Effects of Adhesive Characteristic on the Test Results of Damping Material's DMP

In the measurement of damping material's dynamic mechanical performance(DMP) using flexural resonating cantilever beam method,the specimen's adhesive characteristic influences the test precision and accuracy. Taking its effect into account,the improved measurement equations based on the resonance method are presented. The simulated results show that,for the sake of weakening the adhesive's influence on the measured results,the adhesive should be spreaded as thin as possible when specimen is prepared,the adhesive's density and loss factor should be selected as small as possible also,and its Young's modulus should be selected according to the damping material being measured;the same adhesion condition effects differently on the test results of different damping materials,i.e. the error due to the adhesive is more inconspicuous if the damping layer has bigger thickness,modulus,loss factor and a certain density according to the damping material being measured. These conclusions provide theoretical basis for selecting adhesive,improving adhesion technology,and designing specimen.

In the measurement of damping material＇s dynamic mechanical performance （DMP） using flexural resonating cantilever beam method, the specimen＇s adhesive characteristic influences the test precision and accuracy. Taking its effect into account, the improved measurement equations based on the resonance method are presented. The simulated resuits show that, for the sake of weakening the adhesive＇s influence on the measured results, the adhesive should be spreaded as thin as possible when specimen is prepared, the adhesive＇s density and loss factor should be selected as small as possible also, and its Young＇s modulus should be selected according to the damping material being measured; the same adhesion condition effects differently on the test results of different damping materials, i.e. the error due to the adhesive is more inconspicuous if the damping layer has bigger thickness, modulus, loss factor and a certain density according to the damping material being measured. These conclusions provide theoretical basis for selecting adhesive, improving adhesion technology, and designing specimen.