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Yoshimura Hidenori

  • Faculty of Engineering and Design
  • Department of Engineering and Design
  • Graduate School of Science for Creative Emergence
  • Division of Science for Creative Emergence
  • Associate Professor
Last Updated :2026/09/05

Researcher Information

Degree

  • 修士(工学)（Osaka University）
  • Doctor (Engineering)（Osaka University）

J-Global ID

Research Interests

  • Estimation of material property   Numerical simulation   塑性加工   

Research Areas

  • Manufacturing technology (mechanical, electrical/electronic, chemical engineering) / Manufacturing and production engineering

Academic & Professional Experience

  • 2018/04 - Today  Kagawa UniversityFaculty of Engineering and DesignAssociate Professor
  • 2006/04 - 2018/03  Kagawa UniversityFaculty of EngineeringAssociate Professor
  • 2000 - 2005  Kagawa UniversityFaculty of Engineering
  • 1999 - 2000  Osaka UniversityFaculty of Language and Culture

Education

  • 1996/04 - 1999/03  Osaka University  Graduate School of Engineering Science  Department of mechanical engineering
  • 1994/04 - 1996/03  Osaka University  Graduate School of Engineering Science  Department of Mechanical Engineering
  • 1990/04 - 1994/03  Osaka University  Faculty of Engineering Science  Department of Mechanical Engineering

Association Memberships

  • 軽金属学会   日本鉄鋼協会   日本機械学会   日本塑性加工学会   

Published Papers

Conference Activities & Talks

  • 金属管の単純ねじり試験による変形抵抗の取得方法  [Not invited]
    佐栁 宗士朗; 吉村 英徳; 高橋 洋一
    2026年塑性加工春季講演会  2026/03  静岡大学  （一社）日本塑性加工学会
     
    金属管の円周方向に溝を与えてその部分のみを捩じり，トルクとねじれ角から，Swift則による変形抵抗を取得する方法について報告した．
  • 両面ラミネート紙の切断挙動  [Not invited]
    吉村英徳; 松下幸太
    日本塑性加工学会中国・四国支部 第２回支部講演会  2025/12  鳥取大学  日本塑性加工学会中国・四国支部
  • Effect of Cell Wall Thickness of Lattice-type Metalllic Cellular Structure on Mechanical Properties  [Not invited]
    Hidenori Yoshimura; Kentaro Nishio; Rinsei Ikeda
    13th international Conference on Porous Metals and Metallic Foams  2025/09  Waseda University 
    自動車等の軽量・高衝撃吸収性のためのポーラス金属材料として，板材の板金加工によって製作した新セル構造体を提案した．
  • 板材単純せん断を用いたアルミニウム合金の中高温変形抵抗取得のための試験法  [Not invited]
    吉村英徳; 石原雅章; 伊藤勉; 上森武; 高橋洋一; 佐栁宗士朗
    軽金属学会第148回春期大会  2025/05  北九州国際会議場（北九州市）  軽金属学会
     
    軽金属学会の中・高温域におけるアルミ合金の変形解析の高精度化に関する研究部会での高音域の変形抵抗を取得する方法として，板材の単純せん断試験を用いた方法を検討し，またA6063材の試験を行った結果について報告した。
  • 延性材料で被覆された紙材料の型抜き切断挙動の調査ー第2報 切断荷重ー  [Not invited]
    茂中遥; 松下幸太; 吉村英徳; 熱田俊文; 中條明人; 葛原圭祐
    2025年度塑性加工春季講演会  2025/05  あくりえ姫路（姫路市）  日本塑性加工学会
     
