Updated on 2025/09/18

写真a

 
Arakawa Jinta
 
Organization
Faculty of Environmental, Life, Natural Science and Technology Assistant Professor
Position
Assistant Professor
External link

Degree

  • Ph.D (Engineering) ( 2020.3   Hiroshima University )

Research Interests

  • 金属疲労,破壊力学,微小き裂進展

Research Areas

  • Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Mechanics of materials and materials

Education

  • 広島大学 博士(工学)    

    2020.3

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Research History

  • 岡山大学 学術研究院環境生命自然科学学域(工)   研究准教授

    2023.10

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  • 広島大学デジタルものづくり教育研究センター   客員講師

    2022.7

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  • Okayama University   学術研究院 環境生命自然科学学域(工)   Assistant Professor

    2022.4

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  • Hiroshima University   デジタルものづくり教育研究センター

    2020.4 - 2022.3

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Committee Memberships

  •   日本鉄鋼協会 正会員  

    2022.10   

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  •   日本機械学会 正員  

    2020.4   

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  •   日本材料学会 正会員  

    2020.4   

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Papers

  • Investigation of factors influencing rotating bending fatigue properties of carburized steel using large data source Reviewed

    Shogo Takesue, Yuki Nakamura, Jinta Arakawa, Koichiro Nambu, Yuji Ichikawa, Hiroyuki Akebono, Kiyotaka Masaki, Shoichi Kikuchi

    International Journal of Fatigue   198   109041 - 109041   2025.9

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    Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.ijfatigue.2025.109041

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  • Clarification of Fatigue Fracture Mechanism on Overlap Friction Stir Welding (FSW) Joints of A5052 Aluminum Alloys Reviewed

    Jinta Arakawa, Shota Ban, Yuki Ogawa, Eitaro Yukutake

    Fatigue & Fracture of Engineering Materials & Structures   2025.4

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    Authorship:Lead author, Corresponding author   Publishing type:Research paper (scientific journal)   Publisher:Wiley  

    DOI: 10.1111/ffe.14644

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  • Effects of elastic anisotropy on the small fatigue crack deflection behavior of α-brass Reviewed

    Jinta Arakawa, Ryushin Kamada, Ryo Yabuki, Yuki Ogawa, Hiroyuki Akebono, Atsushi Sugeta

    Journal of Materials Research and Technology   35   3170 - 3182   2025.3

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    Authorship:Lead author, Corresponding author   Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.jmrt.2025.01.085

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  • Evaluation of small fatigue crack deflection behavior on copper using electron backscatter diffraction and crystal plasticity finite element analysis Reviewed

    Jinta Arakawa, Ryo Yabuki, Takeshi Uemori, Masato Ito, Kenichi Yaguchi

    Engineering Failure Analysis   170 ( 15 )   109242   2025.3

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  • Elucidation of small fatigue crack initiation and propagation behavior on polycrystal Ti-22V-4Al

    Jinta Arakawa, Koki Hirazumi, Takeshi Uemori, Yoshito Takemoto

    Procedia Structual Integrity   66 ( 2024 )   38 - 48   2025.1

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  • Fatigue Limit Estimation of Carburized Steels Treated with Shot Peening

    菊池将一, 荒川仁太, 武末翔吾, 南部紘一郎, 中村裕紀, 曙紘之

    熱処理   65 ( 1 )   2025

  • Prediction of fatigue crack initiation sites on Ti-22V-4Al using crystal plasticity FEM considering polycrystal orientation and crystal grain size Reviewed

    Jinta Arakawa, Koki Hirazumi, Takeshi Uemori, Yoshito Takemoto

    100065   2025

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  • Reverse Shape Memory Effect and Toughness Recovery of Ti-10V-2Fe-3Al Alloy Reviewed

    Yoshito Takemoto, Daiki Shinomiya, Taiki Ishihara, Hiroto Yokota, Jinta Arakawa

    Journal of the Japan Institute of Metals and Materials   88 ( 10 )   239 - 244   2024.10

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Japan Institute of Metals  

    Ti-10V-2Fe-3Al alloys exhibit shape memory (SM) and reverse shape memory (RSM) effects. When an alloy sample that has been strained by external force at room temperature is heated, the strain recovers and SM effect develops at around 300℃, but as the temperature increases further, the shape changes in the opposite direction due to RSM effect at around 450℃. This RSM effect has potential applications in forming processes such as thin-walled pipes, but has the disadvantage that the RSM treatment makes the material very brittle. Therefore, in this study, a heat treatment to restore toughness while maintaining the shape after forming was investigated. The alloy quenched from 1050℃ had a microstructure consisting of a β matrix phase and α′′-martensite (α′′Mq). Differential scanning calorimetry (DSC) results showed that the continuous heating process occurred in the following order: α′′Mq → β reverse transformation, ω formation, ω disappearance, thermally induced α′′iso phase formation, α precipitation and α → β transformation. Ageing at 300℃, where the SM effect appears, caused significant embrittlement due to the formation of the ageing ω phase. Ageing treatment at 450℃, where the RSM effect is obtained, resulted in the formation of a fine α phase, which also caused significant embrittlement. On the other hand, additional aging at 600℃ for 1.8 ks after RSM treatment significantly improved the toughness and produced material properties comparable to aerospace material specifications. It was found that the embrittlement in the RSM treatment was due to the precipitation of fine α phase, and that the growth of α phase with a width of about 0.2 µm or more was required for toughness recovery. It was also found that the specimen shape formed by the RSM treatment hardly changed after the additional heat treatment of 1.8 ks at 600℃.

