NUMERICAL CALCULATION AND ANALYSIS OF FSW PROCESS FOR HIGH STRENGTH 7075 ALUMINUM ALLOY BASED ON CEL METHOD

被引：0

作者：

Liu, Yuanpeng ^{[1
]}

Chen, Kun ^{[1
,2
]}

Zeng, Guang ^{[1
]}

Wang, Zhenghe ^{[1
]}

Tian, Shuai ^{[1
]}

Nie, Kaishan ^{[1
]}

机构：

[1] School of Aerospace Engineering, Zhengzhou University of Aeronautics, Zhengzhou, China

[2] School of Materials Science and Engineering, Zhengzhou University of Aeronautics, Zhengzhou, China

来源：

UPB Scientific Bulletin, Series D: Mechanical Engineering | 2024年 / 86卷 / 01期

关键词：

3D modeling - Friction stir welding - High strength alloys - Numerical methods - Temperature distribution - Welds;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Taking 7075 aluminum alloy as the research object, considering the nonlinear influence of temperature change on material properties, The Johnson-Cook constitutive model is adopted to describe the thermodynamic properties of materials. Based on the Coupled Eulerian-Lagrangian (CEL) method, a 3D model of friction stir welding (FSW) process of 7075 aluminum alloy was constructed, and three stages of plunging, dwelling and welding were simulated by Thermodynamic coupling FE method. The influence of welding parameters on weld quality, temperature distribution and stress-strain was systematically studied. The results show that the temperature distribution during welding is asymmetrical, and the temperature of the retreating side is higher than that of the advancing side. The stress distribution is approximately symmetrical, but the distribution of PEEQ on the inner and outer sides of the shoulder stirring zone is uneven. After some materials reach thermoplasticity, it is difficult to further increase the temperature by increasing the rotating speed. However, the effect of reducing welding speed on increasing temperature is significant. The numerical results are in good agreement with the experimental results, which shows the correctness of the model. When the rotating speed is 1200mm/min and the welding speed is 144mm/min, the highest temperature reaches more than 93% of the melting point of the material, the welding defects are reduced and the weld forming quality is excellent. © 2024, Politechnica University of Bucharest. All rights reserved.

引用

页码：147 / 162