Dynamic Compressive Properties of Graphene/Ceramic Particle Reinforced Polyurethane-Based Composites

被引：0
|
作者：
Zou G. [1 ]
Wu S. [1 ]
Xu S. [2 ]
Chang Z. [1 ]
Wang X. [1 ]
机构：
[1] School of Aerospace and Architectural Engineering, Harbin Engineering University, Heilongjiang, Harbin
[2] School of Astronautics, Harbin Institute of Technology, Heilongjiang, Harbin
来源：
Binggong Xuebao/Acta Armamentarii | 2023年 / 44卷 / 03期
关键词：
composite; dynamic performance; numerical simulation; particle reinforcement; polyurethane;
D O I：
10.12382/bgxb.2021.0777
中图分类号：
学科分类号：
摘要：
The good mechanical properties of polyurethane make it widely used in various fields. By introducing graphene reinforcement into the polyurethane matrix, it can greatly enhance the properties of the polyurethane-based composites. To obtain the polyurethane-based composites with high impact resistance, graphene oxide reinforced polyurethane was prepared by in-situ polymerization, and dynamic compression tests at different strain rates were carried out with the Hopkinson bar device. On this basis, 3.3 mm diameter Al2O3 granular ceramics was added as a new reinforcing phase by the pressureless infiltration method. The dynamic confining pressure experiment of graphene / granular ceramic reinforced polyurethane-based composites is performed, and the stress-strain curve of the sample is obtained. The finite element simulation model of the composite is established by using LS-DYNA. Combined with the experimental data, the reliability of the simulation is verified, the deformation process and damage mechanism of the composite under dynamic confining pressure are analyzed, the simulation analysis of the samples with different particle sizes under dynamic confining pressure is carried out, and the influence of ceramic particles with different particle sizes on the dynamic compression mechanical properties of the composite is discussed. The results show that: the particle size of ceramic particles is closely related to the compressive strength of the composites; with the decrease of ceramic particle size, i.e., the number of ceramic particles increases and the particle gap decreases, the compressive properties of the composite are improved. © 2023 China Ordnance Society. All rights reserved.
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页数：7
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