扭曲角度和弹射半径对双层酸膜弹道冲击性能的影响
Ning Liu1,2, Ke Huang1, Xuejian Yang1
1School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai 200092, China.
Nanomaterials (Basel, Switzerland)
|September 26, 2025
概括
两层间的扭曲角度显著影响二层二烯膜.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 计算物理 计算物理
背景情况:
- 双层酸膜对于纳米保护材料来说是有前途的.
- 了解它们在撞击下的弹道性能至关重要,但人们对此了解甚少.
- 结构参数之间的相互作用,如扭转角度和冲击器尺寸是关键.
研究的目的:
- 研究两层二烯膜的弹道性能上的层间扭曲角度和弹子尺寸之间的合机制.
- 阐明这些因素如何影响冲击反应和故障机制.
- 为基于的纳米盔甲提供设计见解.
主要方法:
- 使用粗粒度的分子动力学模拟.
- 系统地探索扭转角度 (0-90°) 和射弹半径 (2-10 nm).
- 对半径为48纳米的膜的冲击反应分析.
主要成果:
- 扭转角度对弹道性能的影响仅对大约超过8纳米的弹片大小具有重要意义.
- 在这个值以下,变形是局部的,独立于扭曲.
- 90°的扭转角度导致严重的波反射,力放大 (高达82%),以及较大的弹子弹道极限速度下降28%.
结论:
- 扭曲-边界-波相互作用关键地控制了双层二烯的抗冲击能力.
- 这些发现为调整色素纳米盔甲以适应特定冲击条件提供了实际指导.
- 设计策略必须考虑扭转角度和弹子尺寸的综合影响.
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