Rchr
J-GLOBAL ID：200901055950291122
Update date: Oct. 19, 2024
Koyama Atsuhiro
コヤマ アツヒロ | Koyama Atsuhiro
Affiliation and department：
Job title：
Associate Professor
Research field (1)：
Machine materials and mechanics
Research keywords (4)：
材料強度学
, 疲労
, Strength and Fracture of Materials
, Fatigue
Research theme for competitive and other funds (15)：
- 2022 - 2025 CN実現のための軽量マルチマテリアル輸送車体用高耐損傷性革新的異材接合技術の開発
- 2019 - 2022 Development of innovative dissimilar material joining technology with high strength and high damage resistance to realize a lightweight multi-material structure
- 2016 - 2018 Energy Transfer of electron-induced thermal acoustic wave and its imaging
- 2011 - 2013 Development of Scanning Laser-induced Acoustic Non-destructive Inspection (SLANDI)
- 2003 - 2007 金属ガラスの変形機構を考慮したマルチスケールモデリングの研究
- 2005 - 摩擦攪拌接合アルミニウム合金の疲労き裂発生および疲労き裂進展挙動の解明
- 2003 - 2004 繰返し押込み荷重負荷試験によるDLC薄膜の疲労強度の解明
- 2003 - 2004 Research on Internal Structural Evolution driven by Collective Defects Field Dynamics for Multiscale Modeling
- 2001 - 2002 電子線誘起超音波顕微システムを用いた疲労試験機の開発と疲労き裂進展機構の解明
- 2001 - 2002 Collective Mechanical Behavior of dislocation Network Developed under Indentation
- 2000 - 2001 Meso-scale Nondestructive Observation System of Self-organized Dislocation Network using Scanning Electron Acoustic Microscopy
- 2000 - インデンテーション試験による強度評価法の検討
- 2000 - SEAMを用いた非破壊内部観察手法の開発
- 1994 - セラミックスの疲労き裂進展挙動に関する研究
- 1994 - Study on Fatigue Crack Growth Behavior in Ceramics
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Papers (40)：
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Atsuhiro Koyama, Yohei Sonobe, Akihide Saimoto, Yoshihiko Uematsu. Effect of Heat Treatment on Fatigue Life of Ti-6Al-4V Alloy With Two-Layered Structure of Additively Manufactured and Conventional Wrought Parts. Fatigue & Fracture of Engineering Materials & Structures. 2024
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Tianhong Xie, Tatsuki Otsubo, Atsuhiro Koyama, Tomonori Kato, Riku Yamashita, Vanisara Kaewnamchai, Takanori Yazawa. Breakage Detection Based on the Breakage Mechanism of Small-Diameter Drills. Advances in Science and Technology. 2024. 139. 51-57
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Tomohiro Tanaka, Tomonori Kato, Tatsuki Otsubo, Atsuhiro Koyama, Takanori Yazawa. Control of Spindle Position and Stiffness of Aerostatic-Bearing-Type Air Turbine Spindle. International Journal of Automation Technology. 2022. 16. 4. 456-463
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Takuichiro Ino, Yohei Sonobe, Atsuhiro Koyama, Akihide Saimoto, Md. Abdul Hasib. 2D Stress Analysis of an Infinite Plate with Orthotropic Inclusions by Embedding Continuous Force Doublet. Journal of Multiscale Modelling. 2022. 13. 2
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Atsuhiro KOYAMA, Toru TAKASE, Yohei SONOBE, Masayuki AKITA, Toshifumi KAKIUCHI, Yukio AGATA, Masaki NAKAJIMA, Akihide SAIMOTO, Yoshihiko UEMATSU. Effect of aging treatment on fatigue behavior of Nb-added ferritic stainless steel type 429 welds in 3% NaCl solution. QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY. 2021. 39. 3. 158-162
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MISC (36)：
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KOGA Hiroki, RYU Satoshi, KOYAMA Atsuhiro, MOTOMURA Fumitaka, TAKASE Toru. D-21 Observation of surface micro-defects using Scanning Laser-induced Acoustic Microscope. 2016. 2016. 69. 167-168
