Numerical simulation of temperature field in unsteady stage of friction plug welding

ZHENG Yongle; YAN Chongjing; GU Jieyan

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Numerical simulation of temperature field in unsteady stage of friction plug welding
Vol. 48, Issue 12, Pages: 61-65(2018)
Published：2018
DOI：
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DOI：

ZHENG Yongle, YAN Chongjing, GU Jieyan. Numerical simulation of temperature field in unsteady stage of friction plug welding[J]. Eletric Welding Machine2018, 48(12): 61-65. DOI：

摘要

基于摩擦塞焊非稳态阶段产热功率线性增长的规律

对产热功率进行线性化、模型化

建立摩擦塞焊非稳态阶段的产热模型

利用有限元分析软件ABAQUS模拟2 mm厚7075-T6铝合金板件的摩擦塞焊非稳态阶段热力耦合三维有限元模型

并利用试验测量结果验证数值模拟结果的准确性。模拟结果与试验测量结果较为吻合

误差在允许范围内

验证了产热模型及数值模拟结果的正确性。数值模拟结果表明

在靠近焊接区域任意一点的温度及应力仅与其距塞孔中心的距离有关。

Abstract

Based on the linear growth law of heating power during non-steady-state friction plug welding

the linearization of heat generation is carried out

and the heating model of friction plug welding under non-steady state is established. The finite element analysis software ABAQUS was used to establish a three-dimensional finite element model of friction plug welding in the unsteady state of 2 mm thick 7075-T6 aluminum alloy plate

and the accuracy was verified by the test results. The simulation results are in good agreement with the experimental measurements

and the error is within the allowable range

which verifies the correctness of the heat generation model and the numerical simulation results. The numerical simulation results show that the temperature and stress at any point close to the welding area are only related to the distance from the center of the plug hole.