    両面ラミネート紙の切断挙動解明として，切断荷重の変動曲線から切断終了の時点を検討し，それの結果から単位刃先線長さあたりの切断荷重を求めた．
  • 突合せ摩擦攪拌点接合の薄板ステンレス鋼への適用について  [Not invited]
    新名楓; 熱田俊文; 吉村英徳
    第73回塑性加工連合講演会講演論文集  2022/11
  • 格子状ポーラス金属材料の製造法および機械特性  [Not invited]
    西尾健太郎; 吉村英徳
    第73回塑性加工連合講演会講演論文集  2022/11
  • ねじりせん断を付加した金属管の新切断法における最大トルクの評価  [Not invited]
    吉村英徳; 高橋洋一
    日本鉄鋼協会第184回秋季大会  2022/09
  • 剛性の低い被削材の旋削における平行板ばね構造シャンクによるびびり振動抑制  [Not invited]
    熱田俊文; 吉村英徳; 松村隆
    2022年度精密工学会秋季大会学術講演会  2022/09
  • 肌焼鋼浸炭時の旧オーステナイト粒異常成長機構の解明  [Invited]
    吉村英徳
    第154回日本鉄鋼協会圧延理論部会  2022/06
  • 超軽量格子状ポーラス金属材料の圧縮特性  [Not invited]
    吉村英徳
    日本塑性加工学会第71回塑性加工連合講演会  2020/11
  • タコ焼きプレート形MHS成形体の開発  [Not invited]
    H29年度塑性加工春季講演会  2017
  • 多孔質体力学を用いたせん断集中理論によるアルミ板材2軸不可変形の破壊予測  [Not invited]
    H29年度塑性加工春季講演会  2017
  • ミニチュアインクリメンタルフォーミングにおける成形形状測定結果を利用した成形精度の向上  [Not invited]
    H29年度塑性加工春季講演会  2017
  • 鋼管の冷間レデューサ圧延の弾塑性変形挙動解析  [Not invited]
    第68回塑性加工連合講演会  2017
  • 片側バルジによる管の2軸材料試験法  [Not invited]
    平成28年度塑性加工春季講演会  2016
  • 超微細粒ステンレス鋼材のマイクロ塑性加工における変形特性  [Not invited]
    平成28年度塑性加工春季講演会  2016
  • 金属薄板のロータリープレス加工法による新ポーラス金属材料  [Not invited]
    第67回塑正加工連合講演会  2016
  • 薄板オーステナイト系ステンレス鋼の突合せ摩擦撹拌点接合  [Not invited]
    第67回塑正加工連合講演会  2016
  • 貫通式ツールを用いた摩擦撹拌インクリメンタルフォーミング法の開発  [Not invited]
    第67回塑正加工連合講演会  2016
  • 摩擦撹拌インクリメンタルフォーミングを用いた2枚の板材の成形・接合同時加工  [Not invited]
    第67回塑正加工連合講演会  2016
  • 超微細粒鋼ステンレス鋼材のマイクロ塑性加工における変形特性 -集合組織による影響 第2報-  [Not invited]
    第67回塑正加工連合講演会  2016
  • 主せん断ひずみエネルギーに注目した成形限界予測式(第2報 製水圧応力の影響)  [Not invited]
    H27年度塑性加工春季講演会  2015
  • 異周速圧延による鞍反りと簡易シュー成形による小径管の製造方法(第3報 異径圧延による反りの発生メカニズム)  [Not invited]
    H27年度塑性加工春季講演会  2015
  • 多段成形による摩擦攪拌インクリメンタルフォーミングにおける成形限界と成形精度の向上  [Not invited]
    多段成形による摩擦攪拌インクリメンタルフォーミングにおける成形限界と成形精度の向上  2015
  • 薄肉小径管のバルジ加工による超軽量ポーラス金属の開発  [Not invited]
    第132回研究例会  2013
  • Initial load of Kushidango metallic hollow sphere structure under compression  [Not invited]
    METFOAM2013  2013
  • リング引張り試験およびゴムバルジ試験による鋼管の加工性評価  [Not invited]
    鋼管二次加工性評価試験方法とその標準化に関するシンポジウム  2012
  • New fabrication method of ultra light porous metal by using tube bulging  [Not invited]
    TUBEHYDRO2011  2011
  • Estimation of ductile fracture of tube material by ring tensile test  [Not invited]
    TUBEHYDRO2011  2011
  • 通電加熱による中空金属球成形体の固化成形法  [Not invited]
    CELLMAT2010  2010
  • 薄板材からの微細プレス加工による鈴型中空球成形体  [Not invited]
    CELLMAT2010  2010
  • 新ポーラス金属串団子型MHS成形体の圧縮特性  [Not invited]
    CELLMQT2010  2010
  • 金属フォームおよびセル金属の高速圧縮し県  [Not invited]
    CELLMAT2010  2010
  • S0403-1-3 Study on Consolidation of Metallic Hollow Spheres by Electric Heating
    YOSHIMURA Hidenori; MIYOSHI Ryotaro; MIHARA Yutaka
    The proceedings of the JSME annual meeting  2009  The Japan Society of Mechanical Engineers
     
    Metallic hollow spheres (MHS) structure is one of the ultra light porous metals which can reduce car weight and has high rigidity and good energy absorption for collision safety. The conventional fabrication method of a MHS structure is powder metallurgy and the spheres are simultaneously joined during sintering of green balls. However, this method has some problems on the process cost and insertion of the structure into tubular parts. Thus, it is expected that a technology to consolidate in tubular parts MHspheres becomes important. We have already developed the inexpensive spheres by metal working of sheet forming or tube forming and then a consolidation method of the hollow spheres by electric heating is examined now. Because of thin and small spheres, it is not easy to join them. In this research, it is tried to join one string of the hollow spheres and the effect of some electric conditions and pressure between the spheres on the joint strength is experimentally examined.
  • 2561 Effect of Material Property of Metallic Hollow Spheres on Performance of Structures
    Hiura YUUKA; YOSHIMURA Hidenori; SHINAGAWA Kazunari; MIHARA Yutaka
    The proceedings of the JSME annual meeting  2007  The Japan Society of Mechanical Engineers
     
    Metallic hollow sphere structure (MHS structure) is one of ultra-light porous metals. The ultra-light structure has a possibility to save the fuel consumption because car body can be lightened without reducing the rigidity and the performance of absorbing collision energy. The energy absorption of the structure is influenced by the diameter and thickness of the hollow spheres and the material. Since MHS structure is an assembly of the same hollow spheres and comparatively homogeneous, its mechanical properties may be predicted easily from the deformation behaviour of unit cell model by CAE. However, material parameters which are required in the analysis cannot be obtained because of the working history of structures. In this study, the way of obtaining the material parameters from the compression test of a single sphere is proposed.
  • 2755 Bending of ultra-light porous metals
    YOSHIMURA Hidenori; SHINAGAWA Kazunari; SUKEGAWA Yoshihiro; MIHARA Yutaka
    The proceedings of the JSME annual meeting  2006  The Japan Society of Mechanical Engineers
     
