DYNAMIC CONTACT STIFFNESS OF VIBRATING RIGID SPHERE CONTACTING SEMI-INFINITE TRANSVERSELY ISOTROPIC VISCOELASTIC SOLID
DYNAMIC CONTACT STIFFNESS OF VIBRATING RIGID SPHERE CONTACTING SEMI-INFINITE TRANSVERSELY ISOTROPIC VISCOELASTIC SOLID
复制标题
振动刚性球接触半无限横观各向同性粘弹性固体的动接触刚度
DOI：
10.1007/s10338-008-0870-x
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发表时间：
2008-12-01
影响因子：
2.2
通讯作者：
Xie, Zhoumin
中科院分区：
文献类型：
--
作者：
Tian, Jiayong;Xie, Zhoumin
研究了振动刚性球与半无限横观各向同性粘弹性固体界面处的动态接触刚度。在垂直方向上叠加静压的振荡力激励刚性球体的振动，从而引起接触区域内接触半径和接触压力分布的变化。在振荡力足够小的假设下，得到了接触半径恒定的动态接触压力分布，这给出了刚性球与半无限固体交界处的动态接触刚度。数值计算给出了球体的振动频率和横观各向同性固体的弹性常数对动态接触刚度的影响，这有利于利用共振超声显微镜中振子的共振频移来定量评价单个六方晶体的弹性常数和取向。
Dynamic contact stiffness at the interface between a vibrating rigid sphere and a semi-infinite transversely isotropic viscoelastic solid is investigated. An oscillating force super-imposed onto a static compressive force in the vertical direction excites the vibration of a rigid sphere, which causes variable contact radius and contact pressure distribution in the contact region. The assumption of a sufficiently small oscillating force yields a dynamic contact-pressure distribution of a constant contact radius, which gives dynamic contact stiffness at the interface between the rigid sphere and the semi-infinite solid. Numerical calculations show the influence of vibration frequency of the sphere, and elastic constants of the transversely isotropic solid on dynamic contact stiffness, which benefits quantitative evaluation of elastic constants and orientation of single hexagonal grains by resonance-frequency shifts of the oscillator in resonance ultrasound microscopy.