材料杨氏弹性模量的简易测量

The Simple Measurement of Young Modulus of Materials

由于杨氏弹性模量是描述材料力学性质的重要物理量，因此，对于材料的杨氏弹性模量的测量在实际应用中有着重要意义。而传统的实验室方法是＂光杠杆法＂和＂悬架水准法＂，这两种方法的实验结果误差较大。采用本文中所述的＂单缝衍射法＂、＂等厚干涉法＂具有原理简单、操作方便，在条件简陋的情况下也能得到较精确的结果。

Young modulus is a important physical quantity which discribes the mechanical property of materials.It is significant and useful to study the measurement of young modulus of materials.The traditional method in Labortory is optical level and suspension level,but the two methods can cause larger error.In this article,we use the method of single slit diffraction and equal thickness interference,which is simple to operate and can acquire more accurate results even under poor condition.