    Aluminum foams are an attractive material which can reduce the car weight and can improve the rigidity of a car and the energy absorption in a car collision. In this study, to apply the foams to car-parts like a B-pillar and a bonnet, the bending property of the foams and possibility of the fabrication of car-parts by bending are examined. To improve the bending limit of aluminum foams which have a weak point for the tensile deformation, experiments with a warm working and with various radii of bending jig and FEM analysis of sandwich structures are carried out.
  • Property of Metallic Hollow Sphere Structures made by Adhesive Bond
    YOSHIMURA Hidenori; TAOKA Akira; MRAKAMI Katsuhiko; SUKEGAWA Yoshihiro; SHINAGAWA Kazunari; MIHARA Yutaka
    The proceedings of the JSME annual meeting  2004  The Japan Society of Mechanical Engineers
     
    Metallic hollow sphere structure (MHS structure) is one of ultra-light porous metals. The ultra-light structure has a possibility to save the fuel consumption because car body can be lightened without reducing the rigidity and the performance of absorbing collision energy. Although the structures are made by powder metallargy in the conventional method, we propose a new method, in which MHSs are combined by adhesive bond. This method has advantages over the conventional one because the structures can be easily inserted into the car parts. To apply the structure by the proposed method to the car parts, the mechanical properties of the structure are measured. By compression test it is proved that the energy absorbing charactoristies is very high for the structure in which the MHS is filled in a thin walled pipe (0.1mm).
  • Mechanical characteristics of ultra-light metallic hollow sphere structure
    YOSHIMURA Hidenori; MIHARA Yutaka; MURAKAMI Katsuhiko; SUKEGAWA Yoshihiro
    The proceedings of the JSME annual meeting  2003  The Japan Society of Mechanical Engineers
     
    Metallic hollow sphere structure (MHS structure) is one of ultra-light porous metals. Applying the ultra-light structure to car parts has a possibility to save the fuel consumption because car body can be lightened without reducing the rigidity and the performance of absorbing collision energy. In this research, to estimate the performance of MHS structure, deformation behaviour of single MHS and the structure are examined by carrying out uniaxial compression test and bending test. In the compression test, plateau stress appears for the structure of low density. MHS diameter, shell thickness and carbon content have great influences to the magnitude of plateau stress and the increasing rate of stress with increase of density. In bending test, MHS structure has a weak point for tensile stress.

