高质量分数压缩粉/聚四乙烯基复合材料的机械性能和构成模型
Weihang Li1, Wenjin Yao1, Wei Zhu1
1School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
Polymers
|February 13, 2025
概括
粉/聚四乙烯 (PTFE) 复合材料在弹头应用中表现有前途. 它们的机械性能,包括压力强度,在不同的含量,颗粒大小和应变速率下进行了研究,重点是构成模型.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 爆炸物工程 爆炸物工程
背景情况:
- 弹头中的重金属粉末增强了杀伤力,减少了附带损害.
- 聚合物防止金属粉末中的烧结,改善可控制弹头的分散.
研究的目的:
- 研究粉/聚四乙烯 (PTFE) 复合材料的动态和静态机械性能.
- 在冲击负荷下开发这些复合材料的构成模型.
主要方法:
- 准静态和分裂的霍普金森压力杆 (SHPB) 动态压缩试验.
- 测试的复合材料含有0-90重量%的和不同的颗粒大小 (200-600微米).
- 获得的应力-应变曲线跨越广泛的应变速率范围 (0.0013610 s-1).
主要成果:
- 压力强度随着含量和拉伸率的增加而增加.
- 随着颗粒大小的增加,强度下降.
- 由于粒子相互作用,高含量 (90 wt%) 的复合材料的强度超过了纯 PTFE.
- 在强度和临界应变中观察到显著的应变率灵敏度.
结论:
- /PTFE复合材料在弹头应用中表现出可调节的机械行为.
- 一个损伤修改的朱旺唐 (ZWT) 粘弹性模型准确地描述了它们的构成性行为.
- 粒子相互作用和拉伸率显著影响复合材料的性能.
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