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首页> 外文会议>Conference on Laser Materials Processing Vol.85f: Welding and Modeling, Nov 16-19, 1998, Orlando, FL USA >Process Prototyping for Laser Material Processing -Advanced Finite Element Models for the Simulation of Laser Welding
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Process Prototyping for Laser Material Processing -Advanced Finite Element Models for the Simulation of Laser Welding

机译：激光材料加工的工艺原型-用于模拟激光焊接的高级有限元模型

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摘要

In modern product development computer based simulations of manufacturing processes gain more and more significance. The goal of these simulations is to obtain information on the process as well as on the resulting product properties at an early stage. Concerning laser welding, the iwb has developed a procedure, based on Finite Element Analysis (FEA), where the welding process and the resulting product properties are investigated in three steps. In a first step the microscopic properties of the joint, e.g. the geometry of the weld seam, are determined using a thermal analysis of the process. The heat influence on the work piece, e.g. the residual stresses and distortion, are analysed in a coupled thermo-mechanical simulation of the welding process. Finally the resulting properties of the laser welded structure under load, for example stiffness or fatigue strength, can be investigated by a mechanical analysis. The paper focuses on recent improvements of the different models. New modelling techniques, e.g. adaptive meshing, are presented and compared to conventional modelling. In the mechanical analysis of laser welded structures under load, different approaches for a realistic representation of the weld seam in the simulation will be presented and discussed, for example different material models for base material, heat affected zone and weld pool. The above described new models for laser welding and laser welded structures will be illustrated by some examples of aluminium and steel structures.
机译：在现代产品开发中，基于计算机的制造过程模拟越来越重要。这些模拟的目的是在早期阶段获得有关过程以及所得产品属性的信息。关于激光焊接，iwb已基于有限元分析（FEA）开发了一种程序，其中分三步研究了焊接工艺和所产生的产品性能。第一步，关节的微观特性例如焊缝的几何形状是通过对过程的热分析确定的。热量对工件的影响，例如在焊接过程的热机械耦合模拟中分析了残余应力和变形。最后，可以通过机械分析来研究激光焊接结构在负载下的最终性能，例如刚度或疲劳强度。本文重点介绍不同模型的最新改进。新的建模技术，例如提出了自适应网格划分并将其与常规建模进行比较。在载荷作用下的激光焊接结构的力学分析中，将提出并讨论模拟中焊缝的真实表示的不同方法，例如用于基础材料，热影响区和焊池的不同材料模型。通过铝和钢结构的一些示例来说明上述用于激光焊接和激光焊接结构的新模型。

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