MISC

  • １． 実機使用後の改良９Cr-1Mo鋼溶接熱影響部再流域のEBSDによるクリープ損傷過程の評価
    中村拓弥; 平田英之; 吉村英徳  四国総合研究所研究期報  (114)  2021/06
  • Wei Jiang; Takuya Miura; Masaaki Otsu; Masato Okada; Ryo Matsumoto; Hidenori Yoshimura; Takayuki Muranaka  Procedia Engineering  207-  789  -794  2017  [Refereed]
  • J0330303 Sintering Behavior of Metallic Hollow Sphere Compacts under Partial Uniaxial Pressure
    SHINAGAWA Kazunari; YOSHIMURA Hidenori; MIHARA Yutaka  Mechanical Engineering Congress, Japan  2015-  "J0330303  -1"-"J0330303-3"  2015/09
  • J0300103 Mechanical properties of ball chain type metallic hollow sphere structure
    吉村 英徳; 三原 豊; 品川 一成; 前田 郁真  Mechanical Engineering Congress, Japan  2015-  "J0330103  -1"-"J0330103-4"  2015/09
  • J0320605 Mechanical Properties of Ball Chain type Metallic Hollow Sphere Structure
    YOSHIMURA Hidenori; MIHARA Yutaka; SHINAGAWA Kazunari; AKITA Megumi  Mechanical Engineering Congress, Japan  2014-  "J0320605  -1"-"J0320605-4"  2014/09
  • 吉村英徳  Journal of the JSTP  55-  (637)  117  -124  2014/02
  • Applicability of Mechanical Property of Steel Tubes by Ring Tensile Test
    吉村 英徳; 三原 豊  材料とプロセス 日本鉄鋼協会 編  26-  (2)  611  -614  2013/09
  • Porous Materials Research Committee  Journal of the JSTP  54-  (631)  734  -738  2013/08  [Refereed]
  • Study on applicability of ultra light porous metals to automobile parts for high rigidity and high impact energy absorption
    吉村英徳; 三原 豊; 品川 一成; 鮏川 佳弘  JARI research journal  33-  (4)  17  -21  2011
  • YOSHIMURA Hidenori  Journal of the JSTP  52-  (601)  227  -231  2011
  • Mechanism of austenite grain coarsening in case hardening steel during carburizing
    吉村英徳; 三原豊; 岡内一弘; 笠井正之; 丸田慶一; 木村秀途  JFE giho  23-  (23)  30  -35  2009
  • YOSHIMURA Hidenori  Bulletin of the Japan Institute of Metals  47-  (4)  186  -190  2008
  • Effects of Sphere Size and Material on Performance of Metallic Hollow Sphere Structure
    吉村英徳; 三原 豊; 品川 一成  Cellular Metals for Structure and Functional Applications（Cellmet2008)  173  -178  2008
  • New Porous Metal with High Bending Stength -Tubular Structure wth String ofMetallic Hollow Spheres-
    吉村英徳; 石川 達也; 三原 豊  Cellular Metals for Structure and Functional Applicaions（CELLMET2008）  258  -264  2008
  • 425 The research of manufacturing of metallic hollow spheres for ultra-light porous material
    宅島祐太; 吉村 英徳; 三原 豊  Materials and processing conference  289  -290  2007
  • Ti 系超塑性合金製マイクロ金型の製造法
    吉村英徳  日本機械学会機械材料・材料加工部門ニュースレター  (34)  6  -8  2007
  • 中空金属(MHS)の圧縮特性とその利用方法(第2報)接着構造のMHS (特集 衝突安全)
    鮭川 佳弘; 村上 勝彦; 吉村 英徳  自動車研究  28-  (6)  209  -212  2006/06
  • SHINAGAWA Kazunari; YOSHIMURA Hidenori; MIHARA Yutaka; SUKEGAWA Yoshihiro; MURAKAMI Katuhiko  塑性と加工  47-  (543)  328  -332  2006
  • SHINAGAWA Kazunari; YOSHIMURA Hidenori; MIHARA Yutaka; SUKEGAWA Yoshihiro; MURAKAMI Katsuhiko  塑性と加工  47-  (543)  323  -327  2006
  • Pressure Sintering of Metallic Hollow Sphere Compacts: Experiment and Simulation
    Porous Metals and Metal Foaming Technology  375  -380  2006
  • Pressure Sintering of Metallic Hollow Sphere Compacts: Experiment and Simulation
    品川 一成; 吉村英徳; 三原豊; Y. Sukegawa; K. Murakami  Porous Metals and Metal Foaming Technology  375  -380  2006
  • SHINAGAWA Kazunari; YOSHIMURA Hidenori; MIHARA Yutaka; SUKEGAWA Yoshihiro; MURAKAMI Katsuhiko  Journal of the JSTP  47-  (543)  323  -327  2006
  • SHINAGAWA Kazunari; YOSHIMURA Hidenori; MIHARA Yutaka; SUKEGAWA Yoshihiro; MURAKAMI Katuhiko  Journal of the JSTP  47-  (543)  328  -332  2006
  • Mihara Lab. in Kagawa University
    MIHARA Yutaka; YOSHIMURA Hidenori  塑性と加工 = JOURNAL OF THE JAPAN SOCIETY FOR TECHNOLOGY OF PLASTICITY  46-  (536)  840  -841  2005/09
  • Metallic Hollow Sphere Structure Bonded by Adhesion
    吉村英徳; 品川 一成; 三原 豊; 鮭川 佳弘; 村上 勝彦  Porous Metals and Metal Foaming Technology  381-386  2005/08  [Refereed]
  • FEM simulation of rubber bulge processing of steel tube
    YOSHIMURA Hidenori  材料とプロセス : 日本鉄鋼協会講演論文集 = Current advances in materials and processes : report of the ISIJ meeting  18-  (2)  415  -415  2005/03
  • Producing method of metallic hollow sphere by precision press forming from sheet metal
    YOSHIMURA Hidenori  材料とプロセス : 日本鉄鋼協会講演論文集 = Current advances in materials and processes : report of the ISIJ meeting  18-  (2)  410  -410  2005/03
  • 日本機械学会論文集（A）、71,75,(2005-5),796-802  71-  (705)  796  -802  2005
  • YOSHIMURA Hidenori; SHINAGAWA Kazunari; MURAKAMI Katsuhiko; SUKEGAWA Yoshihiro; HARADA Masahiro; MIHARA Yutaka  日本機械学会論文集A編  71-  (705)  796  -802  2005
  • 三原 豊; 吉村英徳; 品川一成; 村上勝彦; 鮏川佳弘; 原田正裕  日本機械学会論文集（A）、71,75,(2005-5),796-802  71-  (705)  796  -802  2005
  • 接着固化による金属中空球成形体製造法
    吉村英徳; 品川 一成; 三原 豊; 鮭川 佳弘; 村上 勝彦  381  -386  2005
  • YOSHIMURA Hidenori; SHINAGAWA Kazunari; MURAKAMI Katsuhiko; SUKEGAWA Yoshihiro; HARADA Masahiro; MIHARA Yutaka  Transactions of the Japan Society of Mechanical Engineers Series B  71-  (705)  796  -802  2005
  • ポーラス金属を充填したハット部材の曲げ特性 (交通事故分析/衝突安全特集)
    〔スケ〕川 佳弘; 村上 勝彦; 吉村 英徳  自動車研究  26-  (10)  575  -578  2004/10
  • Processability evaluation of the steel pipe for tube forming by rubber bulge processing
    TANAKA Takamasa  材料とプロセス : 日本鉄鋼協会講演論文集 = Current advances in materials and processes : report of the ISIJ meeting  17-  (5)  1056  -1056  2004/09
  • Ring tensile test for estimating workability of steel pipe
    YOSHIMURA Hidenori  材料とプロセス : 日本鉄鋼協会講演論文集 = Current advances in materials and processes : report of the ISIJ meeting  17-  (5)  1055  -1055  2004/09
  • Compressive behavior of iron hollow sphere at elevated temperature
    SHINAGAWA Kazunari  材料とプロセス : 日本鉄鋼協会講演論文集 = Current advances in materials and processes : report of the ISIJ meeting  17-  (5)  1077  -1077  2004/09
  • Evaluation of tube material properties by using the flattening test
    HINO Akitoshi  材料とプロセス : 日本鉄鋼協会講演論文集 = Current advances in materials and processes : report of the ISIJ meeting  17-  (5)  1057  -1057  2004/09
  • DEVELOPMENT OF MICROGRIPPER FOR MEASUREMENT OF ADHESIVE FORCE
    矢木 実; 吉村 英徳; 石丸 伊知郎; 大平 文和; 橋口 原; 三原豊  Conference on Information, Intelligence and Precision Equipment : IIP  2004-  135  -140  2004/03
  • Sintering simulation of metallic hollow spheres
    SHINAGAWA Kazunari  CAMP-ISIJ  16-  (5)  1239  -1239  2003/09
  • フォトリソ技術と多機能皮膜を用いたマイクロ金型製造法 (第8回知能メカトロニクスワークショップ講演論文集) -- (S1. MEMS(1))
    方山 智之; 三原 豊; 吉村 英徳  知能メカトロニクスワークショップ講演論文集  8-  12  -17  2003/08
  • FE simulation of compression test for aluminium foam
    YOSHIMURA Hidenori  材料とプロセス : 日本鉄鋼協会講演論文集 = Current advances in materials and processes : report of the ISIJ meeting  16-  (2)  438  -438  2003/03
  • 3-D FEM analysis for endless stretch reducing of seamless pipe
    YOSHIMURA Hidenori  材料とプロセス : 日本鉄鋼協会講演論文集 = Current advances in materials and processes : report of the ISIJ meeting  15-  (5)  985  -985  2002/09
  • 入門講座 圧延理論入門(8)管材圧延解析のための3次元圧延理論
    三原 豊; 吉村 英徳  ふぇらむ  7-  (11)  42  -47  2002
  • Treatment of boundary conditions in 3-D rigid-plastic finite element method using diagonal matrix
    H Yoshimura; K Osakada; K Mori  SIMULATION OF MATERIALS PROCESSING: THEORY, METHODS AND APPLICATIONS  239  -244  1998
  • 3-D Rigid-Plastic Finite Element Method Using Diagonal Matrix
    MORI Ken-ichiro  材料とプロセス : 日本鉄鋼協会講演論文集 = Current advances in materials and processes : report of the ISIJ meeting  10-  (2)  296  -299  1997/03
  • 3-D Rigid-Plastic Finite Element Method Using Diagoanal Matrix
    Proceeding of COMPLAS V(Proceeding of 5th International Conference on Computational Plasticity)  1-  589  -594  1997

