕变时效幂律本构方程的建立
Establishment of Creep Aging Power Law Constitutive Equation of SiC_p/2024Al Composites
浏览(1611) 下载(5)
- DOI:
- 作者:
- 孙有平 胡一杰 陶德福 何江美 李旺珍
SUN Youping;HU Yijie;TAO Defu;HE Jiangmei;LI Wangzhen
- 作者单位:
- 广西科技大学机械与交通工程学院
School of Mechanical and Transportation Engineering, Guangxi University of Science and Technology, Liuzhou 545006,China
- 关键词:
- SiCp/2024Al 复合材料 蠕变时效 本构模型
SiCp/2024Al composites creep aging constitutive model
- 摘要:
- 在时效温度423~463 K、实验应力150、175和200 MPa的条件下,采用电子蠕变机对SiCp/2024Al基复合材料蠕变时效行为进行研究。采用幂律本构方程,通过对实验数据的线性回归分析,建立SiCp/2024Al基复合材料稳态蠕变速率与实验应力及时效温度之间的本构模型。研究表明,随着实验应力增大和时效温度的升高,SiCp/2024Al基复合材料的稳态蠕变速率增大,且蠕变曲线在第二阶段的持续时间缩短;根据本构模型计算得到的稳态蠕变速率的计算值与实验值基本吻合,表明该本构模型能准确的描述SiCp/2024Al基复合材料蠕变时效行为。The creep aging behavior of SiCp/2024 Al composites was studied on the electronic creep machine at the temperature from 423 to 463 K and under the stress of 150, 175 and 200 MPa. The constitutive model of SiCp/2024 Al composites between steady state creep rate and experimental stress and aging temperature was established by power law constitutive equation and linear regression analysis of experimental data. The results show that the steady creep rate of SiCp/2024 Al composites increases with the increase of experimental stress and aging temperature, and the duration of creep curve in the second stage decreases. The calculated value of steady creep rate is basically consistent with the experimental value, which indicates that the constitutive model can accurately describe the creep aging behavior of SiCp/2024 Al composites.