    DOI: 10.2320/jinstmet.j202403

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  • Crystal plasticity analysis of fatigue crack initiation site considering crystallographic orientation in Ti–22V–4Al alloy Reviewed

    Jinta Arakawa, Koki Hirazumi, Takeshi Uemori, Yoshito Takemoto

    Results in Engineering   23   2024.9

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.rineng.2024.102405

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  • Relationship between weld rip diameter and fatigue fracture mode for friction stir spot welded tension-peel joints Reviewed

    Miu Hayashi, Itsuki Fujita, Takumi Itadani, Jinta Arakawa, Yasuhiro Aoki, Hidetoshi Fujii, Hiroyuki Akebono, Atsushi Sugeta

    Fatigue and Fracture of Engineering Materials and Structures   47 ( 6 )   2127 - 2138   2024.6

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1111/ffe.14295

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  • Reverse Shape Memory Effect and Toughness Recovery of Ti-10V-2Fe-3Al Alloy

    竹元嘉利, 四宮大輝, 石原大暉, 横田啓人, 荒川仁太

    日本金属学会誌(Web)   88 ( 10 )   2024

  • Elucidation of Fatigue Fracture Mechanism on Glass-Fiber-Reinforced-Plastics Reviewed

    J. Arakawa, M. Sakai, M. Hayashi, H. Akebono, A. Sugeta, J. Ohshita, H. Tanizawa, K. Shimizu, J. Ogawa

    Lecture Notes in Mechanical Engineering   213 - 222   2024

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    Publishing type:Research paper (international conference proceedings)  

    DOI: 10.1007/978-981-99-8643-9_24

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  • Molding and Structure Co-Analysis of Injection Molding Composites Considering Heterogeneity in the Thickness Direction+1 Reviewed

    Chikara Kawamura, Yasuhiro Morita, Mitsugi Fukahori, Masanori Honda, Jinta Arakawa, Hiroyuki Akebono, Atsushi Sugeta

    Materials Transactions   65 ( 2 )   184 - 193   2024

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.2320/matertrans.MT-Z2023012

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  • Fatigue Limit Diagram for Ferritic Stainless Steels Subjected to Excess Deformation under Fixed Maximum Stress Conditions Reviewed

    Miu Hayashi, Takeshi Ando, Ryohei Gonda, Keishi Kitabatake, Jinta Arakawa, Hiroyuki Akebono, Atsushi Sugeta

    Materials Transactions   65 ( 5 )   512 - 517   2024

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.2320/matertrans.MT-Z2023016

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  • Fatigue Limit Diagrams for Ferritic Stainless Steel subjected to Excess Deformation under Fixed Maximum Stress Conditions Reviewed

    林美佑, 安藤武史, 權田良平, 北畠啓史, 荒川仁太, 曙紘之, 菅田淳

    材料   72 ( 7 )   535 - 541   2023.7

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:The Society of Materials Science, Japan  

    DOI: 10.2472/jsms.72.535

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    Other Link: https://ndlsearch.ndl.go.jp/books/R000000004-I032985421

  • Effect of pre-water immersion period on fatigue resistance of adhesive bonded thin steel Reviewed

    Jinta Arakawa, Wataru Jinnouchi, Hiroyuki Akebono, Atsushi Sugeta

    Int. J. Fatigue   174   107725   2023.5

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.ijfatigue.2023.107725

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  • Combined effect of surface morphology and residual stress induced by fine particle and shot peening on the fatigue limit for carburized steels Reviewed

    Shoichi Kikuchi, Kenta Minamizawa, Jinta Arakawa, Hiroyuki Akebono, Shogo Takesue, Mamoru Minamizawa

    International Journal of Fatigue   168   107441   2023.3

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.ijfatigue.2022.107441

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  • Study on the Cross-Section Shape for Automotive Frame on Multiple Axial Loads Reviewed

    河村力, 河村力, 本田正徳, 荒川仁太, 曙紘之, 菅田淳

    自動車技術会論文集(Web)   54 ( 4 )   2023

  • 射出成形複合材の繊維配向の不均質性を考慮した自動車用H型部材の成形-構造連成解析の検討 Reviewed

    河村 力, 森田 泰博, 深堀 貢, 本田 正徳, 荒川 仁太, 曙 紘之, 菅田 淳

    材料   2023

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  • Molding and Structure Co-Analysis of Injection Molding Composites Considering Heterogeneity in the Thickness Direction Reviewed

    河村力, 森田泰博, 深堀貢, 本田正徳, 荒川仁太, 曙紘之, 菅田淳

    材料   72 ( 9 )   675 - 682   2023

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:The Society of Materials Science, Japan  

    DOI: 10.2472/jsms.72.675

    DOI: 10.2472/jsms.73.165_references_DOI_KQc3HDXeAmhhzjtKhEbsC7RDJ4L

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    Other Link: https://ndlsearch.ndl.go.jp/books/R000000004-I033074517

  • Estimation of the fatigue crack initiation site and life of Ti-6Al-4V alloy for two types of circle and slender crystal grains

    Jinta Arakawa, Yuya Kawahara, Yukihiko Kimura, Shotaro Hashimoto, Hiroyuki Akebono, Atsushi Sugeta