Industrial Property Rights

  • 衝撃吸収用の鈴形中空金属球および衝撃吸収用構造材
    登録番号:4742375
  • マイクロ部品用金型の製造方法
    登録番号:4098044
  • 中空構造体およびその製造方法
    登録番号:4359702
  • マイクロ部品用金型およびその製造方法
    登録番号:46688075号
  • マイクロニードルおよびその製造方法と金型
    登録番号:4779084

Awards & Honors

  • 2026/06 日本塑性加工学会 論文賞
     ねじりによる金属円管のせん断切断法の開発 
    受賞者: 吉村英徳;高橋洋一;大津雅亮
  • 2019 日本塑性加工学会チューブフォーミング分科会 best paper award
     One-sided rubber bulging test to measure forming limit strains of metal tube 
    受賞者: 中原花奈;吉村英徳
  • 2016 日本塑性加工学会賞学生奨励賞
     JPN
  • 2015 日本塑性加工学会優秀論文講演奨励賞
     JPN
  • 2012 日本塑性加工学会学生奨励賞
     JPN
  • 2011 Tubehydro 2011 Best Paper award
  • 2009 日本塑性加工学会学生奨励賞
     JPN
  • 2006 日本塑性加工学会新進賞
     JPN
  • 1996 Japan Society for Technology of Plasticity, Student Encouragement Award (1996.3)
  • 1996 塑性加工学会学生奨励賞
     JPN

Research Grants & Projects

  • Development of egg-tray type metallic hollow sphere structure
    Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research
    Date (from‐to) : 2016/04 -2019/03 
    Author : Hidenori Yoshimura
     
    To develop a new ultra-light porous metal which can be mass-produced inexpensively, egg tray type metallic hollow sphere structure was proposed. First, the fabrication method was examined. Thin steel plates are formed to TAKOYAKI plate shape by drawing, two plate was joined by resin bond the plates to be an egg tray shaped component, and the components are piled up and joined by resin bond to make the new porous metal. Using the plastic working with precise dies, the porous metal is very homogeneous and reliable about the performance. Mechanical properties of the fabricated specimen is tested. As compressive property of the specimen, with the increasing amount of the semi-spherical bulging, the plateau stress region becomes large by 70%. So, it is confirmed that the new porous metal has a good compressive property.
  • Development of rotary pressing for ball-chain type MHS and mechanical property test of the structure
    Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research
    Date (from‐to) : 2013/04 -2016/03 
    Author : Yoshimura Hidenori
     
    In order to reduce weight of cars and improve the rigidity and the collision safety, as a material technique, a new ultra-light porous metal has been developed. The conventional porous metals like foamed aluminum or metallic hollow sphere (MHS) structure have some problems on the process cost, homogeneity and controllability of material and tensile and bending strength. So, we proposed a ball-chain type MHS structure to solve them. Since the hollow spheres used in this structure are precisely and inexpensively mass-produced by metal sheet forming using a punch and die, the structure is very homogenous and the production cost is lower. By changing the dimensions of a punch and a die and metal sheet thickness, size of hollow spheres can be easily changed to be able to control the performance widely. The spheres are point-connected in the conventional MHS structure, while the proposed spheres are strongly connected by a wide bridge and the tensile and bending strengths are also high.
  • Establishment of new forming method of heavy gauge small pipe used continuous shoe forming with saddle-curvature preforming
    Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research
    Date (from‐to) : 2013/04 -2016/03 
    Author : Nagamachi Takuo; YOSHIMURA Hidenori
     
