双光栅弹性模量测量实验方法  

Testing method of elastic modulus based on double grating

作　　者：李柱峰[1] 徐秀平[2] 

机构地区：[1]五邑大学物理实验中心,广东江门529020 [2]五邑大学信息学院,广东江门529020

出　　处：《物理实验》2013年第1期20-22,共3页Physics Experimentation

摘　　要：利用磁耦合双光栅法动态测量了材料的弹性模量,采用电磁能非接触耦合样品激振,激光光拍法微振动非接触检测,使测试样品处于完全自由振动状态,通过激光光拍微弱振动位移测量了样品的固有频率,再通过测量几何尺寸和质量即可计算出样品的弹性模量.A new method of dynamically measuring elastic modulus based on magnetic coupling and double beating was given thoroughly. The sample was excited through non-contact electromagnet- ic coupling and the micro-shaking was measured by using laser light beating to keep the sample in free oscillation. The natural frequency of the sample was measured by the weak vibration displacement of laser light beating. The elastic modulus was calculated by the natural frequency, shape and quality.

关 键 词：磁耦合 双光栅 弹性模量 光拍 

分 类 号：O436.1[机械工程—光学工程]