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首页> 外文期刊>International journal of structural integrity >Mitigation of blast and impact loading via the use of a zeolite-absorbentano-fluidics protection system
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Mitigation of blast and impact loading via the use of a zeolite-absorbentano-fluidics protection system

机译：通过使用沸石吸收剂/纳米流体保护系统减轻爆炸和冲击负荷

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Purpose - In the present work, a new blast-/ballistic-impact mitigation concept is introduced and its efficacy analyzed using advanced computational methods and tools. The concept involves the use of a zeolite protective layer separated by air from the structure being protected and in contact with a water layer in front. The paper aims to discuss these issues. Design/methodology/approach - To properly capture the attendant nano-fluidics phenomena, all the calculations carried out in the present work involved the use of all-atom molecular-level equilibrium and non-equilibrium molecular-dynamics simulations. Findings - Under high-rate loading, water molecules (treated as a nano-fluidic material) are forced to infiltrate zeolite nanopores wherein, due to complex interactions between the hydrophobic nanopore walls and the hydrogen bonds of the water molecules, water undergoes an ordering-type phase transition and acquires high density, while a significant portion of the kinetic energy of the water molecules is converted to potential energy. Concomitantly, a considerable portion of this kinetic energy is dissipated in the form of heat. As a result of these energy conversion/dissipation processes, the (conserved) linear momentum is transferred to the target structure over a longer time period, while the peak loading experienced by the structure is substantially reduced. Originality/value - To the authors' knowledge, the present work constitutes the first reported attempt to utilize pure SiO_2 hydrophobic zeolites in blast-/ballistic-impact protection applications.
机译：目的-在当前工作中，引入了新的爆炸/弹道冲击缓解概念，并使用先进的计算方法和工具分析了其效果。该概念涉及使用沸石保护层，该保护层被空气与被保护的结构隔开并与前面的水层接触。本文旨在讨论这些问题。设计/方法/方法-为了正确捕获伴随的纳米流体现象，本工作中进行的所有计算都涉及使用全原子分子水平的平衡和非平衡分子动力学模拟。发现-在高负荷下，水分子（作为纳米流体材料处理）被迫渗入沸石纳米孔，其中，由于疏水纳米孔壁与水分子氢键之间的复杂相互作用，水经历了有序的-当水分子的动能的很大一部分转换成势能时，它会发生相变并获得高密度。伴随地，该动能的相当大一部分以热的形式消散。这些能量转换/耗散过程的结果是，（守恒的）线性动量在更长的时间段内传递到目标结构，而结构所承受的峰值载荷却大大降低了。原创性/价值-据作者所知，本工作构成首次报道的尝试在爆炸/弹道冲击防护应用中使用纯SiO_2疏水沸石的尝试。

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