Abstract
Firstly, recently, there are a lot of techniques being demanded for complex process, various explosive initiation method and highly accurate control of detonation are needed. In this research, the metal foil explosion using high current is focused attention on the method to obtain linear or planate initiation easily, and the main evaluation of metal foil explosion to initiate explosive was conducted. The explosion power was evaluated by observing optically the underwater shock wave generated from the metal foil explosion. Secondly, in high energy explosive processing, there are several applications, such as shock compaction, explosive welding, food processing and explosive forming. In these explosive applications, a high sensitive explosive has been mainly used. The high sensitive explosive is so dangerous, since it can lead to explosion suddenly. So, for developing explosives, the safety is the most important thing as well as low manufacturing cost and explosive characteristics. In this work, we have focused on the initiation sensitivity of a solid explosive and performed numerical analysis of sympathetic detonation. The numerical analysis is calculated by LS-DYNA 3D (commercial code). To understand the initiation reaction of an explosive, Lee-Tarver equation was used and impact detonation process was analyzed by ALE code. Configuration of simulation model is a quarter of circular cylinder. The donor type of explosive (SEP) was used as initiation explosive. When the donor explosive is exploded, a shock wave is generated and it propagates into PMMA, air and metallic layers in order. During passing through the layers, the shock wave is attenuated and finally, it has influence on the acceptor explosive, Comp. B. Here, we evaluate the initiation of acceptor explosive and discuss about detonation pressure, reactive rate of acceptor explosive and attenuation of impact pressure.
Highlights
Explosive is a material which generates high energy in a moment
We have focused on the initiation sensitivity of a solid explosive and performed numerical analysis of sympathetic detonation
When the donor explosive is exploded, a shock wave is generated and it propagates into PMMA, air and metallic layers in order
Summary
Explosive is a material which generates high energy in a moment. And it is applied to many field of the society, such as material development, civil engineering, medical treatment and so on. We focused on metal foil explosion using high current as an available method of planer initiation system. Initiation explosive used by metal foil explosion is applied in widespread use, such as a source of shock wave and light in optical observation. Explosion power is estimated for optical observation on under water shock wave of metal foil explosion. 2. METHOD OF EXPERIMENT 2.1 SELECTING METAL FOIL My laboratory is investigating the method of generating shock wave using electric power from the past. From this and past results, the good electric conductivity metal understood that the shock wave is strong. Optical observation of the underwater shock wave was performed by the shadowgraph method using high-speed video camera HPV-1 made by Shimazu corporation.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
