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Testing method of elastic modulus based on double grating

LI Zhu-fenga,XU Xiu-pingb(a.Center of Physics Experiment;b.College of Information, Wuyi University,Jiangmeng 529020,China)  
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 electromagnetic 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.
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