华南理工大学学报(自然科学版) ›› 2013, Vol. 41 ›› Issue (2): 101-104,128.doi: 10.3969/j.issn.1000-565X.2013.02.016

• 力学 • 上一篇    下一篇

考虑压剪组合作用力的双粗糙表面接触模型

郑恒斌 黄仕平颜全胜 吴杰 莫增模   

  1. 华南理工大学 土木与交通学院,广东 广州 510640
  • 收稿日期:2012-03-09 修回日期:2012-05-03 出版日期:2013-02-25 发布日期:2013-01-05
  • 通信作者: 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
  • 作者简介: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
  • 基金资助:

    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)

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)

摘要: 粗糙表面的接触分析应用广泛,但其接触机理至今仍不够明确.有鉴于此,文中提出了一种考虑压剪组合作用力的双粗糙面接触模型.该模型用韦伯分布函数来描述双粗糙面的复合粗糙度,用球谐转向扩张函数来描述微凸体接触对接触方向的概率分布.分析表明:粗糙度对接触面的竖向和剪切刚度有明显的影响;接触对的方向分布对剪切刚度的影响显著,是模型中应包含的一个重要参数.数值分析与试验结果有很好的吻合度,说明所提出的模型是有效的.

关键词: 粗糙表面, 接触机理, 微凸体接触, 压剪组合应力, 模型

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