| 冷弯方管纵向残余应力分布的数值分析 |
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| 引用本文： | 侯刚,童乐为,陈以一.冷弯方管纵向残余应力分布的数值分析[J].同济大学学报(自然科学版),2011,39(8):1138-1144. |
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| 作者姓名： | 侯刚 童乐为 陈以一 |
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| 作者单位： | 1. 同济大学土木工程学院建筑工程系,上海,200092
2. 同济大学土木工程学院建筑工程系,上海 200092;同济大学土木工程防灾国家重点实验室,上海 200092 |
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| 基金项目： | 宝钢钢结构住宅成套技术开发及建筑用钢产业链研究(国际钢协LivingSteel项目) |
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| 摘 要： | 应用有限元数值技术,模拟了冷弯方管的辊弯成型与回弹过程中所产生的截面纵向残余应力分布,并分析了冷弯方管宽度、壁厚和钢材屈服强度等参数对其纵向残余应力分布的影响效应.研究表明冷弯方管纵向残余应力沿壁厚方向呈现非线性分布,外壁受拉、内壁受压,外壁与内壁在数值上基本相等;弯角部位和平板部分的纵向残余应力幅值分别达到冷弯方管钢材屈服强度的50%和45%;随着壁厚的增加,边长小的冷弯方管纵向残余应力有所提高,而边长大的冷弯方管这种趋势并不明显;随着边长的增大,冷弯方管纵向残余应力减小;随着冷弯方管屈服强度的变化,纵向残余应力与屈服强度的比值变化不大.
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| 关 键 词： | 冷弯方管 成型工艺 残余应力分布 有限元分析 |
| 收稿时间： | 2010/8/17 0:00:00 |
| 修稿时间： | 6/3/2011 9:22:01 AM |
Numerical Analysis of Longitudinal Residual Stress Distribution in Cold formed Square Hollow Sections |
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| HOU Gang,TONG Lewei and CHEN Yiyi.Numerical Analysis of Longitudinal Residual Stress Distribution in Cold formed Square Hollow Sections[J].Journal of Tongji University(Natural Science),2011,39(8):1138-1144. |
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| Authors: | HOU Gang TONG Lewei and CHEN Yiyi |
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| Institution: | Department of Building Engineering,College of Civil Engineering,Tongji University,Shanghai 200092,China;Department of Building Engineering,College of Civil Engineering,Tongji University,Shanghai 200092,China;State Key Laboratory for Disaster Reduction in Civil Engineering,Tongji University,Shanghai 200092,China;Department of Building Engineering,College of Civil Engineering,Tongji University,Shanghai 200092,China;State Key Laboratory for Disaster Reduction in Civil Engineering,Tongji University,Shanghai 200092,China |
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| Abstract: | Finite element numerical technique is used in the paper to simulate the longitudinal residual stress(LRS) distirbution in a cold-formed square hollow section(CFSHS) which is produced during its roll-forming and spring-back process,and then to investigate the effects of CFSHS's width,wall thickness and yield strength on the LRS ditribution.It is concluded that LRS along the CFSHS's wall thickness presents a feature of a nonlinear distribution,tension at the outside surface but compression at the inside surfa... |
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| Keywords: | cold-formed square hollow section forming technology residual stress distribution numerical analysis |
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