Separation characteristics study of ridge-cut explosive bolts
Separation characteristics study of ridge-cut explosive bolts
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DOI：
10.1016/j.ast.2014.08.016
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发表时间：
2014-12
影响因子：
5.6
通讯作者：
Juho Lee;Jae-Hung Han;Yeungjo Lee;Hyoungjin Lee
中科院分区：
文献类型：
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作者：
Juho Lee;Jae-Hung Han;Yeungjo Lee;Hyoungjin Lee
爆炸螺栓是一种用于许多应用的可靠且有效的烟火释放装置。虽然已经设计和使用了许多爆炸螺栓，但大多数设计过程依赖于基于重复实验的经验。为了更好地理解爆炸锚杆的分离行为，建立了脊切爆炸锚杆的分离行为分析环境。利用AUTODYN软件对切脊式爆炸锚杆进行了有限元分析。通过对作者根据以往经验设计的爆炸螺栓的性能分析，验证了数值分析方法的正确性，并给出了相应的失效准则。利用所提出的方法，脊切爆炸螺栓的分离特性，根据约束条件，特别是螺栓体和夹具之间的差距距离，进行了研究。在分离实验中观察到由于紧密的间隙距离而导致的分离可靠性的劣化。这种分离现象通过分离行为分析来具体阐明。在对分离特性进行数值研究的基础上，提出了一些考虑制造公差的设计改进措施。
Explosive bolts are one type of reliable and efficient pyrotechnic release devices used for many applications. Although numerous explosive bolts have been designed and utilized, most design processes rely on experience based on repetitive experiments. In order to provide a better understanding of the separation behavior of explosive bolts, separation behavior analysis environments for the ridge-cut explosive bolts are established. Ridge-cut explosive bolts, which are separated by ridge-cut mechanism or spallation, are analyzed using AUTODYN. From the behavior analysis of explosive bolts whose design was based on the author's prior experience, the numerical analysis method is verified, including appropriate failure criteria. Utilizing the proposed methodology, the separation characteristics of ridge-cut explosive bolts according to confinement conditions, and especially the gap distance between the bolt body and the fixture, are studied. A degradation in separation reliability due to tight gap distance is observed in separation experiments. This separation phenomenon is specifically clarified by the separation behavior analysis. Based on the numerical study of separation characteristics, some design improvements considering manufacturing tolerance are proposed here.