Investigation of Contact Stiffness Model for Joint Surfaces Based on Domain Expansion Factor and Asperity Interaction

被引：6
|
作者：
Wang R. [1 ]
Zhu L. [1 ]
Zhu C. [2 ]
机构：
[1] School of Mechanical Engineering and Automation, Northeastern University, Shenyang
[2] School of Mechanical Engineering, Shenyang Jianzhu University, Shenyang
来源：
Jixie Gongcheng Xuebao/Journal of Mechanical Engineering | 2018年 / 54卷 / 19期
关键词：
Asperity interaction; Contact stiffness; Fractal theory; Joint surface;
D O I：
10.3901/JME.2018.19.088
中图分类号：
学科分类号：
摘要：
The dynamic characteristics of mechanical equipment can be directly affected by the contact stiffness of joint surfaces. In order to establish a more accurate model of contact stiffness, the elastic deformation characteristics of a single asperity subjected to local load are obtained based on the fractal geometry theory. The distribution function of micro contact truncated area is introduced from the domain extension factor. The fractal model of contact stiffness considering the influence of surface asperity interaction is derived. Also, the surface profile data of the experimental samples are obtained by three-dimensional non-contact measurement to verify the accuracy of the proposed model. According to the structure function method, the surface fractal parameters of each sample are calculated, and then the theoretical contact stiffness and the experimental results are compared and analyzed. It is concluded that the growth rate of normal contact stiffness is related to the critical contact area of rough surface, and the critical contact area determines the proportion of elastic deformation in the joint. After considering the interaction of asperities, the predicted curve of the proposed model is more in line with the relationship between experimental normal load and contact stiffness. © 2018 Journal of Mechanical Engineering.
引用
收藏
页码：88 / 95
页数：7
相关论文
共 21 条
  • [1] Zhang G.P., Huang Y.M., Shi W.H., Et al., Predicting dynamic behaviors of a whole machine tool structure based on computer-aided engineering, International Journal of Machine Tools and Manufacture, 43, 7, pp. 699-706, (2003)
  • [2] Singh B., Nanda B.K., Identification of damping mechanism in layered and welded structures, International Journal of Mechanical Sciences, 63, 1, pp. 37-47, (2012)
  • [3] Quinn D.D., Modal analysis of jointed structures, Journal of Sound and Vibration, 331, 1, pp. 81-93, (2012)
  • [4] Miller J.D., Quinn D.D., A two-sided interface model for dissipation in structural systems with frictional joints, Journal of Sound and Vibration, 321, 1-2, pp. 201-219, (2009)
  • [5] Zhu L., Li H., Wang W., Research on rotary surface topography by orthogonal turn-milling, International Journal of Advanced Manufacturing Technology, 69, 9-12, pp. 2279-2292, (2013)
  • [6] Zhai C., Gan Y., Hanaor D., Et al., The role of surface structure in normal contact stiffness, Experimental Mechanics, 56, 3, pp. 1-10, (2015)
  • [7] Greenwood J., Williamson J.P., Contact of nominally flat surfacesContact of nominally flat surfaces, Proceedings of the Royal Society of London A: Mathematical, Physical and Engineering Sciences., pp. 300-319, (1966)
  • [8] Majumdar A., Bhushan B., Fractal model of elastic-plastic contact between rough surfaces, Journal of Tribology, 113, 1, pp. 1-11, (1991)
  • [9] Wang S., Komvopoulos K., A fractal theory of the interfacial temperature distribution in the slow sliding regime: Part II-multiple domains, elastoplastic contacts and applications, Journal of Tribology, 116, 4, pp. 824-832, (1994)
  • [10] Zhao Y., Maietta D.M., Chang L., An asperity microcontact model incorporating the transition from elastic deformation to fully plastic flow, Journal of Tribology, 122, 1, pp. 86-93, (2000)
123