Matsuda Shoichi

写真a

Title

Associate Professor

Researcher Number(JSPS Kakenhi)

90390567

Current Affiliation Organization 【 display / non-display

  • Duty   University of the Ryukyus   Faculty of Engineering   School of Engineering_Energy and Environment Program   Associate Professor  

Academic degree 【 display / non-display

  •  -  Doctor of Engineering

Research Areas 【 display / non-display

  • Nanotechnology/Materials / Material processing and microstructure control

  • Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Thermal engineering

Research Theme 【 display / non-display

  • Study on Impingement Heat Transfer

Published Papers 【 display / non-display

  • Study on penetration control of the arc welding using external magnetic field– Influence of external magnetic field on arc shape and heat input– 

    Shoichi MATSUDA Manabu TANAKA and Yasushi TANAHARA

    Proceedings of the Visual-JW 2019 and WSE 2019 ( Joining and Welding Research Institute Osaka University )    2019.11 [ Peer Review Accepted ]

    Type of publication: Research paper (international conference proceedings)

  • One-dimensional Ablation Analysis of Lightweight CFRP Ablators with Coking

    KATO Sumio, MATSUDA Shoichi, SHIMADA Naoyuki, SAKAI Shunsuke, OKUYAMA Keiichi, SZASZ Bianca, SHIMODA Takayuki

    TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN ( 日本航空宇宙学会 )  17 ( 4 ) 461 - 470   2019

    Type of publication: Research paper (scientific journal)

     View Summary

    <p>The coking phenomenon within a lightweight carbon-phenolic ablator exposed to the heating environment of air is investigated. The existing one-dimensional charring ablation analysis code is modified so that the coking behavior of the ablator can be calculated as well as the thermal response behavior within a lightweight carbon-phenolic ablator. The mass conservation equations for a pyrolysis gas and carbon in the gas are given. The energy equation including the coking process is also presented. The measured density distributions of some arc-heated CFRP ablator samples are compared with those calculated by the ablation analysis code, from which good agreement is obtained. The density profiles with and without coking are compared. The effect of temperature dependency of carbon mass fraction in a pyrolysis gas in the coking equation upon the density profile is examined. The effect of heating rate upon the density distribution in an ablator is also examined. The effect of coking upon the surface recession is studied analytically and experimentally.</p>

  • Arc Welding Penetration Control utilizing Electromagnetic Controlled Molten Pool Welding

    TOMOHIRO Nakayama, MATSUDA Shoichi, TANAHARA Yasushi

    The Proceedings of Conference of Kyushu Branch ( The Japan Society of Mechanical Engineers )  2019 ( 0 )   2019

    Type of publication: Research paper (other science council materials etc.)

     View Summary

    <p>TIG welding is one of the welding methods widely used in industries for high reliability of joints, little occurrence of spattering and high convenience of construction. However, compared with other arc welding methods, there is a disadvantage that depth of penetration is sallow. To solve this problem, the authors propose a new ECMP (Electromagnetic Controlled Molten Pool Welding Process) method which controls the molten metal flow by using electromagnetic forces generated in the molten pool by a magnetic field perpendicular to the unidirectional current.</p><p>Incidentally, although the conventional ECMP method has mostly prevented the molten metal from sagging downward by using an upward electromagnetic force, the authors propose the use of a downward electromagnetic force in this study. When the direction of the magnetic field is reversed from the conventional method, in principle it is possible to obtain a downward electromagnetic force in the direction of gravity. Utilizing the downward electromagnetic force, improvement of the weld penetration in the TIG welding process of thick plates can be anticipated.</p><p>In this paper, the authors describe in detail their investigation of the influence of the generated downward electromagnetic force on the molten pool flow, the molten pool surface temperature, and the final bead shape when using the new ECMP method which forcefully uses such a downward electromagnetic force.</p>

  • Study on penetration control of the arc welding using external magnetic field Influence of external magnetic field on arc shape and heat input

    MATSUDA Shoichi, TANAHARA Yasushi, TANAKA Manabu

    Preprints of the National Meeting of JWS ( JAPAN WELDING SOCIETY )  2019 ( 0 ) 136 - 137   2019

    Type of publication: Research paper (research society, symposium materials, etc.)

  • Study on penetration control of the arc welding using external magnetic field

    ③ Shoichi Matsuda,Manabu Tanaka,Yasushi Tanahara,Tomohiro Nakayama

    The Symposium of Thailand Welding and Inspection Technology 2018 (TWIT 2018) ( Mahidol University )    2018.11 [ Peer Review Accepted ]

    Type of publication: Research paper (international conference proceedings)

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Other Papers 【 display / non-display

Presentations 【 display / non-display

  • Study on high quality and high efficiency GMA welding using external magnetic field Influence of alternative magnetic field on arc shape and bead shape

    MATSUDA Shoichi, TANAHARA Yasushi and TANAKA Manabu

    Japan Welding Society, Autumn Meeting  (on line)  2021.09  -  2021.09 

  • Influence of External Magnetic Field in Helium Gas Tungsten Arc Welding on Molten Metal Flow and Bead Shape

    MATSUDA Shoichi, TANAHARA Yasushi and TANAKA Manabu

    The Iron and Steel Institute of Japan, Autumn Meeting  (on line)  2021.09  -  2021.09 

  • Study on ocean thermal energy and effective utilization of deep seawater in Okinawa (Heat transfer characteristics of Fan Coil Unit)

    Shoichi MATSUDA and Hirofumi ARIMA

    Ocean Energy Symposium  (on line)  2020.09  -  2020.09 

  • Study of heat transfer characteristics from impinging jet with small diameter circular orifice nozzle at low Reynolds number

    Shoichi MATSUDA, Sumio KATOU and Takamitsu AKIBA

    The Japan Society of Mechanical Engineers,annual meeting  (on line)  2020.09  -  2020.09 

  • Study on high quality and high efficiency GMA welding using external magnetic field-Influence of external magnetic field on arc shape and bead shape

    MATSUDA Shoichi, TANAHARA Yasushi and TANAKA Manabu

    Japan Welding Society, Autumn Meeting  (on line)  2020.09  -  2020.09 

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SDGs 【 display / non-display

  • 海洋温度差および深層水利用の研究