    International Journal of Fatigue   181   2023

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.ijfatigue.2023.108097

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  • Study on the Cross-Section Shape for Automotive Frame on Multiple Axial Loads

    Kawamura Chikara, Honda Masanori, Arakawa Jinta, Akebono Hiroyuki, Sugeta Atsushi

    Transactions of Society of Automotive Engineers of Japan   54 ( 4 )   738 - 744   2023

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    Language:Japanese   Publisher:Society of Automotive Engineers of Japan  

    Due to the tightening of CO2 regulations for automobiles, it is required to significantly improve fuel efficiency, and reduce the weight of the car body. On the other hand, the demand for improving crash safety performance is increasing, and achieving both weight reduction and crash safety performance are a major issue in future automobile body development. Therefore, it is necessary to improve the strength and weight reduction of the frame that constitutes the car body. In this study, we assume an automobile structure that receives multiple axial loads, and perform multipurpose optimization of the cross-sectional shape. For the purpose of improving strength and reducing mass under the conditions of multiple axial loads, optimized cross-sectional shape. The design variable was the XY coordinates of the vertices of the cross section. Objective function was maximize torsional strength, maximize bending strength and mass minimization. As a result of the optimization, We not only get a lightweight cross-section, but also revealed that transition of the cross-sectional shape on the Pareto line of torsional strength and bending strength is existed. In addition, the mechanical validity was verified from the viewpoint of buckling.

    DOI: 10.11351/jsaeronbun.54.738

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  • An evaluation of fatigue crack initiation in Ti-6Al-4V alloy by Schmid factor Reviewed

    Jinta Arakawa, Hiroki Sato, Ryosuke Handa, Yukihiko Kimura, Shotaro Hashimoto, Hiroyuki Akebono, Atsushi Sugeta

    MATERIALS SCIENCE AND TECHNOLOGY   39 ( 5 )   557 - 566   2022.9

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1080/02670836.2022.2127982

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  • Effect of fiber orientation on the fatigue crack initiation and propagation of glass fiber reinforced plastics Reviewed

    Michiya Sakai, Jinta Arakawa, Hiroyuki Akebono, Atsushi Sugeta, Joji Ohshita, Hiroki Tanizawa, Katsunori Shimizu, Junichi Ogawa

    JOURNAL OF APPLIED POLYMER SCIENCE   139 ( 44 )   2022.9

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1002/app.53088

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  • Fatigue limit estimation for carburized steels with surface compressive residual stress considering residual stress relaxation Reviewed

    Kenta Minamizawa, Jinta Arakawa, Hiroyuki Akebono, Koichiro Nambu, Yuki Nakamura, Mamoru Hayakawa, Shoichi Kikuchi

    INTERNATIONAL JOURNAL OF FATIGUE   160   2022.7

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.ijfatigue.2022.106846

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  • Effects of welding defects on the fatigue properties of spot welded automobile steel sheets and the establishment of a fatigue life evaluation method Reviewed

    Yuki Ogawa, Ichiro Ohara, Jinta Arakawa, Hiroyuki Akebono, Atsushi Sugeta

    WELDING IN THE WORLD   66 ( 4 )   745 - 752   2022.4

  • Effect of Linear Weld Angle on Fatigue Strength of phi-Shaped Laser Welded Joints Reviewed

    Tomohiro Sannomiya, Daisuke Nakamura, Jinta Arakawa, Tadashi Kado, Tomohito Tsudo, Seiya Takahashi, Masashi Hiraoka, Hiroyuki Akebono, Atsushi Sugeta

    MATERIALS TRANSACTIONS   63 ( 4 )   570 - 578   2022

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.2320/matertrans.MT-M2021223

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  • Analysis of Fatigue Crack Propagation Behavior of Structures with One-Sided Welding in Fillet Welded Joint for Load-Carrying Type Reviewed

    Takamasa Abe, Jinta Arakawa, Hiroyuki Akebono, Atsushi Sugeta

    MATERIALS TRANSACTIONS   63 ( 7 )   1037 - 1045   2022

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    DOI: 10.2320/matertrans.MT-Z2022003

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  • Elucidation of fatigue characteristics and fracture mechanism of friction stir spot-welded tension-shear joint steels Reviewed

    Thomasprabhu Selvaraj, Shogo Ishida, Jinta Arakawa, Hiroyuki Akebono, Atsushi Sugeta, Yasuhiro Aoki, Hidetoshi Fujii

    FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES   44 ( 1 )   74 - 84   2021.1

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1111/ffe.13332

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  • Life prediction of oxide dispersion-strengthened platinum–rhodium alloy subjected to high-temperature bending fatigue under axial stress Reviewed

    A. Niwa, Y. Akita, J. Arakawa, H. Akebono, A. Sugeta

    International Journal of Fatigue   140   2020.11

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.ijfatigue.2020.105808

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  • Evaluating the fatigue limit of metals having surface compressive residual stress and exhibiting shakedown Reviewed

    Jinta Arakawa, Tatsuya Hanaki, Yoshiichirou Hayashi, Hiroyuki Akebono, Atsushi Sugeta

    FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES   43 ( 2 )   211 - 220   2020.2

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1111/ffe.13097

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  • Effect of Shakedown on the Fatigue Limit of Ultrasonic Shot Peened Steel Reviewed

    Jinta Arakawa, Yoshiichirou Hayashi, Hiroyuki Akebono, Atsushi Sugeta

    ADVANCED SURFACE ENHANCEMENT, INCASE 2019   69 - 75   2020

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    Language:English   Publishing type:Research paper (international conference proceedings)  

