Elastic constants of natural quartz
Elastic constants of natural quartz
复制标题
DOI：
10.1121/1.1593063
复制
发表时间：
2003-08-01
影响因子：
2.4
通讯作者：
Kim, S
中科院分区：
文献类型：
--
作者：
Heyliger, P;Ledbetter, H;Kim, S
用共振超声光谱法（RUS）测量了天然石英球的弹性常数。球体近无牵引力振动频率的测量值与弹性动力学理论的预测频率相匹配，并对弹性常数进行了优化估计，使这些频率组之间的差异达到最小值。目前的计算模型，虽然基于早期的方法，是RUS的第一个应用到三角对称球。石英显示出六个独立的弹性常数，我们对这些常数的估计与用其他方法计算的结果接近。除C-14外，经1%质量密度校正后，天然石英与人工石英的弹性常数基本一致。天然石英具有较高的内摩擦。(C) 2003年美国声学学会。
The elastic constants of a natural-quartz sphere using resonance-ultrasound spectroscopy (RUS) are measured. The measurements of the near-traction-free vibrational frequencies of the sphere are matched with the predicted frequencies from the dynamic theory of elasticity, with optimized estimates for the elastic constants driving the differences between these sets of frequencies to a minimal value. The present computational model, although based on earlier approaches, is the first application of RUS to trigonal-symmetry spheres. Quartz shows six independent elastic constants, and our estimates of these constants are close to those computed by other means. Except for C-14, after a 1% mass-density correction, natural quartz and cultured quartz show the same elastic constants. Natural quartz shows higher internal frictions. (C) 2003 Acoustical Society of America.