Obunai Kiyotaka

オブナイキヨタカ | Obunai Kiyotaka

Affiliation and department：

Research field (1)： Machine materials and mechanics

Research theme for competitive and other funds (8)：

2024 - 2027 Study on mechanical characteristics of nano- micro-fiber under various strain speed conditions
2021 - 2024 Investigation and improvement of interfacial strength between fiber and matrix under impact loading
2019 - 2023 Formulation of design criteria and improvement of durability of carbon fiber reinforced composite joint subjected to in-plane and out of plane loading.
2018 - 2021 Improvement in mechanical properties and fatigue life of CFRTP due to an addition of sub-micron glass fibers and their mechanisms
2015 - 2016 木質・草木バイオマス資源を主とする熱硬化性成形原料の創生

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Papers (80)：

K. Obunai, K. Okubo. Mechanical characteristics of reclaimed carbon fibre under superheated steam atmosphere and its feasibility for remanufacturing CFRP/CFRTP. Composites Part A: Applied Science and Manufacturing. 2024. 176. 107843-107843
Taku Kamiya, Kiyotaka Obunai PhD, Kazuya Okubo. Change of Relative Local Velocity in Pulley Groove at Sliding between Belt and Pulleys for Metal Pushing V-Belt Type CVT. SAE Technical Paper Series. 2023
OBUNAI Kiyotaka, OKUBO Kazuya, FUKUO Ato. A prediction model of flat belt slippage considering rigid-slip during power transmission. Transactions of the JSME (in Japanese). 2023. 89. 924. 23-00073-23-00073
村山凌太郎, 小武内清貴, 大窪和也. 炭素繊維/樹脂間の界面接着せん断強度に及ぼす繊維表面のサイジング処理効果の負荷ひずみ速度の違いによる変化-Change in Effects of Sizing Treatment on Interfacial Shear Strength between Carbon Fiber and Resin According to Difference of Loading Strain Rate. 日本接着学会誌 = Journal of the Adhesion Society of Japan : adhesion. 2023. 59. 3. 65-72
Ryotaro Murayama, Kiyotaka Obunai, Kazuya Okubo. Effect of sub-micron glass fiber addition on CAI strength of UD-CFRP. International Journal of Computational Methods and Experimental Measurements. 2022. 10. 3. 271-281

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MISC (60)：

TANAKA Kenichiro, OBUNAI Kiyotaka, OKUBO Kazuya, DOI Ikuhito, KATO Hideyuki. Change of Transmitting Properties of Rubber V-belt for CVT according to Difference of Stiffness. The Proceedings of Conference of Kansai Branch. 2020. 2020. 06_613
OKUBO Kazuya, OBUNAI Kiyotaka. An Method to Improve Fatigue Life of Fiber Reinforced Composite:- Introduction of Applications with Additions of Fine Fibers into Matrix -. The Proceedings of Conference of Kansai Branch. 2020. 2020. 03_kicyo
Stress relaxation of CFRP plate fastened by bolt in thickness direction:-Influence fastening torque, temperature condition and types of reinforcement-. The Proceedings of Conference of Kansai Branch. 2020. 2020. P_009
UEDA Taiki, OKUBO Kazuya, OBUNAI Kiyotaka, Li BAO. Improvement of impact property of curved thin shell fabricated with chopped tape CFRP:- Influence of diameter of added submicron glass fiber into matrix -. The Proceedings of Conference of Kansai Branch. 2020. 2020. P_010
OKIMURA Takuma, OKUBO Kazuya, OBUNAI Kiyotaka. Influence of impact energy on improvement rate of energy absorption of chopped carbon fiber reinforced FRP during drop impact test due to addition submicron glass fiber into matrix. The Proceedings of Conference of Kansai Branch. 2020. 2020. P_012

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Patents (9)：

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Work history (4)：

2024/04 - Doshisha University Faculty of Science and Engineering Department of Mechanical and Systems Engineering Professor
2018/04 - 2024/03 Doshisha University Faculty of Science and Engineering Department of Mechanical and Systems Engineering
2011/04 - 2018/03 Okayama Prefectural University Faculty of Computer Science and System Engineering Assistant Professor
2010/04 - 2011/03 Japan Society for the Promotion of Science Research Fellowship for Young Scientists

Awards (4)：

2022/05 - Society of Materials Science, Japan JSMS Award for Promising Researchers
2022/04 - Society of Materials Science, Japan JSMS Kansai Branch President Award
2017/07 - The Japan Institute of Light Metals Chugoku-Shikoku Chapter Research and Development Award
2015/05 - JSMS Committee on Composite Materials Encouragement award

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