颗粒介质弹性参数测量方法及装置研究  

Measurement Method and Device for Elastic Parameters of Granular Medium

作　　者：马方园[1] 刘程林[1] 苏煜[1] 史庆藩[2] 王洪涛[3] 马少鹏[1] 

机构地区：[1]北京理工大学宇航学院,北京100081 [2]北京理工大学物理学院,北京100081 [3]清华大学核能与新能源技术研究院,北京100084

出　　处：《实验力学》2014年第3期286-293,共8页Journal of Experimental Mechanics

基　　金：国家自然科学基金11372038;国家自然科学基金11172039

摘　　要：本文发展了一种实施简便的颗粒介质弹性参数测量方法,设计并加工了基于该方法的实验装置。利用加载设备对该实验装置在一个方向上加卸载,在加载方向和与之垂直的另一方向上测量载荷和位移后即可获得颗粒介质的等效弹性模量和泊松比。该实验装置的容器还可方便地调节尺寸,适用于测量不同粒径颗粒堆积在不同大小容器时的弹性参数。本文还研究了尺寸效应的影响,分析了容器尺寸和颗粒粒径分别对介质弹性参数的影响规律。A simple experimental method was developed for elastic parameters measurement of granular medium. Based on this method, an experimental device was designed and processed. Equivalent modulus elastic and Poisson＇s ratio of granular medium can be obtained from the load and displacement captured in both vertical and one of the horizontal directions during loading and unloading along the vertical direction. Using this device, elastic parameters of glass pebble-bed with different sizes were measured in this size adjustable container. Size effect in experiments was taken into account, and the effect of container size and granular diameter on elastic medium parameters were analyzed respectively.

关 键 词：颗粒介质 弹性参数 尺寸效应 

分 类 号：O347.7[理学—固体力学]