零件真实粗糙表面构建及微观接触性能分析
|
摘要
目前对于微观粗糙表面模型的构建主要采用统计数学方法和分形方法,建模的前提基于大量假设和简化,不能真实反映表面形貌特征。因此提出了采用三维数字化测量与逆向工程相结合建立零件真实粗糙表面的方法,并分析微观接触性能。利用三维形貌测量仪测量得到真实粗糙表面形貌数据,并经过数据精简、去噪处理,采用逆向建模方法得到真实粗糙表面的三维实体模型;应用有限元分析技术,分析粗糙表面接触性能,包括结合面接触应力随载荷变化规律、不同加工方式零件界面真实接触面积变化规律,以及结合面受力-变形关系等。该方法有利于揭示零件微观界面接触机理,为进一步研究宏微观接触性能提供了方法参考。
At present,the study of micro rough surface model mainly adopts mathematical statistics method and fractal method. However these modeling methods are based on a large number of assumption and simplification,which cannot reflect the surface topography characteristic factually. Thus, a method of parts real rough surface based on the 3 D digital measurement and reverse engineering is proposed to analyze the micro contact performance. The real rough surface topography data is obtained by 3 D profile measurement instrument,and the 3 D entity model of real rough surface is established by reverse modeling after data compaction and denoising. The contact performance of rough surface,including the change of jointing surface contact stress to load,the real contact area of parts interface to different processing method,the relationship of jointing surface force to deformation,etc.,is analyzed with finite element analysis technology. This method helps to uncover contact mechanism of parts micro interface,and provides reference method for further study of macro and micro contact performance.
At present,the study of micro rough surface model mainly adopts mathematical statistics method and fractal method. However these modeling methods are based on a large number of assumption and simplification,which cannot reflect the surface topography characteristic factually. Thus, a method of parts real rough surface based on the 3 D digital measurement and reverse engineering is proposed to analyze the micro contact performance. The real rough surface topography data is obtained by 3 D profile measurement instrument,and the 3 D entity model of real rough surface is established by reverse modeling after data compaction and denoising. The contact performance of rough surface,including the change of jointing surface contact stress to load,the real contact area of parts interface to different processing method,the relationship of jointing surface force to deformation,etc.,is analyzed with finite element analysis technology. This method helps to uncover contact mechanism of parts micro interface,and provides reference method for further study of macro and micro contact performance.
引文
[1]Levina Z M.Research on the static stiffness of joints in machine tools-advances in machine tool design and research 1967[J].Proceedings of the8th international M.T.D.R.Conference.1967:737-758.
[2]庄艳,李宝童,洪军.一种结合面法向接触刚度计算模型的构建[J].上海交通大学学报,2013,47(2):180-186.(Zhuang Yan,Li Bao-tong,Hong Jun.A normal contact stiffness model of the interface[J].Journal of Shanghai Jiaotong University,2013,47(2):180-186.)
[3]Greenwood J A,Williams J B.Contact of nominally flat surfaces[J].P Roy Soc Lond A Mat,1966,295(1422):300-319
[4]Chang W R,Etsion I,Bogy D B.An elastic-plastic model for the contact of rough surfaces[J].ASME Journal of Tribology,1987,109(2):257-263.
[5]Majumdar A,Bhushan B.Fractal model of elastic-plastic contact between rough surfaces[J].ASME Journal of Tribology,1991,113(1):1-11.
[6]Wang F S,Block J M,Chen W W.A multilevel model for elastic-plastic contact between a sphere and a flat rough surface[J].ASME Journal of Tribology,2009,131(2):1-6.
[7]Poulios K,Klit P.Implementation and applications of a finite-element model for the contact between rough surfaces[J].Wear,2013,303(1-2):1-8.
