| 基于灰色系统理论的20CrMnTi晶粒扭压变形均匀化的研究 |
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| 引用本文： | 许锋,薛克敏,李萍,赵茂俞. 基于灰色系统理论的20CrMnTi晶粒扭压变形均匀化的研究[J]. 金属功能材料, 2011, 18(1): 18-21 |
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| 作者姓名： | 许锋 薛克敏 李萍 赵茂俞 |
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| 作者单位： | 1. 合肥工业大学材料科学与工程学院,安徽,合肥,230009
2. 合肥学院机械工程系,安徽,合肥,230022 |
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| 基金项目： | 安徽省二00八科技攻关计划面上项目(08010202132) |
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| 摘 要： | 在温度、高径比、扭转角速度、挤压速度、摩擦因子为自变量的条件下,以正交实验为设计方案,模拟20CrMnTi扭压成形,获得成形工艺参数与等效应力、等效应变、等效应变速率等质量目标函数的数据。利用灰色系统理论,分别计算成形工艺参数对单目标的关联系数和多目标函数的关联度,将多目标转化为单目标优化问题。进一步计算各成形工艺参数的平均关联度,用优化的工艺参数进行有限元模拟验证,并经过物理实验,结果表明优化后20CrMnTi晶粒变形均匀程度明显提高。
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| 关 键 词： | 20CrMnTi 模拟 灰色系统理论 扭压 多目标优化 |
Research of Pressure-torsion Forming for 20CrMnTi Grain Homogeneous Deformation Based on Grey Theory System |
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| XU Feng,XUE Ke-min,LI Ping,ZHAO Mao-yu. Research of Pressure-torsion Forming for 20CrMnTi Grain Homogeneous Deformation Based on Grey Theory System[J]. Metallic Functional Materials, 2011, 18(1): 18-21 |
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| Authors: | XU Feng XUE Ke-min LI Ping ZHAO Mao-yu |
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| Affiliation: | XU Feng1,XUE Ke-min1,LI Ping1,ZHAO Mao-yu2 (1.School of Material Science and Engineering,Hefei University of Technology,Hefei 230009,Anhui,China)(2.Department of Mechanical Engineering,Hefei University,Hefei 230022,China) |
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| Abstract: | Pressuer-torsion for 20CrMnTi grain refining was numerical simulated forming by FEM while temperature,height-todiameter ratio,angle of torsion speed,extrusion speed,friction factor were independent variables,acquiring the data about the stress-effective,strain-effective,strain-rate-effective by orthogonal experiment.Then the grey relational generating between forming process and the single objective function,the grey rational grade of multi-objective were calculated,disposed by the grey theory system,thus t... |
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| Keywords: | 20CrMnTi simulation grey theory system pressure-torsion multi-objective optimization |
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