航空结构件加工变形仿真关键技术

张洪伟; 张以都; 赵晓慈; 吴琼

航空结构件加工变形仿真关键技术

北京航空航天大学机械工程及自动化学院, 北京 100083

基金项目: 航空"十五"支撑技术资助项目

详细信息

作者简介:
张洪伟(1978－),男,山东济南人,博士生,zhanghw@me.buaa.edu.cn.

中图分类号: TP 391.77
计量
- 文章访问数: 3091
- HTML全文浏览量: 114
- PDF下载量: 1384
- 被引次数: 0
出版历程
- 收稿日期: 2007-03-21
- 网络出版日期: 2008-02-29

Key techniques in simulation of machining distortion for aeronautical monolithic component

School of Mechanical Engineering and Automation, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

摘要

摘要: 对航空结构件铣削加工变形仿真的关键技术进行了深入研究.编制残余应力施加通用程序,建立包含有初始残余应力的加工变形有限元预测模型;由于铣削加工,毛坯体变为薄壁工件,在进行有限元仿真过程中,提出体-壳单元与实体单元的混合单元建模方法,以提高计算效率及便于后续研究;针对工件与工作台单面约束的接触作用及其它工程中的类似单面约束问题,提出将工件视为弹性体,工作台视为刚性体,转化为接触方式进行纯压缩边界条件的模拟,对某典型工件进行了有限元仿真并与模态试验结果对比,验证了其有效性和准确性;基于生死单元技术进行材料去除模拟.通过上述关键技术的理论研究及应用,实现了航空结构件加工变形过程的有限元仿真.
- 加工变形 /
- 单面约束 /
- 有限元法 /
- 接触 /
- 体-壳单元
Abstract: Key techniques in the process of simulating machining distortion in milling due to residual stresses were researched. The calculation program was developed to generate residual stresses file and the finite element model containing original residual stresses was established. The thin-walled structure was obtained after milling machining. In order to improve simulation accuracy, a new method was carried out to model the finite element model by combining solid-shell element with solid element. Considering the contact action by unilateral constraint between workpiece and baseplate when the workpiece was located by press clamps, contact method was put forward to simulate the effect of the compression only supported by thinking of workpiece as elastic body while workbase as rigid body. The modal analysis results of representative component based on finite element simulation were compared with experiment results. The validity and reliability were verified. The material removal was realized using element birth-death. The finite element simulation of machining distortion for aerospace structures was realized by using these techniques.
- machining distortion /
- unilateral constraint /
- finite element method /
- contact /
- solid-shell element

HTML全文

参考文献(1)

[1] Brinmsmeier E,Hannover J,Cammett T,et al. Residual stress-measurement and cause in machining process[J].Annals of the CIRP,1982,31(2):491-509 [2] Heiz A,Haszler A,Keidel C,et al. Recent development in aluminum alloy for aerospace application[J].Mater Sci Eng A,1999,A280:102-107 [3] 王兆峻.基于残余应力释放与重分布的薄壁零件加工变形研究 .北京:北京航空航天大学机械工程及自动化学院,2005 Wang Zhaojun. Research on machining distortion based on the relief and redistribution of residual stresses . Beijing:School of Mechanical Engineering and Automation,Beijing University of Aeronautics and Astronautics,2005(in Chinese) [4] 赵丽丽.航空铝合金预拉伸板残余应力及加工变形研究 .北京:北京航空航天大学机械工程及自动化学院,2006 Zhao Lili. Research on residual stresses & machining of machining deformation of aeronautic aluminum alloy pre-stretching board . Beijing:School of Mechanical Engineering and Automation,Beijing University of Aeronautics and Astronautics,2006(in Chinese) [5] 董兆伟.铝合金整体结构件铣削加工残余应力及变形研究 .北京:北京航空航天大学机械工程及自动化学院,2006 Dong Zhaowei.Study on the milling residual stress and deformation of the aluminum alloy integrated framework .Beijing:School of Mechanical Engineering and Automation,Beijing University of Aeronautics and Astronautics,2006(in Chinese) [6] 王立涛.关于航空框类结构件铣削加工残余应力和变形机理的研究 . 杭州:浙江大学机械与能源工程学院,2003 Wang Litao. Study on residual stresses and distortion theory of aeronautica frame structure in the milling . Hangzhou:College of Mechanical and Energy Engineering, Zhejiang University, 2003(in Chinese) [7] 黄志刚.航空结构件铣削加工变形的有限元模拟理论及方法研究 .杭州:浙江大学机械与能源工程学院,2003 Huang Zhigang.Study on finite element simulation of distortion due to milling process for aerospace molithic components . Hangzhou:College of Mechanical and Energy Engineering, Zhejiang University, 2003(in Chinese) [8] 王秋成,柯映林,章巧芳.7075铝合金板材残余应力深度梯度的评估[J].航空学报,2003,24(4):336-338 Wang Qiucheng,Ke Yinglin,Zhang Qiaofang.Evaluation of residual stress depth profiling in 7075 aluminum alloy plates[J].Acta Aeronautica et Astronautica Sinica,2003,24(4):336-338(in Chinese) [9] Alves de Sousa R J, Yoon J W, Cardoso R P R, et al.On the use of a reduced enhanced solid-shell(RESS) element for sheet forming simulations[J]. International Journal of Plasticity,2007(23):490-515 [10] Parente M P L, Fontes Valente R A,Natal Jorge R M, et al. Sheet metal forming simulation using EAS solid-shell finite elements[J]. Finite Elements in Analysis and Design,2006,42:1137-1149 [11] 王勖成.有限单元法[M].北京:清华大学出版社,2003 Wang Xucheng. Finite element method[M]. Beijing:Tsinghua University Press,2003(in Chinese) [12] 张毅.单面约束系统动力学研究进展[J].力学与实践,2000,22(6):8-11 Zhang Yi. Advances in dynamics of systems with unilateral constraints[J].

施引文献

资源附件(0)

访问统计