[8]李辉光,刘恒,虞烈.粗糙机械结合面的接触刚度研究[J].西安:西安交通大学学报,2011,45(6):69-74.(Li Hui-guang,Liu Heng,Yu Lie.Contact stiffness of rough mechanical joint surface[J].Xi’an:Journal of Xi’an Jiaotong University,2011,45(6):69-74.)
[9]Yastrebov V A,Durand J,Proudhon H.Rough surface contact analysis by means of the finite element method and of a new reduced model[J].Compets Rendus Mecanique,2011,339(7-8):473-490.
[10]杨国庆,熊美华,洪军.3D粗糙表面的数字化表征与接触特性分析[J].西安交通大学学报,2012,46(11):58-63.(Yang Guo-qing,Xiong Mei-hua,Hong Jun.Numerical characterization and contact performances for 3D rough surfaces[J].Journal of Xi’an Jiaotong University,2012,46(11):58-63.
[11]瞿珏,王崴,肖强明.基于ANSYS的真实粗糙表面微观接触分析[J].机械设计与制造,2012(8):72-74.(Qu Jue,Wang Wei,Xiao Qiang-ming.Microcontact analysis for actual rough surfaces based on ansys[J].Machinery Design and Manufacture,2012(8):72-74.)
[12]Kogut L,Etsion I.Elastic-plastic contact analysis of sphere and a rigid flat[J].ASME Journal of Applied Mechanics,2002(69):657-663.
[2]庄艳,李宝童,洪军.一种结合面法向接触刚度计算模型的构建[J].上海交通大学学报,2013,47(2):180-186.(Zhuang Yan,Li Bao-tong,Hong Jun.A normal contact stiffness model of the interface[J].Journal of Shanghai Jiaotong University,2013,47(2):180-186.)
[3]Greenwood J A,Williams J B.Contact of nominally flat surfaces[J].P Roy Soc Lond A Mat,1966,295(1422):300-319
[4]Chang W R,Etsion I,Bogy D B.An elastic-plastic model for the contact of rough surfaces[J].ASME Journal of Tribology,1987,109(2):257-263.
[5]Majumdar A,Bhushan B.Fractal model of elastic-plastic contact between rough surfaces[J].ASME Journal of Tribology,1991,113(1):1-11.
[6]Wang F S,Block J M,Chen W W.A multilevel model for elastic-plastic contact between a sphere and a flat rough surface[J].ASME Journal of Tribology,2009,131(2):1-6.
[7]Poulios K,Klit P.Implementation and applications of a finite-element model for the contact between rough surfaces[J].Wear,2013,303(1-2):1-8.
[8]李辉光,刘恒,虞烈.粗糙机械结合面的接触刚度研究[J].西安:西安交通大学学报,2011,45(6):69-74.(Li Hui-guang,Liu Heng,Yu Lie.Contact stiffness of rough mechanical joint surface[J].Xi’an:Journal of Xi’an Jiaotong University,2011,45(6):69-74.)
[9]Yastrebov V A,Durand J,Proudhon H.Rough surface contact analysis by means of the finite element method and of a new reduced model[J].Compets Rendus Mecanique,2011,339(7-8):473-490.
[10]杨国庆,熊美华,洪军.3D粗糙表面的数字化表征与接触特性分析[J].西安交通大学学报,2012,46(11):58-63.(Yang Guo-qing,Xiong Mei-hua,Hong Jun.Numerical characterization and contact performances for 3D rough surfaces[J].Journal of Xi’an Jiaotong University,2012,46(11):58-63.
[11]瞿珏,王崴,肖强明.基于ANSYS的真实粗糙表面微观接触分析[J].机械设计与制造,2012(8):72-74.(Qu Jue,Wang Wei,Xiao Qiang-ming.Microcontact analysis for actual rough surfaces based on ansys[J].Machinery Design and Manufacture,2012(8):72-74.)
[12]Kogut L,Etsion I.Elastic-plastic contact analysis of sphere and a rigid flat[J].ASME Journal of Applied Mechanics,2002(69):657-663.