玻璃纤维增强气凝胶防护性能的研究
Protective Performance of Glass Fiber Reinforced Aerogels
杨杰 1李树奎 1王富耻 1闫丽丽 1霍咚梅1
作者信息
- 1. 北京理工大学材料学院,北京,100081
- 折叠
摘要
在改进的霍普金森压杆上对玻璃纤维增强气凝胶的防护性能进行了初步研究,使用高速摄影技术研究了气凝胶的防护机理,并通过靶试实验验证了气凝胶/钢复合靶板对实弹的防护效果. 结果表明, 使用12mm厚的气凝胶对入射波进行整形后,输入杆上应力时间曲线的形状由矩形逐渐变为准三角形. 输入杆上的最大应力由700MPa降低为311MPa,应力持续时间由80μs延长为210μs. 气凝胶在子弹冲击作用下发生爆炸,改变了应力状态并消耗大量能量. 纤维可以延缓气凝胶的爆炸过程,有利于能量的散失. 气凝胶/钢复合靶板能够有效地防护弹丸的冲击,气凝胶对内层的钢板起到了很好的保护作用.
Abstract
The protective performance of glass fiber reinforced aerogel was studied preliminarily on an improved spilt Hopkinson pressure bar. High speed photography was used to study the protective mechanism of aerogel. Anti-bullet property of aerogel/steel target was investigated by target experiments. Results showed that after incident pulse shaping using aerogel with a thickness of 12 mm, the shape of the stress-time curve on the incident bar changed from rectangle to triangle, the highest stress on the incident bar decreased from 700 MPa to 311 MPa, the duration time of the pulse increased from 80 μs to 210μs. Aerogel burst and consumed a lot of energy when it was impacted by bullet, the stress state of aerogel was also changed. Fiber could postpone the burst process of aerogel and was beneficial to consuming energy. Aerogel/steel target had excellent anti-bullet property. Aerogel could protect the steel target effectively.
关键词
气凝胶/防护性能/入射波整形/靶试实验Key words
aerogel/protective performance/incident pulse shaping/target experiment引用本文复制引用
出版年
2010
NETL
NSTL
维普
万方数据