Finite element analysis of heat generation in dissimilar alloy ultrasonic welding
Finite element analysis of heat generation in dissimilar alloy ultrasonic welding
复制标题
DOI：
10.1016/j.matdes.2018.07.041
复制
发表时间：
2018-11
影响因子：
8.4
通讯作者：
P. Jedrasiak;H. Shercliff
中科院分区：
文献类型：
--
作者：
P. Jedrasiak;H. Shercliff
本文提出了一种计算效率高的有限元分析，在超声波焊接（USW）的热生成。温度场预测从一个连续的热模型，间歇地计算的产热率，使用单周期的振荡的变形模型。将该模型应用于Al 6111自身的超声波焊接，以及DC 04钢和Ti6Al 4V，塑性变形仅发生在Al合金中。根据经验，在铝合金的本构塑性响应中允许超声软化。所有三种材料组合的预测产热率与从热电偶数据和热模型推断的产热率一致。材料变形图的开发作为一种手段，说明温度和应变率的主要变形制度。然后将热模型和变形模型完全耦合，作为概念的证明，以证明功率和温度历史可以直接从合金的本构数据和过程的运动学描述中预测。
This paper presents a computationally efficient finite element analysis of the heat generation in ultrasonic welding (USW). The temperature field is predicted from a continuous thermal model, with the heat generation rate being calculated intermittently, using a deformation model for single cycles of oscillation. The model was applied to USW of Al 6111 to itself, and to DC04 steel and Ti6Al4V, with plastic deformation only occurring in the Al alloy. Ultrasonic softening was allowed for empirically in the constitutive plastic response of the Al alloy. The predicted heat generation rate for all three material combinations was consistent with that inferred from thermocouple data and the thermal model. Material deformation maps were developed as a means of illustrating the dominant deformation regime of temperature and strain-rate. The thermal and deformation models were then fully coupled, as a proof of concept, to demonstrate that the power and temperature histories can be predicted directly from the constitutive data for the alloy and a kinematic description of the process.