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玻璃纤维增强气凝胶防护性能的研究

Keywords: 气凝胶,防护性能,入射波整形,靶试实验

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Abstract:

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12mm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700MPa降低为311MPa,应力持续时间由80μs延长为210μs.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

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