钛/黄铜激光冲击焊接工艺的拉格朗日有限元模型计算与实验验证

IF 3.3 Q2 ENGINEERING, MANUFACTURING
S. Caruso, M. Sanguedolce, G. Serratore, Carmine De Bartolo, L. Filice, D. Umbrello
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引用次数: 0

摘要

当要求焊接部件具有高可靠性时,有关激光冲击焊接(LIW)过程中飞片变形的信息是需要考虑的一个重要方面。因此,需要精确的数值模型来模拟热和机械方面。在本研究中,通过二维有限元 (FE) 模型模拟了不同激光脉冲能量下钛/黄铜接头在激光冲击焊接过程中的横截面形态。考虑到飞行器的渐进变形,本文采用了流体动力等离子体压力模型,该模型能够逐级描述压力负荷的演变。因此,本文提出了一种替代传统节点集中力或预定速度作为飞行器边界条件的方法。碰撞点的等效塑性应变 (PEEQ)、剪应力和临界飞轮速度水平被用作预测焊接成功与否的参考参数,以区分焊接区域和未焊接区域。该模型通过与实验数据的对比进行了验证,结果表明所提出的 FE 代码在预测焊接材料的横截面形态方面非常有效。此外,还根据工艺的基本原理,通过改变工艺激光脉冲能量,预测了实际的工业信息,如飞碟冲击速度、碰撞角度和工艺温度的变化。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Lagrangian Finite Element Model Formulation and Experimental Validation of the Laser Impact Weld Process for Ti/Brass Joining
Information on the flyer deformation during laser impact welding (LIW) is an important aspect to consider when high reliability of the welded components is required. For this reason, accurate numerical models simulating thermal and mechanical aspects are needed. In the present work, the cross-section morphology during LIW of Ti/Brass joints at varying laser pulse energies is modeled by a 2D finite element (FE) model. A hydrodynamic plasma pressure model able to describe the evolution of the pressure load step by step, taking into account the progressive deformation of the flyer, was implemented. Hence, this paper proposes an alternative method to the conventional node concentrated forces or predefined velocity as flyer boundary conditions. The levels of the equivalent plastic strain (PEEQ), shear stress, and critical flyer velocity at the collision point were used as reference parameters to predict the success of the welding bond, distinguishing the welded area from the unwelded area. The model was validated by comparison with the experimental data, which showed the effectiveness of the proposed FE code in predicting the cross-section morphology of the welded materials. Moreover, practical industrial information such as variation in the flyer impact velocity, collision angle, and process temperatures was predicted by varying the process laser pulse energy according to the basic principle of the process.
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来源期刊
Journal of Manufacturing and Materials Processing
Journal of Manufacturing and Materials Processing Engineering-Industrial and Manufacturing Engineering
CiteScore
5.10
自引率
6.20%
发文量
129
审稿时长
11 weeks
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