锻压技术

7A09铝合金高温摩擦模型及微观机理分析

英文标题：High-temperature friction model and microscopic mechanism analysis on 7A09 aluminum alloy

单位：1.盐城工学院 2.燕山大学

分类号：TG146.21

出版年,卷(期):页码：2023,48(9):197-203

摘要：

采用CFTI型摩擦试验机，研究了润滑条件下不同的载荷、摩擦速度和温度对7A09铝合金摩擦因数的影响，并采用SEM分析微观状态下不同摩擦因素的作用机理。通过分析建立了基于不同载荷、摩擦速度和温度的变摩擦因数模型，并通过试验验证了模型的准确性。利用ABAQUS的子程序开发接口Fric和高级计算机语言Fortran对摩擦模型进行导入和有限元模拟，通过对比库伦摩擦模型的仿真结果和冲压试验的结果进行验证。结果表明：摩擦因数随着载荷的增加、摩擦速度的增加、温度的增加而减小；基于不同载荷、摩擦速度和温度的变摩擦因数模型的数据的拟合程度较好；变摩擦因数模型的仿真结果更接近于冲压试验的结果，铝板的减薄处在侧壁，验证了摩擦模型的有效性。

The influences of different loads, friction speeds and temperatures on the friction coefficient of 7A09 aluminum alloy under lubrication condition were studied by friction testing machine CFT-I, and the action mechanism of different friction factors in microscopic state was analyzed by SEM. Then, a variable friction coefficient model based on different loads, friction speeds and temperatures was established through analysis, and the accuracy of the model was verified by tests. Furthermore, the friction model was imported and simulated in finite element by using ABAQUS subroutine development interface Fric and advanced computer language Fortran, and it was verified by comparing the simulation result of Coulomb friction model with the result of stamping test. The results show that the friction coefficient decreases with the increasing of load, friction speed and temperature, the data fitting degree of the variable friction coefficient model based on different loads, friction speeds and temperatures is better, the simulation result of the variable friction coefficient model is closer to the result of stamping test, and the thinning of aluminum plate occurs on the side wall, which verifies the validity of the friction model.

基金项目：

作者简介：韩传德（1998-），男，硕士研究生 E-mail：1597805431@qq.com 通信作者：夏建生（1980-），男，博士，教授 E-mail：Xiajiansheng@163.com

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