    DOI: 10.1007/978-981-15-0054-1_8

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  • Effectiveness of Ultrasonic Shot Peening on Stainless Cast Steel SCS6 Containing a Fatigue Crack Reviewed

    Jinta Arakawa, Yoshiichirou Hayashi, Hiroyuki Akebono, Atsushi Sugeta

    MATERIALS TRANSACTIONS   61 ( 8 )   1593 - 1599   2020

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.2320/matertrans.Z-M2020829

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  • The effects of crystallographic orientation on fatigue crack initiation behavior in Ti-6Al-4V Reviewed

    Shun Sasaoka, Jinta Arakawa, Hiroyuki Akebono, Atsushi Sugeta, Yoshihisa Shirai, Eisuke Nakayama, Yukihiko Kimura

    INTERNATIONAL JOURNAL OF FATIGUE   117   371 - 383   2018.12

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    DOI: 10.1016/j.ijfatigue.2018.07.039

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  • Effect of surface compressive residual stress introduced by surface treatment on fatigue properties of metallic material Reviewed

    Jinta Arakawa, Tatsuya Hanaki, Yoshiichirou Hayashi, Hiroyuki Akebono, Atsushi Sugeta

    12TH INTERNATIONAL FATIGUE CONGRESS (FATIGUE 2018)   165   2018

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    Language:English   Publishing type:Research paper (international conference proceedings)  

    DOI: 10.1051/matecconf/201816518006

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  • Fatigue strength of USP treated ASTM CA6NM for hydraulic turbine runner Reviewed

    J. Arakawa, M. Kakuta, Y. Hayashi, R. Tanegashima, H. Akebono, M. Kato, A. Sugeta

    Surface Engineering   30 ( 9 )   662 - 669   2014.9

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1179/1743294414Y.0000000308

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  • Effect of ultrasonic shot peening on the fatigue strength of stainless cast steel ASTM CA6NM for hydraulic turbine runner Reviewed

    Jinta Arakawa, Motoki Kakuta, Yoshiichirou Hayashi, Ryota Tanegashima, Hiroyuki Akebono, Masahiko Kato, Atsushi Sugeta

    Advanced Materials Research   891-892   649 - 655   2014

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    Publishing type:Research paper (international conference proceedings)  

    DOI: 10.4028/www.scientific.net/AMR.891-892.649

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MISC

  • My Research

    ARAKAWA Jinta

    Journal of the Society of Materials Science, Japan   73 ( 12 )   963   2024.12

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    Language:Japanese   Publisher:The Society of Materials Science, Japan  

    DOI: 10.2472/jsms.73.963

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  • A Study of Molding-Structure Co-Analysis for Automotive H-Shaped Components Considering Fiber Orientation Heterogeneity in Injection Molded Composites

    KAWAMURA Chikara, MORITA Yasuhiro, FUKAHORI Mitsugi, HONDA Masanori, ARAKAWA Jinta, AKEBONO Hiroyuki, SUGETA Atsushi

    Journal of the Society of Materials Science, Japan   73 ( 2 )   165 - 171   2024.2

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    Language:Japanese   Publisher:The Society of Materials Science, Japan  

    Injection molded composites, which are increasingly being applied to automobiles, have a distribution of fiber orientation within the part, making it difficult to ensure the accuracy of structural analysis. In particular, it is necessary to correctly predict edge stresses in order to predict bending strength properties. To this end, we proposed in a previous report a coupled forming and structural analysis method that can account for heterogeneity in fiber orientation in the thickness direction, and demonstrated its superiority in three-point bending of a flat plate in the out-of-plane direction. However, we have not been able to verify the accuracy of the analysis for in-plane direction loading or the accuracy when the orientation is uniform in the plate thickness direction. Therefore, the validity of this method was verified on an H-shaped material intended for automotive parts. Talbot-Law imaging and micro X-ray CT imaging were used to ensure the accuracy of the fiber orientation tensor of the entire structure and the flange ends, and then coupled analysis was performed. The analysis error of the conventional method for both maximum generated load and rupture displacement was around 30%, whereas the new method was within 4%, confirming its significance.

    DOI: 10.2472/jsms.73.165

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    Other Link: https://ndlsearch.ndl.go.jp/books/R000000004-I033349014

  • Elucidation of Crack Growth Mechanisms Considering Local Anisotropy

    鎌田隆辰, 林美佑, 荒川仁太, 曙紘之, 菅田淳

    日本材料学会学術講演会講演論文集(CD-ROM)   73rd   2024

  • Effect of grain boundary on small fatigue crack propagation on α-brass

    荒川仁太, 上森武, 矢吹涼, 伊藤正登, 谷口兼一

    疲労シンポジウム講演論文集   36th   2024

  • Quantitative evaluation of fatigue crack initiation on Ti-6Al-4V alloy by using Schmid factor

    Jinta Arakawa, Hiroyuki Akebono, Atsushi Sugeta

    2023.7

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  • レーザパターニング表面処理による高耐久性能を実現する接着接合接手の開発

    荒川 仁太

    天田財団助成研究成果報告書   36   401   2023

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    Language:Japanese   Publisher:公益財団法人 天田財団  

    DOI: 10.32163/amadareport.36.0_401

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    Other Link: https://ndlsearch.ndl.go.jp/books/R000000004-I033295853

