Study on dynamic viscoelastic constitutive model of nonwater reacted polyurethane grouting materials based on DMA

Reviews on Advanced Materials Science

Chuhao Huang¹  Jingwei Zhang¹  Shuo Chen¹  Jia Li² 

[1] School of Civil Engineering, Zhengzhou University, Zhengzhou 450002, China;School of Hydraulic Science and Engineering, Zhengzhou University, Zhengzhou 450002, China;

关键词: non-water reacted polymer material;    dynamic thermomechanical analysis;    dynamic viscoelastic constitutive model;    generalized maxwell model;   

DOI  :  10.1515/rams-2022-0004

来源: DOAJ

【 摘 要 】

Nonwater reacted polyurethane grouting materials are new materials developed to make up for the shortcomings of water-reactive materials in emergency rescue. However, its viscoelastic properties and constitutive model under dynamic loads have not been systematically studied. Based on dynamic thermal mechanical analysis (DMA), the dynamic viscoelastic indexes such as storage modulus, loss modulus, and loss factor of nonwater reacted polymer grouting material were obtained, and the frequency spectrum of polymer with different densities were analyzed. In addition, comparing and analyzing the classical viscoelastic constitutive models such as Maxewell model, Kelvin model, and Fractional model, the fourth-order generalized Maxwell model (GMM) was selected to construct the viscoelastic constitutive model of polyurethane grounding materials. Then, the parameters of the viscoelastic constitutive model of polyurethane grounding materials were obtained by using multi-objective shared parameter fitting method, and dynamic viscoelastic constitutive model of nonwater reacted polyurethane grouting materials was established. Furthermore, the viscoelastic constitutive model with different densities was verified by the DMA test. The results show that the dynamic viscoelastic constitutive model of nonwater reacted polyurethane grouting materials in the article can accurately and efficiently describe the dynamic viscoelastic properties of polyurethane grounding materials, which lays a foundation for the dynamic response analysis of polymer structures.

【 授权许可】

Unknown