| 滚弯成形解析建模与数值分析 |
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| 引用本文： | 赖松柏,陈同祥,于登云.滚弯成形解析建模与数值分析[J].宇航材料工艺,2011,41(5). |
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| 作者姓名： | 赖松柏 陈同祥 于登云 |
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| 作者单位： | 1. 中国空间技术研究院,北京,100094
2. 中国航天科技集团公司,北京,100048 |
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| 摘 要： | 建立了考虑材料塑性强化的滚弯成形力学分析解析模型,推导出了应力应变、残余应力以及回弹半径计算公式.基于非线性有限元软件,对滚弯成形进行了动态模拟,对应力应变状态、塑性应变分布、残余应力以及回弹等进行了分析计算,结果表明:板料滚弯成形初始效应明显,下压点附近曲率不均匀；采用足够的滚弯时间后,中间段的曲率均匀度很好；成形半径与上辊下压量呈近似幂函数关系；多道次滚弯可以减小两端的曲率波动和最大应力应变.最后通过与滚弯成形试验数据的对比,分析和验证了解析模型与数值模型的适用性和精度.
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| 关 键 词： | 滚弯成形 弹塑性 塑性强化 数值仿真 非线性有限元 回弹 |
Analytical Modeling and Simulation of Roll Bending Process |
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| Lai Songbai,Chen Tongxiang,Yu Dengyun.Analytical Modeling and Simulation of Roll Bending Process[J].Aerospace Materials & Technology,2011,41(5). |
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| Authors: | Lai Songbai Chen Tongxiang Yu Dengyun |
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| Institution: | Lai Songbai1 Chen Tongxiang1 Yu Dengyun2(1 China Academy of Space Technology,Beijing 100094)(2 China Aerospace Science and Technology Corp.,Beijing 100048) |
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| Abstract: | An analytical model is developed through elastic-plastic mechanics,considering strain-hardening of material,and the formulas of stress,strain,residual stress,springback are given.Based on nonlinear FEM package,the dynamic simulation of roll-bending is also carried out.Then stress state,plastic strain distribution,residual stress and springback are analyzed,together with effect of displacement of toproller and multi-pass.The result shows that curvature near the start point is not uniform,but curvature of the... |
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| Keywords: | Roll-bending process Elastic-plastic Strain-hardening Simulation Nonlinear finite element Springback |
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