  • Making of fatigue limit diagram in consideration of a big pre-strain

    林美佑, 安藤武史, 權田良平, 北畠啓史, 荒川仁太, 曙紘之, 菅田淳

    日本材料学会学術講演会講演論文集(CD-ROM)   71st   2022

  • Influence of Tool Shape on Fatigue Cracks of Friction Stir Spot Welded Dissimilar Aluminum alloys

    野瀬悠生, 北川和也, 荒川仁太, 曙紘之, 杉本幸弘, 菅田淳

    日本材料学会学術講演会講演論文集(CD-ROM)   71st   2022

  • Establishment of Fatigue Limit Diagrams for Stainless Steels Subjected to Excessive Deformation

    2022

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  • Evaluation of Fatigue Properties of CFRP/Al Weld-Bonded Joints Using Friction Stir Spot Welding and Adhesives

    峯岡誠太郎, 荒川仁太, 小川裕樹, 曙紘之, 杉本幸弘, 菅田淳

    疲労シンポジウム講演論文集   35th   2022

  • Making of fatigue limit diagrams under fixed maximum stress conditions considering excessive pre-strain

    林美佑, 安藤武史, 權田良平, 北畠啓史, 荒川仁太, 曙紘之, 菅田淳

    疲労シンポジウム講演論文集   35th   2022

  • Evaluation of Fatigue Strength on Adhesive Bonded Joints Treated by Laser Patterning

    臼井康貴, 四ツ谷隆太, 曙紘之, 菅田淳, 荒川仁太

    疲労シンポジウム講演論文集   35th   2022

  • Elucidation of Failure Mechanism of Friction Stir Spot Welding (FSSW) Tensile-Peel Joint of High Strength Steel Sheets for Automobiles

    板谷拓実, 藤田一輝, 荒川仁太, 曙紘之, 菅田淳, 青木祥宏, 藤井英俊

    日本材料学会学術講演会講演論文集(CD-ROM)   71st   2022

  • Effect of Fiber Orientation on Crack Initiation and Propagation in Short Glass Fiber PP

    酒井宙也, 荒川仁太, 志水克教, 小川淳一, 谷澤浩樹, 大下浄治, 曙紘之, 菅田淳

    日本材料学会学術講演会講演論文集(CD-ROM)   71st   2022

  • Fatigue limit estimation for carburized steels considering surface texture and relaxation of compressive residual stress

    MINAMIZAWA Kenta, TAKESUE Shogo, ARAKAWA Jinta, AKEBONO Hiroyuki, NAMBU Koichiro, NAKAMURA Yuki, KIKUCHI Shoichi

    The Proceedings of the Materials and Mechanics Conference   2021   OS0818   2021

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    In order to estimate the fatigue limit of carburized steels having surface compressive residual stress and surface texture generated by peening, we investigated the effect of surface texture and residual stress relaxation on the fatigue limit of carburized steels. In this study, rotating bending fatigue tests were conducted for the carburized steels treated with electrochemically polishing, fine particle peening and shot peening prior to gas carburizing. In the proposed fatigue limit estimation method for carburized steels, the surface texture formed by peening and the sum of mean stress and compressive residual stress experiencing relaxation are considered. The method shows that the maximum value of fatigue limit of carburized steels increased with decreasing the waviness in the surface. Additionally, the lower the waviness in the surface, the lower the maximum value of compressive residual stress contributing to the increased fatigue limit of carburized steel. These results indicate that fatigue limit of the carburized steel depends on the surface texture formed by peening.

    DOI: 10.1299/jsmemm.2021.os0818

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  • Evaluation of Fatigue Properties Under Repeated Two Step Loading of Al/CFRP Different Material Spot Welding Joints

    MINEOKA Seiaro, NAKAHARA Fumiya, ARAKAWA Jinta, OGAWA Yuki, AKEBONO Hiroyuki, Tanaka Kojiro, SUGETA Atsushi

    The Proceedings of the Materials and Mechanics Conference   2021   OS0826   2021

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    In order to investigate the fatigue properties under varying loading conditions in a heat welding joint by friction stir spot welding of aluminum alloy and CFRP, this study was carried out repeated two-step loading test. Moreover, this study was established a fatigue damage evaluation method with safety and high accuracy under two-step loading conditions. As a result, a fatigue life of joints under constant force amplitude conditions was 2.85 times the difference between the regression line by the least-squares methods and the fatigue life having the failure probability from 10 to 90 %. Moreover, the cumulative damage of the joints based on the Miner’s law was much lower than 1, the effect of load interaction on fatigue life of the joints was confirmed under varying loading conditions. Therefore, the fatigue damage evaluation of the joints with the safe side and high accuracy under varying loading conditions could be achieved by considering a variation of the fatigue life of the joints using confidence intervals and correcting the effect of load interaction using Corten-Dolan method.

