Nonlinear Young’s Modulus of New Red Sandstone:Experimental Studies

Young’s modulus of New Red Sandstone was investigated experimentally to gain insight into its nonlinear nature.A large experimental programme was carried out by applying a controllable quasi-static and dynamic uniaxial loading to 286 dry sandstone samples of four different sizes.The static and dynamic tests,similar to those aiming at determining the uniaxial compressive strength,were conducted using the state-of-the-art experimental facilities at the University of Aberdeen including a custom-built small experimental rig for inducing a dynamic uniaxial compressive load via a piezoelectric transducer.The obtained results have confirmed a complex nature of Young’s modulus of sandstone.Specifically,under a harmonic dynamic loading,it shows strongly nonlinear behaviour,which is hardening and softening with respect to frequency and amplitude of the dynamic loading,respectively.

耳石系统的动力学响应

研究了耳石器官的动力学响应 ,得到的理论结果包括了Grant等人的所有结果并包含三种可能的动力学响应模式 .为定量了解耳石器官的动力学问题 ,提供了可靠的理论依据 .同时对于耳石器官内顶膜的Young′s模量 。

杨氏实验的理论探讨

杨氏实验在物理学中有着重要的作用,包含着光的干涉、衍射、调制以及量子态叠加等内容,既展现了光的波动理论的意义和魅力,又表现了量子理论的深刻内涵。本文从双缝干涉、双缝衍射、双缝调制以及双缝量子态叠加等几个层面上探讨了杨氏实验所蕴含的基本理论,有助于光学理论的研究与教学。

动态杨氏模量实验的系统误差产生机理

从动态杨氏模量实验共振基频存在系统误差入手，认为产生这种误差的原因，是由理论上杆的自由横振动模型和实验上具有某种约束条件的小阻尼受迫振动模型之间差异造成的。