著者

波多 英寛 日南川 英明 平山 寛 花田 俊也 藤原 和人 廣江 哲幸

出版者

一般社団法人日本機械学会

雑誌

スペース・エンジニアリング・コンファレンス講演論文集 : Space Engineering Conference (ISSN:09189238)

巻号頁・発行日

vol.2009, no.18, pp.107-110, 2010-01-28

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This study was bursting test of lithium-ion battery using small satellite by overcharge. As a result, the lithium-ion battery exploded by overcharge and confirmed that a flame occurred. The temperature at the time of the bursting was measured, and it was around 150 degrees Celsius. As for the collection fragments, it was measured dimensions, and the distribution of the collection fragments was provided.

著者

藤木 克洋 波多 英寛 藤原 和人 川島 扶美子 坂本 武司 稲尾 大介

出版者

一般社団法人 日本機械学会

雑誌

スペース・エンジニアリング・コンファレンス講演論文集

巻号頁・発行日

vol.2013, pp._A1-1_-_A1-4_, 2013

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Now, in order to elucidate phenomena of high velocity, high velocity launching equipment, such as single stage gas gun, powder gun, and two stage gas guns are used. Generally, powder gun and two stage gas guns can launch a projectile high mass compared with a single stage gas gun. But, the working hours for cleaning the inside of a launch tube are required after launching a projectile, and since gunpowder is used, the deterioration of equipment is large compared with a single stage gas gun. On the other hand, a single stage gas gun can prepare launching projectile in comparatively short time. Moreover, there is an advantage that equipment degradation is small. In this study, the single stage gas gun which can be launched to a portable type and all the directions is developed. And the experimental result which launched various projectiles using the single stage gas gun is reported.

著者

廣江 哲幸 松尾 日出男 藤原 和人 宮田 政信 松本 繁明 安部 尊之

出版者

一般社団法人日本機械学会

雑誌

日本機械学會論文集. A編 (ISSN:03875008)

巻号頁・発行日

vol.62, no.601, pp.2026-2031, 1996-09-25

被引用文献数

3

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Spall tests for three kinds of materials (A12024, SS41, Cu) are conducted using a newly developed testing device. This experimental assembly generates triangular stress waves with various gradients-in plate specimens (50×50×20mm) by direct explosive loadings. The relationship between measured spall layer thicknesses (5-15mm)and the explosive (PETN) thicknesses indicate that a time dependence exists in spall phenomena of the metals. A computer program with a cumulative damage model was constructed, which has reproduced the basic characteristics of the observed failure in the metals. It is known that the stress wave reflected at the free surface can be prevented from reaching the specimen plate by spallation of the momentum trap or spall plate, which is mounted in contact with the specimen. The following spall test results for A12024 have verified this effect and the numerical analysis also has simulated the phenomena successfully.