    DOI: 10.1299/jsmemm.2021.os0826

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  • Effect of Characteristics and Particle Size of Fillers on Fatigue Strength of Elastomers

    林圭亮, 荒川仁太, 甲斐裕之, 大竹恵子, 岡崎博昭, 大下浄治, 曙紘之, 菅田淳

    破壊力学シンポジウム講演論文集   20th   2021

  • Effect of Water Degradation on Fatigue Crack Growth Rate of Adhesive Bonding and its Quantitative Evaluation, Japan

    橘知哉, 荒川仁太, 曙紘之, 菅田淳

    破壊力学シンポジウム講演論文集   20th   2021

  • Elucidation of Small Fatigue Crack Initiation and Growth Mechanism of Metal

    伊藤颯茉, 荒川仁太, 曙紘之, 菅田淳

    日本材料学会学術講演会講演論文集(CD-ROM)   70th   2021

  • Effect of pre-plastic strain on fatigue limit of ferritic stainless steel

    林美佑, 權田良平, 北畠啓史, 荒川仁太, 曙紘之, 菅田淳

    日本材料学会学術講演会講演論文集(CD-ROM)   70th   2021

  • Evaluation of fatigue life under block loading including cycles below the fatigue limit up to very high cycle regime

    2021

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  • Fatigue Crack Behavior on Thin Steel Sheets Welded by Friction Stir Spot Welding

    2020.5

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  • Effectiveness of Ultrasonic Shot Peening on Stainless Cast Steel SCS6 Containing a Fatigue Crack

    ARAKAWA Jinta, HAYASHI Yoshiichirou, AKEBONO Hiroyuki, SUGETA Atsushi

    Journal of the Society of Materials Science, Japan   68 ( 12 )   897 - 903   2019.12

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    In order to investigate the effectiveness of ultrasonic shot peening treatment (USP) as repairing method for SCS6 material with surficial fatigue crack for hydraulic turbine runner, plane bending fatigue tests were carried out for USP treated SCS6 containing a surface fatigue crack with 1 mm in length and the fatigue crack propagation after USP was observed by a plastic replica method. As a result, the fatigue crack propagation life of SCS6 containing a surface fatigue crack was dramatically improved by USP treatment. Furthermore, the initial effective stress intensity factor ranges were calculated in the USP treated and untreated SCS6 containing a surface fatigue crack, respectively. According to the calculation, it was clear that the surficial fatigue crack could be harmless under the condition that the calculated initial effective stress intensity factor range considering the stress opening a fatigue crack, which was acquired by the unloading elastic compliance method, was less than the threshold of effective stress intensity factor range. Therefore, USP treatment is effective for repairing method of SCS6 containing surficial fatigue crack for hydraulic turbine runner.

    DOI: 10.2472/jsms.68.897

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    Other Link: http://id.ndl.go.jp/bib/030144549

  • Quantitative evaluation of small fatigue crack deflection behavior in metals based on T-stress

    Jinta Arakawa, Hiroyuki Akebono, Atsushi Sugeta

    2019.9

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  • α-黄銅における微小疲労き裂の微視的観察および結晶方位解析を用いた屈曲挙動予測

    小林壮, 荒川仁太, 曙紘之, 菅田淳

    日本材料学会学術講演会講演論文集   68th   2019

  • Elucidation of fatigue fracture properties on laser spot welded stainless sheet

    三宮知大, 中村大祐, 荒川仁太, 曙絋之, 山本元道, 菅田淳

    溶接構造シンポジウム講演論文集(CD-ROM)   2019   2019

  • レーザースポット溶接による薄板鋼板接合継手の疲労特性評価

    中村大祐, 三宮友大, 荒川仁太, 曙紘之, 山本元道, 菅田淳

    機械・構造物の強度設計,安全性評価に関するシンポジウム前刷集   16th   2019

  • 表層に圧縮残留応力を有する金属材料の疲労限度推定手法

    荒川仁太, 曙紘之, 菅田淳, 林義一郎

    機械・構造物の強度設計,安全性評価に関するシンポジウム前刷集   16th   2019

  • EVALUATION OF FATIGUE CRACK INTIATION SITE ON TI-6AL-4V BASED ON SCHMID FACTOR

    Jinta ARAKAWA, Hiroki SATO, Hiroyuki AKEBONO, Atsushi SUGETA, Yoshihisa SHIRAI, Eisuke NAKAYAMA, Yukihiko KIMURA

    2018.9

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  • Numerical evaluation of small fatigue crack deflection behavior based on stress state around crack tip

    荒川仁太, 小林壮, 曙紘之, 菅田淳

    疲労シンポジウム講演論文集   34th   2018

  • α-黄銅の微小疲労き裂屈曲挙動観察ならびに結晶方位に基づく屈曲挙動予測

    佐藤祐希, 荒川仁太, 曙紘之, 菅田淳

    日本材料学会学術講演会講演論文集   67th   2018

  • AFMを援用したα-黄銅の微小疲労き裂進展挙動のその場観察

    佐藤祐希, 荒川仁太, 曙紘之, 菅田淳

    機械・構造物の強度設計,安全性評価に関するシンポジウム前刷集   15th   2017

  • α-黄銅における微小き裂進展挙動のすべり因子による定量的評価

    荒川仁太, 佐藤祐希, 曙紘之, 菅田淳

    高温強度シンポジウム前刷集   55th   2017

  • Effect of Ultrasonic Shot Peening on the Fatigue Strength of SCS6 for Hydraulic Turbine Runner

    Jinta Arakawa, Motoki Kakuta, Yoshiichirou Hayashi, Hiroyuki Akebono,Masahiko Kato,Atsushi Sugeta

    2014.3

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  • G0310601 Improving the fatigue strength of stainless cast steel SCS6 for hydraulic turbine runner by ultrasonic shot peening treatment

    ARAKAWA Jinta, HAYASHI Yoshiichirou, TANEGASHIMA Ryota, AKEBONO Hiroyuki, KATO Masahiko, SUGETA Atsushi