    To manufacture small diameter steel pipes cheaply and simply, it was suggested that continuous shoe forming with saddle-curvature preforming. In order to form saddle-curvature surface, sheet metal warped longitudinally is required. Therefore, forming of the curved sheet by asymmetrical rolling was tried. Effects of rolling reduction of asymmetric rolling on warped curvature were investigated. The longitudinal curvature of formed sheet was periodically fluctuated with the increase in the rolling reduction. This phenomenon was explained based on the assumption that large plastic deformation which occurred at contact starting position with smaller roll propagates along slip line. When making straight the sheet which caused large longitudinal curve, a large curve occurs in width direction. This large curve in width direction is effective in continuous shoe forming.
  • Development of Die Free Double Side Forming Method of Sheet Metal Utilizing Friction
    Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research
    Date (from‐to) : 2013/04 -2016/03 
    Author : Otsu Masaaki; YOSHIMURA Hidenori; MURANAKA Takayuki; MATSUMOTO Ryo; OKADA Masato
     
    Original forming machine for double sides simultaneous forming by friction stir incremental forming with 8 axes (upper and lower forming parts which each set consist of XYZ 3 axes and 1 spindle) was developed. A5052 aluminum alloy sheets were formed by the developed equipment. Convex-concave shape was formed from only single side and double side. Forming accuracy from double side was higher than that from single side. Concave shape was formed from both single side and double side and forming limit and forming accuracy were compared. Forming limit by both methods were same, however, forming accuracy by double side forming was significantly higher than that by single side forming.
  • チェーン状鈴形中空金属球による新超軽量ポーラス金属成形体の開発
    科学技術振興機構：
    Date (from‐to) : 2012 -2013 
    Author : 吉村 英徳
     
    自動車等輸送機器において、CO2排出量削減・燃費向上のためのボディの軽量化と、衝突安全性向上のための重量増加の相反する課題を解決するには、部材の高比剛性、高比衝突エネルギー吸収性の向上が必須であり、その材料技術の一つに超軽量ポーラス金属がある。しかし、従来のポーラス金属はコストや性能面で実用化にまだ問題があり、これらを解決するため、安価な薄板材を使用し、分断されることなく等間隔に繋がった鈴形中空球を大量生産し、それを固化成形して安価、均質に作製することを提案した。試作を行って、圧縮および曲げの機械特性試験を実施し、配列方法に課題はあるものの、予想した性能を付与できることは証明された。今後、配列変化による性能評価・向上を図った後、モデル部材の試作に移行する。
  • Improvement of performance of Kushidango-shape MHS structure
    Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research
    Date (from‐to) : 2010 -2012 
    Author : YOSHIMURA Hidenori
     
    Control method of a new high energy absorbing ultra light porous metal called ‘Kushidango-shape MHS structure’was examined. Kushidango-shape MHS is a tubular component in the shape of a string of hollow spheres. Consolidation method thatthe components are strongly brazed by tin solder at low temperature without heat affect was proposed. The structures in which arrangements of the components ,that is, apparent density and internal deformation behavior were changed were consolidated and theirmechanical properties were estimated by compression and bending tests. By these results, the performance can be controlled. To estimate the performance virtually, FEM simulation models of compression and bending were also established.
  • Development of Friction Stir Incremental Forming Method for Forming Sheet Metals
    Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research
    Date (from‐to) : 2010 -2012 
    Author : OTSU Masaaki; YOSHIMURA Hidenori; TAKASHIMA Kazuki; MATSUDA Mitsuhiro; KITAHARA Hiromoto
     
    Friction stir incremental forming method and forming equipment were developed which process is used for forming sheet metals without dies. AZ31, AZ61 and AZ80 magnesium alloy sheets, A5052 and A2017 aluminum alloy sheets and pure titanium sheets which are hard to deform at room temperature were formed by the developed method. Computational simulation about this forming process was also carried out.
  • 経皮投薬デバイス等の微細金型製造のためのマイクロテーパー微細孔の加工技術
    科学技術振興機構：
    Date (from‐to) : 2011 -2011 
    Author : 吉村 英徳
     
    経皮投薬用の剣山状微小中実針を樹脂のインプリントもしくは射出成形によって製造するための金型について、安価かつ大量に製作するための技術を検討した。穿刺性の良いテーパー状の針とし、樹脂成形金型への圧力を低減するため、針の輪郭となる金型の孔はテーパー状の貫通孔としており、この孔形状を容易に作り込む。約1mm厚のステンレス金属板材に直径0.1mm～0.15mmのドリルにて7～8倍の高アスペクト比の貫通穴をあけた後、高硬度工具鋼SKD材のパンチ型を用いて片側開口部を塞いだり、孔をテーパー状などの形状に成形した。貫通孔裏側に樹脂が漏れないよう、閉口化された片側開口部直径30μm以下、閉口化部近傍テーパー角度の制御ができる方法を開発した。
  • Research on three dimensional wiring by 3-D patterning and vertical shape forming technologies.
    Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research
    Date (from‐to) : 2008 -2010 
    Author : OOHIRA Fumikazu; SASAKI Minoru; MIHARA Yutaka; YOSIMURA Hidenori
     
