| 基于体壳耦合模型的钛合金薄板激光焊接变形分析 |
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| 引用本文： | 陈中革,郭涛,张建勋.基于体壳耦合模型的钛合金薄板激光焊接变形分析[J].焊接学报,2016,37(5):45-48. |
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| 作者姓名： | 陈中革 郭涛 张建勋 |
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| 作者单位： | 1.中航飞机股份有限公司西安飞机分公司, 西安 710089 |
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| 基金项目： | 国家自然科学基金资助项目(51375370) |
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| 摘 要： | 针对钛合金薄板激光焊接变形的数值模拟提出了一种高效体壳耦合模型,即在近缝区采用实体单元以充分表征焊接过程中板材厚度方向的热/力学不均匀性,在远离焊缝区采用壳单元建模以减小单元数量,在两种单元的界面建立接触并采用MPC算法进行焊接变形计算. 采用体壳耦合模型与三维实体模型分别计算了0.8 mm厚TC1钛合金激光焊接变形. 结果表明,两种模型的计算值均与试验测量值相近,但体壳耦合模型耗时仅为三维实体模型的30%左右,表明体壳耦合模型在保证计算精度的前提下能显著提高计算效率.
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| 关 键 词： | 钛合金薄板 焊接变形 有限元 体壳耦合 |
| 收稿时间： | 2014/7/20 0:00:00 |
Analysis on laser welding deformation of titanium alloy thin plate based on solid-shell coupling model |
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| CHEN Zhongge,GUO Tao and ZHANG Jianxun.Analysis on laser welding deformation of titanium alloy thin plate based on solid-shell coupling model[J].Transactions of The China Welding Institution,2016,37(5):45-48. |
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| Authors: | CHEN Zhongge GUO Tao and ZHANG Jianxun |
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| Affiliation: | 1.AVIC Xi'an aircraft industry limited company, Xi'an 710089, China2.Xi'an Jiaotong University, State Key Laboratory for Mechanical Behavior of materials, Xi'an 710049, China |
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| Abstract: | An efficient solid-shell coupling model was proposed to simulate laser welding deformation of titanium alloy thin plate. The elements used in the region near the weld seam were solid elements to characterize the thermal/mechanical nonuniformity along plate thickness during welding process, while the elements used in the region away from the weld zone were shell elements to reduce the number of the elements. Contacts were established at the interface of solid and shell elements, and welding deformation was calculated using MPC algorithm. Laser welding deformation of TC1 titanium alloy with 0.8 mm in thickness was simulated by solid-shell coupling model and three-dimensional solid model, respectively. The simulated results indicate that the calculation results of the two models both match well with the experimental deformation. The calculation time of solid-shell coupling model is about 30% of the three-dimensional solid model. So it can be concluded that the solid-shell coupling model can not only predict the welding deformation accurately in the welding process, but also improve the computational efficiency. |
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| Keywords: | titanium alloy thin plate welding deformation finite element solid-shell coupling model |
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