Nagahisa Ogasawara
National Defense Academy of Japan
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Publication
Featured researches published by Nagahisa Ogasawara.
Archive | 2015
Yu Oishi; Shuichi Arikawa; Satoru Yoneyama; Hiroyuki Yamada; Nagahisa Ogasawara
In this study, the impact deformation behavior at the interface of a bi-material having different elastic wave velocities difference of each material is investigated. A split Hopkinson pressure bar method is used for the impact test. The deformation behavior of each material are observed using high-speed digital camera at the speed of one million frames per second and the strains distributions at the interface are measured using digital image correlation. The results are compared with the strains in a specimen without interface. The results show that the strain distribution in one material near the interface is affected by the strain in another material. The complicated deformation behavior is observed at the bi-material interface as the results of the interaction of elastic weaves in both materials.
EPJ Web of Conferences | 2015
Kohei Tateyama; Hiroyuki Yamada; Nagahisa Ogasawara; Ryo Okui; Kinya Ogawa
EPJ Web of Conferences | 2015
Hiroyuki Yamada; Midori Hotta; Tsuyoshi Kami; Nagahisa Ogasawara; Xi Chen
EPJ Web of Conferences | 2018
Tsuyoshi Kami; Hiroyuki Yamada; Nagahisa Ogasawara
EPJ Web of Conferences | 2018
Kohei Tateyama; Hiroyuki Yamada; Nagahisa Ogasawara
Advanced experimental mechanics | 2018
Nagahisa Ogasawara; Chie Kobayashi; Hiroyuki Yamada
Transactions of the JSME (in Japanese) | 2017
Tsuyoshi Kami; Hiroyuki Yamada; Nagahisa Ogasawara
The Proceedings of the Materials and Mechanics Conference | 2017
Kohei Tateyama; Hiroyuki Yamada; Nagahisa Ogasawara
The Proceedings of Yamanashi District Conference | 2017
Tsuyoshi Kami; Teira Yoshida; Hiroyuki Yamada; Nagahisa Ogasawara
The Proceedings of Yamanashi District Conference | 2017
Nagahisa Ogasawara; Shoko Horinaga; Hiroyuki Yamada
