Residual stress field and distortions resulting from welding processes: numerical modelling using Sysweld

Tiago R. Lima , Sérgio M.O. Tavares , Paulo M.S.T. de Castro
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引用次数: 11

Abstract

This paper concerns the study of residual stresses and distortions in fusion butt joint welding, using the computational modelling software ESI Sysweld. Thermal gradients across the part will introduce geometrical variations that cause residual stress and distortions; their study and prediction are critical to ensure a sound welding.

To foresee the welding behaviour is a complex task because there are many physical-chemical phenomena involved in the welding processes. Using Sysweld - a finite element method based software - it is possible to integrate all the physical-chemical phenomena and elaborate computational models for most welding cases.

A real case consisting of three sets of aluminium plates welded by laser will be studied in this paper. A finite element model is realized for each case and the results are analysed using Sysweld capabilities.

焊接过程中产生的残余应力场和变形:使用Sysweld的数值模拟
本文利用ESI Sysweld计算建模软件对熔合对接焊接过程中的残余应力和变形进行了研究。整个部分的热梯度将引入几何变化,导致残余应力和变形;它们的研究和预测是保证焊接质量的关键。由于焊接过程中涉及许多物理化学现象,因此预测焊接行为是一项复杂的任务。使用Sysweld(一种基于有限元方法的软件),可以将所有的物理化学现象和复杂的计算模型集成到大多数焊接案例中。本文将研究一个由三组铝板激光焊接而成的实际案例。对每种情况建立了有限元模型,并利用Sysweld功能对结果进行了分析。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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