文献类型：期刊文献

英文题名：Microstructural Simulations of Polymer Composites by a Viscoelastic Spring Lattice Model

作者：Xu, Zhuoran[1];Hu, Xu[1];Huang, Yongmin[1]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2024

卷号：33

期号：5

外文期刊名：MACROMOLECULAR THEORY AND SIMULATIONS

收录：;EI(收录号：20242316208475);WOS:【SCI-EXPANDED(收录号:WOS:001237504000001)】；

基金：This work was provided by the Fundamental Research Funds for the Central Universities (No. 222201817001) and Key Laboratory of Specially Functional Polymeric Materials and Related Technology of the Ministry of Education (East China University of Science and Technology).

语种：英文

外文关键词：fracture development; HTPB-based solid propellant; mechanical properties; microstructure; viscoelasticly modified lattice spring model

摘要：An improved viscoelastic spring lattice model is used to analyze the mechanical properties of polymer composites containing different microstructures, as exemplified by hydroxyl-terminated polybutadiene-based solid propellants. A drop-on-demand structural model is programmed using the C language to simulate the real solid propellant microstructure. The results show that increasing the particle content has a positive effect on the tensile strength of the propellant, but is detrimental to the ductility. The increase in particle size decreases the maximum tensile strength of the material, reflecting the importance of the dewetting process in the microstructure analysis. Finally, the model accurately predicts that initial defects have a destructive effect on the mechanical properties of the material. A modified spring lattice model is applied to predict the effect of microstructure on the mechanical properties of composites. The results show that the content, shape, and gradation of the filler particles have a significant effect on the mechanical properties. image