| 固有应变有限元法预测焊接变形理论及其应用 |
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| 引用本文： | 汪建华,陆皓,魏良武.固有应变有限元法预测焊接变形理论及其应用[J].焊接学报,2002,23(6):36-40. |
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| 作者姓名： | 汪建华 陆皓 魏良武 |
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| 作者单位： | 上海交通大学,上海,200030 |
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| 摘 要： | 介绍了固有应变的概念、固有应变有限元法预测焊接变形的理论和方法。固有应变存在于焊缝与近缝区 ,并与焊接热输入和板厚等因素有关 ,通过试验和热弹塑性分析 ,可以确定它们的关系曲线。固有应变法只需一次弹性有限元计算 ,因而是预测大型复杂结构焊接变形的一种十分有效的方法。文中介绍了若干工程中成功的应用实例
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| 关 键 词： | 焊接变形 残余应力 固有应变 有限元法 |
| 文章编号： | 0253-360X(2002)06-36-05 |
| 收稿时间： | 2002/5/22 0:00:00 |
Prediction of Welding Distortions Based on Theory of Inherent Strain by FEM and Its Application |
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| WANG Jian hu,LU Hao and WEI Liang wu.Prediction of Welding Distortions Based on Theory of Inherent Strain by FEM and Its Application[J].Transactions of The China Welding Institution,2002,23(6):36-40. |
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| Authors: | WANG Jian hu LU Hao and WEI Liang wu |
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| Affiliation: | Shanghai Jiaotong University, Shanghai 200030, China,Shanghai Jiaotong University, Shanghai 200030, China and Shanghai Jiaotong University, Shanghai 200030, China |
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| Abstract: | The prediction of welding distortions based on the theory of inherent strain by FEM is introduced.The inherent strains are assumed to be distributed in the welds and nearby area.The relations between inherent strains and welding parameters based on some experimental curves and the thermo elastic plastic analysis can be determined.This method is more convenient because only elastic analysis is necessary.The effectiveness of the proposed method is demonstrated through the welding distortion analysis of some engineering structures as examples. |
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| Keywords: | welding distortion residual stress inherent strain finite element method |
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