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Saito, Toru; Okubo, Toshikazu*; Izumi, Keisuke*; Okawa, Yoshinao*; Kobayashi, Norihiro*; Yamazaki, Toru; Kawano, Katsumi; Isono, Takaaki
Teion Kogaku, 50(8), p.400 - 408, 2015/08
Aramid fiber-reinforced plastic (AFRP) has been developed as a structural material that has the advantages of light weight and high strength. In this study, tensile tests were carried out to measure the tensile properties of AFRP rod on the market for reinforcement of concrete at room temperature, 77 K and 4.2 K. Especially at cryogenic temperatures, it is difficult to perform a tensile test of the bar because the specimen slips through the jig grip. To prevent the rod from slipping, tensile tests were carried out with some filling conditions. The applicable and appropriate tensile test conditions were established by modifying the jig grip, treating the surface of the rod and using cryogenic epoxy infill to grip the rod. They were more than 1100 MPa. Additionally, the AFRP rod included a temperature dependence in which the Young's modulus increased as the test temperature decreased. It was confirmed that the Young's modulus increased because aramid fiber was more dominant than epoxy.
Okada, Kenichi*; Tsuneoka, Masaki; Murano, Yoshihiro*; Okawa, Yoshinao
Denki Setsubi Gakkai-Shi, 22(2), p.151 - 158, 2002/02
no abstracts in English
Okawa, Yoshinao; Kashimura, Shinji*; Murano, Yoshihiro*; Ito, Michio*; Okada, Kenichi*; Izumi, Keisuke*; Tsuchida, Takashi*
Dai-19-Kai Denki Setsubi Gakkai Zenkoku Taikai Koen Rombunshu, p.415 - 416, 2001/00
no abstracts in English
Okawa, Yoshinao; Murano, Yoshihiro*; Okada, Kenichi*; Kawakami, Kunio*; Izumi, Keisuke*; ; Sasaki, Takashi*;
Heisei 12-Nendo Denki Setsubi Gakkai Zenkoku Taikai Koen Rombunshu, p.315 - 316, 2000/00
no abstracts in English
Tsunematsu, Toshihide; Namba, Haruyuki*; Akutsu, Yoichi; Okawa, Yoshinao; Yagenji, Akira; Takeda, Masatoshi*; Yajima, Kensaku*; Nitta, Yoshio*; Kobayashi, Kenichi*; Maeda, Ikuo*; et al.
Fusion Engineering and Design, 41(1-4), p.415 - 420, 1998/09
Times Cited Count:3 Percentile:31.82(Nuclear Science & Technology)no abstracts in English
Hashimoto, Masayoshi*; Tsunematsu, Toshihide; Okawa, Yoshinao; ; ; Yamada, Hiroyuki; ; ; ; Murano, Y.*; et al.
Fusion Engineering and Design, 41, p.407 - 414, 1998/00
Times Cited Count:2 Percentile:24.47(Nuclear Science & Technology)no abstracts in English
; ; ; ; ; Okawa, Yoshinao; Maruyama, So; ; V.Tanchuk*; R.Haange*; et al.
Fusion Technology 1998, 2, 4 Pages, 1998/00
no abstracts in English
Okawa, Yoshinao; Yagenji, Akira; Wakui, Toshiaki*; Murano, Yoshihiro*; Kawakami, Kunio*; Yamakura, Hideki*
Heisei 10-Nendo (Dai-16-Kai) Denki Setsubi Gakkai Zenkoku Taikai Koen Rombunshu, p.175 - 176, 1998/00
no abstracts in English
; Nakahira, Masataka; Okawa, Yoshinao; Tada, Eisuke; Seki, Masahiro
JAERI-Tech 96-023, 30 Pages, 1996/06
no abstracts in English
Obara, Kenjiro; Kakudate, Satoshi; Oka, Kiyoshi; Furuya, Kazuyuki; ; Tada, Eisuke; Shibanuma, Kiyoshi; Koizumi, Koichi; Okawa, Yoshinao; Morita, Yosuke; et al.
JAERI-Tech 96-011, 111 Pages, 1996/03
no abstracts in English
; Okawa, Yoshinao; Nishi, Masataka; ; ; Okada, K.*; ;
Dai-14-Kai Denki Setsubi Gakkai Kenkyu Happyokai Koen Rombunshu, 0, p.291 - 292, 1996/00
no abstracts in English
; Okawa, Yoshinao; Nishi, Masataka; ; ; ; ; Okada, K.*
Dai-14-Kai Denki Setsubi Gakkai Kenkyu Happyokai Koen Rombunshu, 0, p.293 - 294, 1996/00
no abstracts in English
Miya, Kenzo*; ; Takatsu, Hideyuki; Hada, Kazuhiko; Koizumi, Koichi; Jitsukawa, Shiro; ; Okawa, Yoshinao; Shimakawa, T.*; Aoto, Kazumi*; et al.
Fusion Engineering and Design, 31, p.145 - 165, 1996/00
Times Cited Count:3 Percentile:32.65(Nuclear Science & Technology)no abstracts in English
; ; Okawa, Yoshinao
Nihon Kenchiku Gakkai Taikai Gakujutsu Koen Kogaishu, 0, p.1051 - 1052, 1996/00
no abstracts in English
Akutsu, Yoichi; Okawa, Yoshinao; Suzuki, Hideyuki; ; ; ;
Nihon Kenchiku Gakkai Taikai Gakujutsu Koen Kogaishu, 0, p.1147 - 1148, 1996/00
no abstracts in English
Okawa, Yoshinao
Hoshasen To Sangyo, 0(66), p.20 - 24, 1995/00
no abstracts in English
Okawa, Yoshinao; Akutsu, Yoichi; Suzuki, Hideyuki; ; ; ;
Nihon Kenchiku Gakkai Taikai Gakujutsu Koen Kogaishu, 0, p.1047 - 1048, 1995/00
no abstracts in English
Akutsu, Yoichi; Okawa, Yoshinao; Suzuki, Hideyuki; ; ;
Nihon Kenchiku Gakkai Taikai Gakujutsu Koen Kogaishu, 0, p.1337 - 1338, 1995/00
no abstracts in English
Takeda, M.*; Okawa, Yoshinao; ; Akutsu, Yoichi;
Seismic,Shock,and Vibration Isolation 1995 (PVP-Vol. 319), 0, p.317 - 322, 1995/00
no abstracts in English
; Akutsu, Yoichi; Okawa, Yoshinao; Suzuki, Hideyuki; ; ;
Nihon Kenchiku Gakkai Taikai Gakujutsu Koen Kogaishu, 0, p.907 - 908, 1994/09
no abstracts in English