Simultaneous Initiation of Nitromethane in Two Holes by Pulsed Wire Discharge for Crack Control of a Concrete Block
Simultaneous Initiation of Nitromethane in Two Holes by Pulsed Wire Discharge for Crack Control of a Concrete Block
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DOI：
10.1007/s40870-019-00227-6
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发表时间：
2019-11
影响因子：
1.7
通讯作者：
Shigeru Tanaka;M. Nishi;M. Yamaguchi;I. Bataev;K. Hokamoto
中科院分区：
文献类型：
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作者：
Shigeru Tanaka;M. Nishi;M. Yamaguchi;I. Bataev;K. Hokamoto
为了从倒塌的混凝土结构中救出受害者，应迅速制定救援路线。鉴于有受害者在场，应避免将混凝土打碎。本研究的目的是使用尽可能少的含能材料将混凝土分成任意形状。在这项研究中，硝基甲烷（NM），这经历了爆燃反应，被用作能源物质。两个NM电荷放置在混凝土试样同时点燃脉冲线放电，以最大限度地提高功率的爆燃。结果，在试样的装料孔之间形成断裂表面，并且获得近似对称的断裂形状。在以层裂破坏为破坏条件的数值分析中，得到了与模型试验结果非常相似的断裂形态。此外，裂纹的形成由应力波传播从两个装药孔的干涉被证明。
In order to rescue the victims from collapsed concrete structures, rescue routes should be made quickly. Given the presence of the victims, breaking concrete into pieces should be avoided. The purpose of this study is to divide concrete into arbitrary shapes using as little energetic material as possible. In this study nitromethane (NM), which undergoes a deflagration reaction, was used as an energy substance. Two NM charges placed into a concrete specimen were simultaneously ignited by pulsed wire discharge to maximize the power of the deflagration. As a result, a fracture surface was formed between the charge holes of the specimen, and an approximately symmetrical fractured shape was obtained. In numerical analysis with spalling failure as the failure condition, a fracture shape very similar to the model experimental result was obtained. Furthermore, the formation of a crack by the interference of stress waves propagating from two charge holes was demonstrated.