著者

臼井 俊央 齊藤 文一 田村 英樹 橋口 拓泰

出版者

一般社団法人 日本高圧力技術協会

雑誌

圧力技術 (ISSN:03870154)

巻号頁・発行日

vol.42, no.2, pp.60-68, 2004 (Released:2004-08-31)

参考文献数

8

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Ballistic impact tests were conducted on intermediate purity titanium plate and Ti-6pctAl-4pctV-ELI alloy plate and newly developed Ti-Fe-O-N alloy plate using ogive-shaped projectile with 7. 62mm diameter to study relation between the fracture mechanisms and adiabatic shear band formation The plugging process was dominated by adiabatic shear deformation in localized bands. Selected data and optical micrographs relating to the adiabatic shear band formation, the variation of depth of penetration and ballistic limit velocity were presented. The fracture mechanisms associated with the shear localization and fracture process changed from bulging failure to plugging failure by a shocked pressure increase. The results showed the differences of the fracture mechanisms between two high strength titanium alloys are responsible for significant differences in the elongation of their mechanical property and in the evolution of shear band patterns It also showed evidence of the long shear band connected from the shocked surface to the bulging region was found in all target plates, but evidence of the long cracks connected did not be found in all target plates at impact velocity just near below each ballistic limits

著者

赤星 保浩 花田 俊也 田村 英樹 町田 裕 福重 進也 高良 隆男

出版者

一般社団法人 日本機械学会

雑誌

年次大会講演論文集

巻号頁・発行日

vol.2006, pp.345-346, 2006

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In order to simulate the debris impacts in geosynchronous orbit, we need the launcher that can launch the projectile under approximately 1[km/sec]. We converted a two-stage light gas gun into a powder gun. In generally, though sabot separation technique is used to launch the projectile of sphere, we can not apply its technique to a our powder gun. So we also conducted the development of new separation technique of projectile of sphere. In particular, we will show with the focus on the new separation technique.