A practical method for prediction of distortion produced on large thin plate structures during welding assembly
A practical method for prediction of distortion produced on large thin plate structures during welding assembly
复制标题
DOI：
10.1007/s40194-013-0071-1
复制
发表时间：
2013-07
影响因子：
2.1
通讯作者：
H. Murakawa;Y. Okumoto;S. Rashed;M. Sano
中科院分区：
文献类型：
--
作者：
H. Murakawa;Y. Okumoto;S. Rashed;M. Sano
熔焊工艺由于其高生产率而广泛用于组装大型薄板结构，例如船舶、汽车和客车。然而，焊接变形往往不可避免地发生在装配过程中。焊接变形不仅降低了焊接结构的制造精度，而且由于校正工作而降低了生产率。如果能用一种实用的方法预先预测焊接变形，将有助于采取适当的措施来控制尺寸精度。本文基于固有应变理论和界面单元，建立了一种预测大型复杂结构件焊接装配过程中从切割到校直过程中累积变形的弹性有限元方法。
Fusion welding processes are widely used to assemble large thin plate structures such as ships, automobiles, and passenger trains because of their high productivity. However, welding-induced distortion often inevitably occurs during the assembly process. Welding distortion not only reduces the fabrication accuracy of a welded structure but also decreases productivity due to correction works. If welding distortion can be predicted using a practical method beforehand, the prediction will be helpful for taking appropriate measures to control the dimensional accuracy. In this study, an elastic finite element method to predict the distortion accumulated in large and complex structures during the welding assembly process from cutting through straightening is developed based on inherent strain theory and interface element.