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Thermomechanical modeling of the metallic rivet in friction riveting of amorphous thermoplastics
Welding in the World ( IF 2.1 ) Pub Date : 2021-01-21 , DOI: 10.1007/s40194-020-01049-0
Gonçalo Pina Cipriano , Willian S. de Carvalho , Pedro Vilaça , Sergio T. Amancio-Filho

The present work aims for an initial computational simulation with finite element analysis of the friction riveting process. Knowledge and experimental data from friction riveting of AA2024-T351 and polyetherimide supported the computational simulation. Friction riveting is a friction-based joining technology capable of connecting multiple dissimilar overlapping materials in a fast and simple manner. In this paper, the plastic deformation of the metallic rivet, process heat input, and temperature distribution were modeled and simulated. The plastic deformation of the metallic rivet is of key importance in creating the mechanical interlocking and main joining mechanism between the parts, being this the focus of this work. The influence of the polymeric material was considered a dynamic boundary condition via heat input and pressure profiles applied to the rivet. The heat input, mainly generated by viscous dissipation within the molten polymer, was analytically estimated. Three experimental conditions were simulated. The heat flux values applied in modeling of the different conditions were determined (8.2, 9.1, and 10.2 W/mm2). These yielded distinct plastic deformations characterized by a diameter of the rivet tip, from the initial 5 mm to 6.2, 7.0, and 9.3 mm. The maximum temperatures were 365, 395, and 438 °C, respectively.



中文翻译:

金属铆钉在非晶热塑性塑料摩擦铆接中的热力学建模

本工作旨在通过摩擦铆接过程的有限元分析进行初始计算仿真。来自AA2024-T351和聚醚酰亚胺的摩擦铆接的知识和实验数据支持了计算仿真。摩擦铆接是一种基于摩擦的连接技术,能够以快速简便的方式连接多种不同的重叠材料。本文对金属铆钉的塑性变形,过程热输入和温度分布进行了建模和仿真。金属铆钉的塑性变形对于在零件之间建立机械互锁和主要连接机制至关重要,这是这项工作的重点。通过热输入和施加到铆钉的压力曲线,可以认为聚合物材料的影响是动态边界条件。热量输入主要是由熔融聚合物中的粘性耗散产生的,已进行了分析估算。模拟了三个实验条件。确定了在不同条件下建模所应用的热通量值(8.2、9.1和10.2 W / mm2)。这些产生了明显的塑性变形,其特征是铆钉尖端的直径从初始的5毫米增加到6.2、7.0和9.3毫米。最高温度分别为365、395和438°C。

更新日期:2021-01-21
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