动态法测量固体材料的杨氏模量的一种新方法  

A New Method for Measuring Young's Modulus of Solid Materials by Dynamic Method

作　　者：黄琪莉 钱圳 彭艺 方译权 雷海波 曾育锋[1] HUANG Qi-li;QIAN Zhen;PENG Yi;FANG Yi-quan;LEI Hai-bo;ZENG Yu-feng(South China Normal University,Guangdong Guangzhou 510006)

机构地区：[1]华南师范大学,广东广州510006

出　　处：《大学物理实验》2018年第3期25-28,共4页Physical Experiment of College

摘　　要：结合双光栅对固体材料杨氏模量进行动态测量,激光通过达到共振的样品时,由双光栅将微弱的振动位移通过光拍信号放大,通过示波器输出拍频数,再利用Matlab对相应的拍频数和频率进行曲线拟合,确定样品的固有频率,从而得到一种测量固体样品的杨氏模量的新方法。Using the double grating,the Young＇s modulus of the solid material is measured dynamically.When the laser passes the sample reaching the resonance,the weak vibration displacement is magnified by the light grating signal by the double grating,the beat frequency is output by the oscilloscope,using Matlab to the corresponding frequency and frequency curve fitting and determine the natural frequency of the sample,and a new method of measuring young＇s modulus of solid samples.

关 键 词：双光栅 光拍 共振 杨氏模量 MATLAB 

分 类 号：TG115.5[金属学及工艺—物理冶金] O436.1[金属学及工艺—金属学]