    The Proceedings of Mechanical Engineering Congress, Japan   2014   _G0310601- - _G0310601-   2014

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    In this study, the effect of ultrasonic shot peening (USP) treatment on the fatigue strength of stainless cast steel SCS6 for hydraulic turbine runner was investigated carrying out plane bending fatigue tests for USP treated material and untreated material. According to the fatigue test results, it was clear that the fatigue strength of SCS6 was improved by USP treatment, especially, the fatigue limit was 60 % improved. The reasons of the fatigue strength enhancement are thought to be the effects of high hardness and compressive residual stress generated by USP treatment. In addition, the effectiveness of USP treatment on the fatigue strength of SCS6 having the fatigue crack was also examined, The specimen was made by performing USP treatment after creating the fatigue crack of about 1 mm by using the plane bending fatigue test machine. The results of the fatigue tests indicated that USP treatment delayed the fatigue crack propagation compared with the case of USP untreated, The main reason of above results was that the fatigue crack propagation resistance was increased by the compressive residual stress generated by USP treatment, in other words, the stress intensity factor K was decreased by that factor. According to these results, it can be said that USP treatment is very effective method to improve the fatigue strength of SCS6.

    DOI: 10.1299/jsmemecj.2014._g0310601-

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  • 発電用水車ランナ材SCS6の疲労特性に及ぼす超音波ショットピーニングの影響

    荒川仁太, 角田志樹, 曙紘之, 加藤昌彦, 菅田淳, 林義一郎

    日本材料学会学術講演会講演論文集   62nd   2013

  • OS2110 Effect of ultrasonic shot peening on the fatigue crack initiation and propagationbehavior of stainless cast steel SCS6 for the turbine runner of hydraulic power generation

    KAKUTA Motoki, ARAKAWA Jinta, HAYASHI Yoshiichiro, AKEBONO Hiroyuki, KATO Masahiko, SUGETA Atsushi

    The Proceedings of the Materials and Mechanics Conference   2012   _OS2110-1_ - _OS2110-3_   2012

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    This study aimed to examine the effect of ultrasonic shot peening (USP) process on the fatigue strength of stainless cast steel JIS SCS6 for hydraulic turbine runner. Fatigue test was carried out in laboratory air room temperature using the specimens which was treated USP (USP specimen) and was not (Virgin specimen). It was found that the modified layer formed by USP process had high hardness and compressive residual stress. The fatigue strength of USP specimen rose about 60% in comparison with Virgin specimen. The fatigue crack in each type specimen was observed in detail by using plastic replica technique. The fatigue crack initiation life of USP specimen was more extension than that of Virgin specimen. The fatigue crack propagation rate of USP specimen was lower than that of Virgin specimen. The modified layer formed by USP process affects the fatigue crack initiation life and the propagation rate. The two reasons are the factor of the improvement of the fatigue strength by USP process.

    DOI: 10.1299/jsmemm.2012._os2110-1_

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Awards

  • 研究功績賞

    2024.3   岡山大学工学部  

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  • 令和3年度日本材料学会学術奨励賞

    2022.5  

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  • 令和2年度日本材料学会疲労部門委員会論文賞

    2021.5  

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Research Projects

  • 高分子/カーボンの高機能グラデーション層による接着接合継手の耐久性能向上

    Grant number:25K17510  2025.04 - 2028.03

    日本学術振興会  科学研究費助成事業  若手研究

    荒川 仁太

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    Grant amount:\4810000 ( Direct expense: \3700000 、 Indirect expense:\1110000 )

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  • Development of innovative multi-material joining technology for CN using mechanical and chemical effects

    Grant number:23K03593  2023.04 - 2026.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    曙 紘之, 小川 裕樹, 荒川 仁太

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    Grant amount:\4680000 ( Direct expense: \3600000 、 Indirect expense:\1080000 )

    抵抗スポット溶接,レーザ溶接,摩擦撹拌接合など各種接合技術は,自動車産業はもちろ
    ん,多くの産業分野における重要技術である.中でもカーボンニュートラル達成のためには,異種材料を接合するマルチマテリアル接合が重要技術となる.本研究では,異種材料間にて適用可能である「接着接合」に注目し,元素拡散による化学的効果,ならびにマイクロレーザパターニングを用いた機械的効果双方を援用し,従来の接着接合技術と比較し,革新的な高強度・高耐久性を有するマルチマテリアル接着接合技術を開発することを目的とし,①接着剤との高い密着性を発現する被着材表面創製,②優れた強度・耐久性を有するマルチマテリアル接着接合継手の実現および破壊機構解明を実施する.
    令和5年度においては, 元素拡散処理システムの改良および鋼板SPFC590Yを対象とし接着剤塗布面に対し元素拡散処理による元素拡散層の形成,ならびに高密度レーザを用いたマイクロレーザパターニングMLPの形成を実施した.
    元素拡散処理システムの改良については,高周波誘導加熱コイル下部にステッピングモーター駆動ステージを取り付けることによりより広範囲への処理が可能となるよう改良を行った.また鋼板表層への表面処理については,クロムCrおよびニッケルNiの2種類の投射材を用いた元素拡散処理を施し,また高密度レーザを用い接着剤塗布面に対しMLPを直線型,波型,格子型に施し,その後の観察および各種分析により,Steel鋼板表層には所望の元素拡散処理およびMLP処理が可能であることを確認した.
    翌年以降は,アルミニウム合金板AA5182に対しても同様の元素拡散処理およびMLP処理を施した後,Steel鋼板およびアルミニム合金板それぞれを炭素繊維強化プラスチック
    CFRPと接着接合したせん断引張型マルチマテリアル接着接合継手を作製し,その静的強度特性ならびに動的強度特性を実験的に検討する予定である.