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SAKI Hyuma, SHIBAHARA Hiromu, YOSHITAKE Taisyu, KOYAMA Atsuhiro, TAKASE Toru. D-15 Effect of thickness on fatigue crack growth behavior of friction stir welded A6063 thin plate under constant amplitude. 2016. 2016. 69. 155-156
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YAMASHITA Yuichi, KURATA Hideyuki, RIKIHISA Shinnosuke, KOYAMA Atsuhiro, TAKASE Toru. D-14 Effect of Two-step Loading on Fatigue Crack Growth Behavior of Friction Stir Welded A6063. 2016. 2016. 69. 153-154
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URAKAWA Kazuma, TANIGAWA Keisuke, TANAKA Akira, KOYAMA Atsuhiro, TAKASE Toru. D-13 Fatigue Crack Initiation Life of Friction Stir Welded A6063 under Pulsating 4 Point Bending. 2016. 2016. 69. 151-152
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Koyama Atsuhiro, Takase Toni, Motomura Fumitaka, Koga Hiroki, Ryu Satoshi, Shibutani Yoji. OS6-9 Non-destructive Observations of Small Crack using Scanning Laser-induced Acoustic Microscope(Ultrasonic NDT of Cracks and Damages (1),OS6 Ultrasonic non-destructive testing and evaluation,MEASUREMENT METHODS). Abstracts of ATEM : International Conference on Advanced Technology in Experimental Mechanics : Asian Conference on Experimental Mechanics. 2015. 2015. 14. 80-80
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Books (1)：
Lectures and oral presentations (91)：
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非定常拡散挙動に根拠を持つVDSR法による熱音響非破壊像の画像改質
(日本機械学会関西支部第99期定時総会講演会 2024)
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ウォーターピーニング処理を施したA5052合金の回転曲げ疲労寿命に及ぼすピーニング圧の影響
(日本機械学会九州支部第77期総会・講演会 2024)
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一定振幅荷重下におけるA2024/A6061摩擦攪拌接合材の疲労寿命
(日本機械学会九州支部第77期総会・講演会 2024)
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A5052はく離型接着接合継手のはく離強度に及ぼす水浸漬の影響
(日本機械学会九州支部第77期総会・講演会 2024)
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溶体化処理を施した A6061/SUS304 異種金属摩擦攪拌接合材の疲労寿命
(日本材料学会九州支部第10回学術講演会 2023)
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Works (7)：
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変動荷重下における摩擦攪拌接合Al合金の疲労き裂進展挙動の解明
2010 - 2013
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大形回転機の機械的問題の研究
2011 - 2012
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大形回転機の機械的問題の研究
2010 - 2011
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大型回転機の機械的問題の研究
2009 - 2010
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変動荷重下における摩擦攪拌接合アルミニウム合金の疲労強度に関する研究
2006 - 2008
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Education (4)：
- - 2000 Osaka University
- - 2000 Osaka University Graduate School, Division of Engineering
- - 1994 Osaka University School of Engineering
- - 1994 Osaka University Faculty of Engineering
Professional career (2)：
- Doctor(Engineering) (Osaka University)
- Master(Engineering) (Osaka University)
Work history (5)：
- 2007/04 - 現在 Nagasaki University
- 2006/04 - 2007/03 Nagasaki University
- 2004/09 - 2006/03 Nagasaki University
- 2000/04 - 2004/08 Osaka University Graduate School of Engineering
- 2000 - 2004 Research Associate
Committee career (5)：
- 2020/03 - 2021/02 日本機械学会九州支部 長崎地区地区長
- 2019/04 - 2020/03 日本機械学会 九州学生会顧問
- 2019/04 - 2020/03 日本機械学会九州支部 商議員
- 2008 - 日本機械学会 九州学生会顧問
- 2000 - 日本材料学会 疲労部門委員
Awards (1)：
Association Membership(s) (5)：
溶接学会
, 日本軽金属学会
, 日本金属学会
, 日本材料学会
, 日本機械学会
