| 航空铝合金7050-T7451高速切削加工中流动应力模型 |
| |
| 引用本文： | 付秀丽,艾兴,万熠,张松.航空铝合金7050-T7451高速切削加工中流动应力模型[J].南京航空航天大学学报(英文版),2007,24(2):139-144. |
| |
| 作者姓名： | 付秀丽 艾兴 万熠 张松 |
| |
| 作者单位： | 山东大学机械工程学院,济南,250061,中国 |
| |
| 摘 要： | 通过对分离式Hopkinson压杆进行高温动态压缩实验,得到在冲击压缩中材料航空铝合金7050-T7451在室温到高温550℃的应变、应变率与应力间的数据依赖关系.利用高速切削实验及有限元模拟相结合对该数据关系进行修正以适合高速切削加工的"高温"、"高应变率"及"大应变"状态.选择综合考虑温度软化效应,应变强化和应变率强化效应的经验Johnson-Cook模型,对其数据关系进行量化的描述,并确定铝合金7050-T7451流动应力本构模型中材料常数的值,最后建立了铝合金7050-T7451的本构模型.以实验和模拟中输出主切削力为比较指标,验证了所建模型的正确性.
|
| 关 键 词： | 高速切削 流动应力模型 SHPB压缩实验 有限元模拟 high-speed cutting flow stress models SHPB compression experiment FEM simulation 航空铝合金 切削加工 流动 应力模型 CUTTING ALUMINUM ALLOY MODELING STRESS constitutive model reasonable matching values cutting force results established simulation verification material constants strain hardening thermal |
| 文章编号： | 1005-1120（2007）02-0139-06 |
| 修稿时间： | 2006-06-272006-09-06 |
FLOW STRESS MODELING FOR AERONAUTICAL ALUMINUM ALLOY 7050-T7451 IN HIGH-SPEED CUTTING |
| |
| Fu Xiuli,Ai Xing,Wan Yi,Zhang Song.FLOW STRESS MODELING FOR AERONAUTICAL ALUMINUM ALLOY 7050-T7451 IN HIGH-SPEED CUTTING[J].Transactions of Nanjing University of Aeronautics & Astronautics,2007,24(2):139-144. |
| |
| Authors: | Fu Xiuli Ai Xing Wan Yi Zhang Song |
| |
| Institution: | School of Mechanical Engineering, Shandong University, Jinan, 250061, P.R. China |
| |
| Abstract: | The high temperature split Hopkinson pressure bar (SHPB) compression experiment is conducted to obtain the data relationship among strain, strain rate and flow stress from room temperature to 550 C for aeronautical aluminum alloy 7050-T7451. Combined high-speed orthogonal cutting experiments with the cutting process simulations, the data relationship of high temperature, high strain rate and large strain in high-speed cutting is modified. The Johnson-Cook empirical model considering the effects of strain hardening, strain rate hardening and thermal softening is selected to describe the data relationship in high-speed cutting, and the material constants of flow stress constitutive model for aluminum alloy 7050-T7451 are determined. Finally, the constitutive model of aluminum alloy 7050-T7451 is established through experiment and simulation verification in high-speed cutting. The model is proved to be reasonable by matching the measured values of the cutting force with the estimated results from FEM simulations. |
| |
| Keywords: | high-speed cutting flow stress models SHPB compression experiment FEM simulation |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
