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Proceedings Paper

Optical measurements of flyer plate acceleration by emulsion explosive
Author(s): Shiro Kubota; Hideki Shimada; Kikuo Matsui; Yuji Ogata; Masahiro Seto; Akira Masui; Yuji Wada; Zhi-Yue Liu; Shigeru Itoh
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Paper Abstract

This paper presents the study on the application of explosive welding technique to the field of the urgent repair of the gas and water pipe networks. The essential parameters related to the explosive welding are scrutinized from the point of view of the minimizing the damage to the steel pipe after welded explosively with a flyer plate. The emulsion explosive is contained in a rectangular hard-paper box whose bottom is the flyer plate with 100 mm length, 25 mm width and 1.5 mm thickness. The flyer motions of the flyer plates accelerated by emulsion explosive are observed by high-speed photography from the side and front view of the flyer plate. The damage to the pipe by the flyer plate is discussed with the results of the observation of flyer motion and explosive welding test under various experimental conditions. Moreover, one way to control the motion of the flyer plate is proposed. We put a PMMA buffer block into the explosive. The flying process of flyer plate is calculated by the finite different scheme based on the ALE method. The effectiveness of this method is demonstrated by the experimental and numerical studies.

Paper Details

Date Published: 17 April 2001
PDF: 8 pages
Proc. SPIE 4183, 24th International Congress on High-Speed Photography and Photonics, (17 April 2001); doi: 10.1117/12.424354
Show Author Affiliations
Shiro Kubota, Kyushu Univ. (Japan)
Hideki Shimada, Kyushu Univ. (Japan)
Kikuo Matsui, Kyushu Univ. (Japan)
Yuji Ogata, National Institute for Resources and Environment (Japan)
Masahiro Seto, National Institute for Resources and Environment (Japan)
Akira Masui, Kitanihon Soil Research Lab. Co., Ltd. (Japan)
Yuji Wada, Univ. of Tokyo (Japan)
Zhi-Yue Liu, Kumamoto Univ. (Japan)
Shigeru Itoh, Kumamoto Univ. (Japan)

Published in SPIE Proceedings Vol. 4183:
24th International Congress on High-Speed Photography and Photonics
Kazuyoshi Takayama; Tsutomo Saito; Harald Kleine; Eugene V. Timofeev, Editor(s)

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