Contact Analysis for Joint Interfaces of Machine Tools Based on a 3-D Anisotropic Asperity Model
Contact Analysis for Joint Interfaces of Machine Tools Based on a 3-D Anisotropic Asperity Model
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DOI：
10.4028/www.scientific.net/amr.189-193.114
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发表时间：
2011-02
期刊：
影响因子：
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通讯作者：
H. Liu;Wanhua Zhao;Jun Zhang
中科院分区：
文献类型：
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作者：
H. Liu;Wanhua Zhao;Jun Zhang
本文基于三维统计测量建立了各向异性粗糙表面的三维接触模型，并进行了有限元接触分析。选取粗糙度平均高度h和两个相邻粗糙峰之间的平均峰距Sx和Sy作为粗糙表面的表征参数。有限元仿真结果表明，法向接触压力与法向变形呈指数关系，法向变形与表面的真实的接触压力呈精确的线性关系。最后，在指数关系假设下，通过经验计算得到了结合面的法向接触刚度。
In this paper, a 3-D contact model for anisotropic rough surfaces based on 3-D statistically measurements is established and finite element contact analysis is conducted. The average height of the asperity (h), the average summit distances between two neighboring peaks of asperities (Sx and Sy) are selected as the characterized parameters of the rough surface. Finite element simulation results show that the normal contact pressure has an exponential relation with the normal deformation and an exact linear relationship between the normal deformation and the real contact pressure of the surfaces is obtained. At last, the normal contact stiffness of the joint interface is obtained empirically with the exponential relationship assumption.