Dynamic-contact stiffness at the interface between a vibrating rigid sphere and a semi-infinite viscoelastic solid
Dynamic-contact stiffness at the interface between a vibrating rigid sphere and a semi-infinite viscoelastic solid
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DOI：
10.1109/tuffc.2004.1367497
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发表时间：
2004-11-01
影响因子：
3.6
通讯作者：
Hirao, M
中科院分区：
文献类型：
--
作者：
Tian, JY;Ogi, H;Hirao, M
从理论上研究了接触半无限粘弹性固体的刚性球体的振动。刚性球体在受到静力沿垂直方向压缩的同时受到振荡力。界面处的接触压力分布和接触半径随振动而变化。假设振荡力足够小，我们得出接触半径恒定的动态接触压力分布，从而建立了球体和粘弹性固体之间的动态接触刚度。数值计算显示了振动频率、接触半径、泊松比和固体阻尼特性的影响。
Vibration of a rigid sphere contacting a semi-infinite viscoelastic solid is studied theoretically. The rigid sphere is subjected to an oscillating force while being compressed in the vertical direction by a static force. The contact-pressure distribution and contact radius at the interface vary with the oscillation. Assuming sufficiently small oscillating force, we derive the dynamic-contact-pressure distribution with the constant contact radius, which establishes dynamic contact stiffness between the sphere and the viscoelastic solid. Numerical calculations show the influence of vibration frequency, contact radius, Poisson's ratio, and the damping characteristic of the solid.