This paper proposes a finite element model implemented in ANSYS using Lagrangian formulation to assess heat generation and friction dynamics of a friction stir welding process on AA2024-T3 aluminum plates. For that aim, the model is enriched by estimating a temperature-dependent friction coefficient using theoretical relationships, and by considering a temperature-dependent multilinear isotropic hardening equation as a plasticity model representing the material. Both quantitative determinations are confirmed through experimental data collected on the real material. Finally, the contact conditions are modeled using the modified Coulomb criterion. The results of the model are in agreement with actual results observed on experimental applications. The study proves that the rotational speed of the tool is the most determinant factor in the results. As it rises, the friction-generated heat flow is higher. This study shows that the compressive stress-strain data in strain rate of 10s⁻¹ is a good approximation of the plasticity behavior of aluminum alloy during the friction stir welding.

本文提出了使用拉格朗日公式在ANSYS中实现的有限元模型，以评估Aa2024-T3铝板上摩擦搅拌焊接过程的生热和摩擦动力学。为此，可通过使用理论关系估算与温度相关的摩擦系数，并将与温度相关的多线性各向同性硬化方程视为代表材料的可塑性模型，来丰富模型。两种定量测定均通过在真实材料上收集的实验数据来确认。最后，使用修改后的库仑标准对接触条件进行建模。该模型的结果与在实验应用中观察到的实际结果一致。研究证明，工具的转速是结果中最主要的决定因素。随着它的升高，由摩擦产生的热流会更高。这项研究表明，应变速率为10s时的压应力-应变数据^-1是在搅拌摩擦焊接过程中铝合金的塑性行为的良好近似值。