Comparative Study on Viscoelastic Evaluation Methods of Polymer Materials Based on Ultrasonic Method.

ABSTRACT: Rubber, as a kind of macromolecular material often used in large ships, aviation, aerospace, and other fields, has remarkable viscoelasticity at room temperature. Therefore, it is of great significance to evaluate the viscoelastic properties of polymer composites. In this paper, four kinds of rubber materials are taken as research objects. Based on the principle of ultrasonic detection, the viscoelastic evaluation of the sample materials is carried out through experiments and simulations. On the basis of previous research, the surface reflection method (SRM) and the bottom reflection method (BRM) are compared in depth. First, the spectrum of received signals is analyzed, and the storage elastic modulus, loss elastic modulus, attenuation coefficient and loss tangent value are obtained. Seco

SUBMITTER: Li YY 

PROVIDER: S-EPMC6766353 | biostudies-literature | 2019 Sep

REPOSITORIES: biostudies-literature