    The spray coating and inclined UV light exposure technologies were examined to realize the three dimensional wiring pattern. Also, electroplating condition was examined to form the wiring. The technologies were applied to the Chip on Glass optical module. The resistance of the wiring is 0.1～0.2Ω, and also reliability was good. As the result, these technologies can be applicable to the three dimensional wiring. Further, the high aspect ratio vertical Si shape could be formed by the unisotropic wet etching.
  • Development of a new ultra light porous material bundling strings of metallic hollow sphere having high performance of compressive and bending energy absorption
    Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research
    Date (from‐to) : 2006 -2008 
    Author : YOSHIMURA Hidenori
     
    小径極薄の金属管からバルジ加工することによって高精度の串団子状の金属中空体を作り,それを積層・固化成形することによって均質な高信頼性超軽量ポーラス金属を安価かつ大量に製造する技術を開発した.また,作られた成形体の圧縮や曲げ試験を実施して機械特性を調査し,自動車の軽量化,高剛性,高衝突エネルギー吸収性を有することを確認し,製造面・性能面の両面から粉末冶金法等従来法に比べ大きく実用化に貢献した.
  • 衝突エネルギー吸収材としての中空金属球の新しい製造法
    科学技術振興機構：
    Date (from‐to) : 2007 -2007 
    Author : 吉村 英徳
     
    温室効果ガスCO2の排出量削減のため,自動車の軽量化による燃費向上が図られている.一方で,車体重量増加を伴う衝突安全部品の適用も求められており,軽量化は容易でない.この課題を解決するための新材料技術として,近年,超軽量,高非剛性,高エネルギー吸収特性を有する超軽量ポーラス金属材料が注目されている.しかしながら,性能やコスト面においてまだ実用化レベルにない.大量生産性に適した塑性加工技術を用いて,超軽量ポーラス金属の一種である中空金属球(MHS)成形体の新しい製造方法を開発し,薄肉パイプ材から高信頼性かつ安価な材料を製造する.
  • Research on the Evaluation Method and Data Analysis of the Fatigue Strength of the Micro Materials
    Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research
    Date (from‐to) : 2004 -2006 
    Author : MIHARA Yutaka; OOHIRA Fumikazu; HIRATA Hideyuki; HASHIGUCHI Gen; YOSHIMURA Hidenori; HOSOGI Maho
     
    In order to design the MEMS having good reliability, it is necessary to know the mechanical properties such as strength, fracture toughness and fatigue strength of micro components. The fatigue testing machine for the micro specimen was developed in this research. The fatigue testing machine and each specimen are made of single crystal silicon. And they were made by using the micro fabrication technology being based on the silicon semiconductor processing technology. The examination of the fast fracture strength against the several kinds of specimens which dimensions were different each other was carried out by using that fatigue testing machine. And the fatigue tests were also carried out. Following is the conclusions. 1. Several fatigue testing machine for the micro specimens were successfully made. 2. The driving force of each fatigue testing machine was measured and the correction factor of static electricity force F which occurred in the comb actuator was determined. 3. The precise evaluation of the applying load becomes possible by using the correction factor. 4. The fast fracture strength was evaluated for four kinds of micro specimens being made of single crystal silicon. 5. The distribution of the fast fracture strength was evaluated as the Weibull probabilistic distribution. It was clarified that the volme dependency of the strength could be described by the weakest linkage model. 6. The fatigue strength which is shown by the relationship between the cycles to failure and the amplitude of the cyclic load was obtained against the several kinds of micro specimens. 7. The fatigue strength of the aluminium coated specimens and the titan nitride coated specimens were also obtained.
  • Development of high-functional optical and biological devices by ultra precise micro dies.
    Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research
    Date (from‐to) : 2004 -2006 
    Author : OOHIRA Fumikazu; MIHARA Yutaka; HASHIGUCHI Gen; ISHIMARU Ichirou; OGAWA Kazuhumi; YOSHIMURA Hidenori
     
    This research aims to realize high-functional optical and biological devices using precise micro dies. 1. Precise Micro dies Very precise micro dies have been realized for the optical and biological devices by the newly developed Si 3D shape formation, thin film deposition, and micro electroplating technologies. (1) Micro dies for optical devices ・Micro dies for the AWG (Arrayed Waveguide Grating) device have been designed and fabricated. The mother shape has been fabricated by the Si micro machining, and the shape has been fabricated by using also the SU-8 resist. ・The micro die for the micro lens has been designed and fabricated considering the laser diode. By the electroplating technique, the micro die for the UV cure material has been realized. ・The micro die with the sub-micron size gap pillars has been realized. The high aspect ratio pillar shapes could be transferred by the micro electroplating. (2) Micro dies for biological devices 2. Optical and biological devices The plastic devices were fabricated by using the micro dies mentioned above. (1) Optical devices ・The fabrication processes and conditions such as vacuum were optimized, and the AWG with the core size of 5 microns has been fabricated. ・The feasibility of the mono-molecular layer thin film has been examined for the removal use of the micro dies. ・The optical characteristics of the micro lens has been evaluated. (2) Biological devices ・The insert process has been examined using the nano-inprint technology, and the biological chips have been fabricated with the very narrow gaps between the pillars. As the result, the shape transform of the aspect ratio of about 1 has been realized. As the result, using the technologies developed in this study, the high functional devices could be realized.
  • 極薄・極小中空球を用いた超軽量金属材料の新製造法
    日本学術振興会：科学研究費助成事業
    Date (from‐to) : 2002 -2004 
    Author : 吉村 英徳
     
