Applications of inherent strain and interface element to simulation of welding deformation in thin plate structures

作者：Murakawa Hidekazu; Deng Dean^*; Ma Ninshu; Wang Jiangchao

来源：Computational Materials Science, 2012, 51(1): 43-52.

DOI：10.1016/j.commatsci.2011.06.040

• Welding distortion
• Inherent strain
• Interface element
• Numerical simulation
• Assembly sequence

Welding-induced distortion not only reduces largely manufacturing accuracy but also decreases significantly productivity due to correction works. If welding distortion can be predicted through a simple and practical method beforehand, the predictions will be helpful for taking active as well as appropriate measures to control the dimension accuracy. Based on inherent strain theory and interface element formulation, we developed a practical prediction system to compute the accumulated distortion during the welding assembly process in the current study. Using the developed prediction method, we calculated the welding distortion in a thin plate structure with considering both the shrinkage due to heat input and the gap/misalignment generated during assembly process. Meanwhile, we investigated the influences of assembly sequence and gap correction on the final distortion.

• 出版日期2012-1
• 单位重庆大学