AIR-COUPLED ULTRASONIC EVALUATION TECHNOLOGY FOR VISCOELASTIC PROPERTY OF MATERIALS
LIN DanYi
ZHU LiJun
ZHANG YiHua
Abstract：In view of the deficiencies of the main evaluation methods of viscoelasticity,the air-coupled ultrasonic evaluation technology was introduced with the characteristics of non-contact and nondestructive.Based on the theory of viscoelasticity and air-coupled ultrasonic,the theory and experimental method of the air-coupled ultrasonic evaluation for viscoelsaticity were proposed.The storage modulus,loss modulus and loss angle tangent were achieved through the measurement of reflection coefficient,wave velocity and attenuation coefficient.The testing study of air-coupled ultrasonic evaluation for viscoelasticity was carried out,the method was compared with the DMA testing,the results were very consistent.The advancement and accuracy of air-coupled ultrasonic evaluation for viscoelsaticity was proved.
Keywords：Air-coupled ultrasonicMaterial viscoelasticityNondestructive evaluation
Publication Date：2018-01-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：5( 68-72 )