    自動車の低燃費化によるCO2排出量の削減および衝突安全性の向上のため,軽量かつ高剛性,高エネルギー吸収特性をもつ超軽量多孔質金属材料(中空金属球(MHS)成形体)の新しい製造法について検討した.H16年度では,H15年度に続いてパイプからの転造加工と薄板材からの微細プレスによる製造実験を行った. 1.パイプからの転造加工 3方向の押込み量や3個のロールの回転速度の同期を厳密に取るため,転造加工用の装置を作製し,それを用いて実験を行った.H15年度に引き続いて焼鈍したSUS304において転造加工を行ったが,パイプをつぶすことなく局部的な絞りを促すため,押込み速度に対して回転速度を上げ,成形の逐次性を高めたが,加工性が悪くパイプの曲げ戻しによる破断が防げなかった.成形性の良い銅の0.2mmのパイプを使用して実験を行ったところ,SUS304より加工ができた.完全に球にするには,逐次性形成と材料そのものの成形性が中空球の製造の実現には必要である. 2.内面保持材 パイプの潰れを抑制するため,パイプの内側に保持材を入れることを試みた.内面保持材を用いた方が局部絞りが容易になるが,材料の加工性の問題で軸方向の割れを抑制することはできなかった. 3.転造加工のFEM解析 パイプの肉厚変化や割れ現象を検討するため,市販コードを用いてFEM解析を行った.薄肉材になるほど局部的にひずみが集中し,加工が困難である. 4.薄板材からの微細プレス加工 H15年度では,カプセル状の中空球であったため,引張り時においては半球同士がはがれるため,曲げ試験としては粉末冶金法による一体型のMHSよりも弱い.引張りにはもともと弱いが,多少強度がないと外套材からもれ易く問題である.したがって,一体型の中空球を作るため,鈴形状の中空球を作製した.0.1mmの薄板材であり隙間を少なくするため,ブランク形状,加工工程の検討を行った.
  • Research on Testing Methods for Micro-fatigue strength of Micro-Nano Devices.
    Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research
    Date (from‐to) : 2001 -2003 
    Author : MIHARA Yutaka; HASHIGUCHI Gen; HIRATA Hideyuki; OOHIRA Fumikazu; YOSIMURA Hidenori
     
    Micro-and nano-tecnology will play a very important roll in the field of IT, medical technology, biotechnology and so on as a key technology for a new innovation and social development. Though many researches has been done to build in new functions to micro-and nano-devices, a few fundamental studies on mechanical properties of micro-and nano-material has been done for the reliability of micro devices. The purpose of our researches is (1) to make a testing machine for measuring the mechanical properties of micro-material and micro devices, (2) to collect data of mechanical properties of micro-materials and enable to use the materials with high reliability. As a research of first step, we made a fatigue and strength testing machine in bending using micro-machine fabrication technology of Si single crystal photo lythography. The features of the testing machine are as follows. (1) Measuring and control of very small weight loading can be done by voltage control because a comb type actuator of static electricity is applied. (2) The shape of the loading actuator can be a pair of tweezers which enable the test of fluctuating stress of reverse type. (3) The testing machine and the specimen are separate type, which enable the test of any material. (4) The test can be done in a scanning microscope, which enable the test of micro-and nano-material. The performance of the testing machine is as follows. (1)Loading weight is 0.0005N〜0.005N. (2)Loading deflection is 14 micron. (3)Fluctuating frequency is 10KHz. Using the testing machine fatigue test of Si single crystal of 50μ^W×5μ^T were carried out. 8 specimen were tested in repeated stress cycle with maximum stress 0.0025〜0.005N and the frequency 50He〜3KHz. Specimen were failed after fluctuating number 5×10^5〜9×10^5 without any trouble in testing machine.
  • 多孔質金属の製造法の検討
  • 多孔質金属の機械的特性評価および変形挙動解析
  • 鋼管の2次加工性評価
  • チューブフォーミングによる自動車用部材製造に関する検討
  • マイクロ塑性加工による微小針の製造法

Social Contribution

  • 日本塑性加工学会塑性加工学講座有限要素法入門セミナー
    Date (from-to) : 2007/08-2020/08
    Role : Lecturer
    Category : Seminar
    Sponser, Organizer, Publisher  : 日本塑性加工学会
    講師
  • 日本塑性加工学会校閲委員
    Date (from-to) : 2018/05-2020/04
    Role : Organizing member
    Sponser, Organizer, Publisher  : 日本塑性加工学会校閲委員会
    校閲委員

Academic Contribution

  • 軽金属学会査読
    Date (from-to) :2020-Today
    Role: Peer review
    Type: Academic society etc
    Organizer, responsible person: 軽金属学会
  • 日本鉄鋼協会査読
    Date (from-to) :2019-Today
    Role: Peer review
    Type: Academic society etc
    Organizer, responsible person: 日本鉄鋼協会
  • 日本塑性加工学会査読
    Date (from-to) :2015/05-Today
    Role: Peer review
    Type: Academic society etc
    Organizer, responsible person: 日本塑性加工学会

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