Journal of South China University of Technology (Natural Science Edition) ›› 2013, Vol. 41 ›› Issue (2): 101-104,128.doi: 10.3969/j.issn.1000-565X.2013.02.016

• Mechanics • Previous Articles     Next Articles

Contact Model of Two Rough Surfaces Under Combined Compression-Shear Load

Zheng Heng-bin Huang Shi-ping Yah Quan-sheng Wu Je Mo Zeng-mo   

  1. School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2012-03-09 Revised:2012-05-03 Online:2013-02-25 Published:2013-01-05
  • Contact: 黄仕平(1982-)，男，博士，讲师，主要从事计算力学及摩擦学研究. E-mail:ctasihuang@scut.edu.cn
  • About author:郑恒斌(1984-)，男，博士生，主要从事桥梁振动理论及轮轨接触耦合分析等的研究．E-mail:hbzh1984@126.com
  • Supported by:

    国家自然科学基金资助项目(11202080，51008077)；华南理工大学中央高校基本科研业务费专项资金资助项目(2012ZB0024)

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Abstract:

Although the contact analysis of rough surface is widely used,the corresponding contact mechanism is still unclear.In order to solve this problem,a contact model of two rough surfaces under combined compression-shear lcad is proposed. In this model.the Weibull distribution function is introduced to describe the combined roughness of asperity contact,and a shifted spherical harmonics expansion is employed to describe the contact orien-tation probability distribution.Analytical results show that roughness greatly affects the normal and shear stiffness,and that the asperity contact orientation,which is an important parameter of the model,also remarkably affects the shear stiffness.The analytical results accord well with the experimental ones,which means that the proposed model is of high effectiveness.

Key words: rough surface, contact mechanism, asperity contact, combined compression-shear stress, models