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  • 高耐久性能を有する架橋型ガラス繊維複合レーザー溶接継手の開発

    Grant number:22K14148  2022.04 - 2025.03

    日本学術振興会  科学研究費助成事業 若手研究  若手研究

    荒川 仁太

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    Grant amount:\4680000 ( Direct expense: \3600000 、 Indirect expense:\1080000 )

    レーザ溶接継手での疲労強度向上効果に先立ち,摩擦攪拌接合(FSW)継手の疲労強度評価を実施している.同接合は他の接合方法に比べ,添加材が不要であることや異なる材料同士の接合も可能であることなどの多くの利点があり,中でも特性上溶接が難しいアルミニウム合金の接合に適している.そのため,自動車産業などでは,車体の軽量化に向け,アルミニウム合金,そして摩擦攪拌接合のさらなる導入に力を入れている.そこで本研究では,A5052の重ね合わせ摩擦攪拌接合継手の疲労強度評価として,EBSD解析,ビッカース硬さ,静的引張試験,疲労試験,弾塑性解析を行った.ビッカース硬さを調べたところ,フッキング付近から接合部中心にかけて母材に比べてビッカース硬さが低くなっていることがわかった.静的引張試験では,2回のうち,どちらもRS(ツール進行方向と回転方向が逆)側で破断し,破断の仕方も同様だった.フッキング先端ではなく,先端の少し手前から破断していることがわかった.疲労試験では,0.7kN~0.5kNにかけて急激に疲労寿命がのび,疲労限度は0.5kNとなった.また破断の仕方はRS側で破断するものの,引張試験の場合とは異なりフッキング部先端でき裂が発生し,そのき裂が進展し最終的に延性破壊を呈していることが確認された.また,詳細なSEMによる破面観察では,一方の端から疲労き裂進展が生じ,複数のき裂が合体しながら接合部表面に向かって成長していき最終的に延性破壊を呈する.なお,FEM弾塑性解析では,フッキングを考慮しない理想的なモデルを作成し,変位を指定することによる引張試験の解析を行った.その結果,上板と下板の隙間の先端ではなく,その少し手前でミーゼス応力は最大となることから,そこからき裂が発生すると考えられ,実際の引張試験においても同様の場所から破断していたことから同継手の破断特性が再現可能となった.

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  • High fatigue resistance of adhesive bonded material by using ethanol jet peening process

    Grant number:20K22395  2020.09 - 2022.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Research Activity Start-up

    Arakawa Jinta

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    Grant amount:\2860000 ( Direct expense: \2200000 、 Indirect expense:\660000 )

    In this study, we aimed to improve the adhesive bonding strength associated with the surface treatment of ethanol injection type jet peening, but there were many unknown points regarding the durability strength and fracture mechanism of adhesive joint in the first place, and the fracture mechanism of adhesive joint was examined in relation to this problem.
    As a result, it was found that the fatigue strength of adhesive joints using SPCC material as the base material greatly decreased by applying water immersion. On the other hand, adhesive joints made of SUS material as the base material did not tend to decrease the fatigue strength greatly by water immersion. Therefore, it became clear that the fatigue strength decreased in SPCC adhesive joints due to the decrease in the interface strength associated with water immersion.

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  • ガラス繊維強化を援用した高耐久性能を有するFe-摩擦攪拌点接合継手の開発

    大畑財団研究助成 

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  • ガラス繊維架橋効果による摩擦攪拌線接合(FSW)継手の耐久性能向上

    天田財団助成金(一般助成) 

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  • 微小疲労き裂における連続屈曲のメカニズム解明と異次元な寿命改善技術の確立

    三菱マテリアル株式会社 共同研究助成 

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  • エタノール射出型ジェットピーニングによる薄板金属材料およびCFRPの接着接合強度改善

    サタケ基金助成金 

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  • レーザパターニング表面処理による高耐久性能を実現する接着接合接手の開発

    天田財団助成金(若手助成) 

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  • 持続可能なガラス架橋型レーザ接合継手の開発とその評価

    公益財団法人JFE21世紀財団 

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  • ガラス架橋型-薄板鋼板レーザ接合継手の疲労強度評価

    日本鉄鋼協会研究助成 

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  • Laboratory Work and Practice on Basic Engineering (2024academic year) 1st and 2nd semester  - 火5~8

  • Laboratory Work and Practice on Basic Engineering (2024academic year) 1st and 2nd semester  - 火5~8

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  • Laboratory Work and Practice on Basic Engineering (2023academic year) 1st and 2nd semester  - 火5~8

  • Laboratory Work and Practice on Basic Engineering (2023academic year) 1st and 2nd semester  - 火5~8

  • Research Works for Mechanical and Systems Engineering 1 (2023academic year) Prophase  - その他

  • Research Works for Mechanical and Systems Engineering 2 (2023academic year) Late  - その他

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  • Seminar on Mechanical Engineering 2 (2023academic year) Late  - その他

  • Advanced Study (2023academic year) Other  - その他

  • Laboratory Work and Practice on Basic Engineering (2022academic year) 1st and 2nd semester  - 火5~8

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