FIBER REINFORCED COMPOSITE MATERIAL PARAMETER IDENTIFYING METHOD BASED ON LASER NONDESTRUCTIVE SCANNING, AND DEVICE

摘要

The invention discloses a fiber reinforced composite material parameter identifying method based on laser nondestructive scanning. The method comprises the following steps: imputing first three order natural frequency, damping ratio and resonance amplitude curve, and setting an identification permissible error value to be 10%, so that fiber longitudinal elasticity modulus E ₁, fiber transverse elasticity modulus E ₂, shear modulus G ₁₂, Poisson's ratio ν ₂₁, fiber longitudinal loss factor η ₂₂, fiber transverse loss factor η ₂₂, and shear loss factor η ₁₂ are obtained. Also provided is a device for implementing the method. The method combines vibration transmission with laser displacement sensing technology to achieve a one-time measurement of the mechanical properties of the test material in all directions, reducing the associated workload.