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Linear relationship of normal and tangential contact stiffness with load
Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences ( IF 3.5 ) Pub Date : 2020-11-01 , DOI: 10.1098/rspa.2020.0329
K S Parel 1 , R J Paynter 1 , D Nowell 1
Affiliation  

Measurements with digital image correlation of normal and tangential contact stiffness for ground Ti-6Al-4V interfaces suggest a linear relationship between normal contact stiffness and normal load and a linear relationship between tangential contact stiffness and tangential load. The normal contact stiffness is observed approximately to be inversely proportional to an equivalent surface roughness parameter, defined for two surfaces in contact. The ratio of the tangential contact stiffness to the normal contact stiffness at the start of tangential loading is seen to be given approximately by the Mindlin ratio. A simple empirical model is proposed to estimate both the normal and tangential contact stiffness at different loads for a ground Ti-6Al-4V interface, on the basis of the equivalent surface roughness and the coefficient of friction.

中文翻译:

法向和切向接触刚度与载荷的线性关系

地面 Ti-6Al-4V 界面的法向和切向接触刚度的数字图像相关性测量表明法向接触刚度和法向载荷之间存在线性关系,以及切向接触刚度和切向载荷之间存在线性关系。观察到法向接触刚度大约与为两个接触表面定义的等效表面粗糙度参数成反比。在切向加载开始时,切向接触刚度与法向接触刚度的比率大约由 Mindlin 比率给出。基于等效表面粗糙度和摩擦系数,提出了一个简单的经验模型来估计地面 Ti-6Al-4V 界面在不同载荷下的法向和切向接触刚度。
更新日期:2020-11-01
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