TAKUDA Hirohiko

J-GLOBAL         Last updated: Jun 17, 2019 at 13:39
 
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Name
TAKUDA Hirohiko
Affiliation
Kyoto University
Section
Graduate School of Energy Science, Department of Energy Science and Technology
Job title
Professor
Degree
Doctor of Engineering

Research Interests

 
 

Research Areas

 
 

Published Papers

 
Influence of critical resolved shear stress ratios on the response of a commercially pure titanium oligocrystal: crystal plasticity simulations and experiment
Baudoin, P., Hama, T. and Takuda, H.
International Journal of Plasticity   115 111-131   2019   [Refereed]
Morisawa, K., Nakahara, J., Nagata, K., Fujimoto, H., Hama, T., and Takuda, H.
ISIJ International   58(1) 140-145   Jan 2018   [Refereed]
Fujimoto, H., Sakane, S., Hama, T., and Takuda, H.
Experimental Thermal and Fluid Scence   96 1-10   2018   [Refereed]
Hama, T., Suzuki, T., Hatakeyama, S., Fujimoto, H., and Takuda, H.
Materials Science & Engineering A   725 8-18   2018   [Refereed]
Hama, T., Kojima, K., Kubo, M., Fujimoto, H., and Takuda, H.
ISIJ International   57(5) 866-874   May 2017   [Refereed]
Time-dependent springback of a commercially pure titanium sheet
Hama, T., Sakai, T., Fujisaki, Y., Fujimoto, H., and Takuda, H.
Procedia Engineeing   207 263-268   2017   [Refereed]
Kubo, M., Nakazawa, Y., Hama, T., and Takuda, H.
ISIJ International   57 2185-2193   2017   [Refereed]
Fujimoto, H., Yoshimoto, S., Takahashi, K., Hama, T., and Takuda, H.
Experimental Thermal and Fluid Science   81 136-146   2017   [Refereed]
Hama, T., Kobuki, A., and Takuda, H.
International Journal of Plasticity   91 77-108   2017   [Refereed]
Fujimoto, H., Obana, W., Ashida, M., Hama, T., and Takuda, H.
Experimental Thermal and Fluid Science   85 201-212   2017   [Refereed]
Kubo, M., Nakazawa, Y., Yoshida, H., Yonemura, S., Hama, T., and Takuda, H.
ISIJ International   56(12) 2259-2266   Dec 2016   [Refereed]
Fujimoto, H., Hayashi, N., Nakahara, J., Morisawa, K., Hama, T., and Takuda, H.
ISIJ International   56(11) 2016-2021   Nov 2016   [Refereed]
Kubo, M., Yoshida, H., Uenishi, A., Suzuki, S., Nakazawa, Y., Hama, T., and Takuda, H.
ISIJ International   56(4) 669-677   Apr 2016   [Refereed]
N. Yi, T. Hama, T. Kuboki, H. Fujimoto, H. Takuda
Materials Science & Engineering A   655 70-85   2016   [Refereed]
3) Hama, T., Tanaka, Y., Uratani, M., and Takuda, H.
International Journal of Plasticity,   82 283-304   2016   [Refereed]
Hitoshi Fujimoto, Shohei Watanabe, Takahiko Okamoto, Takayuki Hama, Hirohiko Takuda
Experimental Thermal and Fluid Science   60 66-74   Jan 2015
© 2014 Elsevier Inc. Spray-cooling methods are utilized in quench hardening and throughout the metal-forming industry. Aqueous solutions of water-soluble polymers are the typical quenchant. Although the impact behavior of the droplets has a great ...
T. Hama, R. Matsudai, Y. Kuchinomachi, H. Fujimoto, H. Takuda
ISIJ International   55 1067-1075   2015   [Refereed]
H. Fujimoto, Y. Shiramasa, K. Morisawa, T. Hama, H. Takuda
ISIJ International   55(9) 1994-2001   2015   [Refereed]
Deformation behavior of a magnesium alloy sheet with rondom crystallographic orientations under various loading paths
T. Hama, T. Mayama, H. Takuda
The Romanian Journal of Technical Sciences - Applied Mechanics   60 1-16   2015   [Refereed]
Takayuki Hama, Hirotaka Nagao, Akihiro Kobuki, Hitoshi Fujimoto, Hirohiko Takuda
Materials Science and Engineering A   620 390-398   Dec 2014
© 2014 Elsevier B.V. In this study, the work-hardening and twinning behaviors in a commercially pure titanium sheet were examined under various loading paths including reverse loading. The yield stress was identical between tension and compression...
Hiroaki Kubota, Atsushi Tomizawa, Kenji Yamamoto, Nobuhiro Okada, Takayuki Hama, Hirohiko Takuda
ISIJ International   54 1856-1865   Jan 2014
© 2014 ISIJ. In this study, a coupled thermo-mechanical-metallurgical finite element analysis (FEA) method was developed to investigate the deformation behavior in the three-dimensional hot bending and direct quench processes. In the developed FEA...
Hitoshi Fujimoto, Katsutoshi Tatebe, Yamato Shiramasa, Takayuki Hama, Hirohiko Takuda
ISIJ International   54 1338-1345   Jan 2014
The heat transfer characteristics of a circular water jet impinging on a moving hot solid were investigated experimentally. In the experiments, distilled water at room temperature was used as the test coolant. The circular jet issued from a 5-mm-d...
Takayuki Hama, Hirohiko Takuda
Key Engineering Materials   622-623 603-608   Jan 2014
© (2014) Trans Tech Publications, Switzerland. The objective of this study was to understand the work-hardening behavior of a rolled AZ31 magnesium alloy sheet upon reverse loading. Firstly we carried out an in-plane compression-tension test of a ...
Takayuki Hama, Tsuyoshi Mayama, Hirohiko Takuda
Key Engineering Materials   611-612 27-32   Jan 2014
In the present study, the deformation behavior of a cast Mg alloy sheet that had random crystallographic orientations was studied both experimentally and numerically. Although the crystallographic orientations were random, the stress-strain curve ...
T. Hama; H. Nagao; Y. Kuchinomachi; H. Takuda
Materials Science and Engineering A   591 69-77   2014   [Refereed]
H. Fujimoto; Y. Lee; R. Kato; T. Hama; H. Takuda
ISIJ International   53(8) 1427-1435   2013   [Refereed]
T. Hama; N. Kitamura; H. Takuda
Materials Science and Engineering A   583 232-241   2013   [Refereed]
T. Hama; N. Kitamura; H. Fujimoto; H. Takuda
Key Engineering Materials   554-557 71-76   2013   [Refereed]
T. Hama; Y. Kariyazaki; N. Hosokawa; H. Fujimoto; H. Takuda
Materials Science and Engineering A   551 209-217   Aug 2012   [Refereed]
T. Hama; T. Kitajima; Y. Nishimura; H. Fujimoto; H. Takuda
Materials Transactions   53(5) 826-832   May 2012   [Refereed]
T. Hama; H. Takuda
Computational Materials Science   51(1) 156-164   Jan 2012   [Refereed]
Deformation behavior of high strength steel sheet during roll forming of electric resistance welded pipe
Iguchi, K., Kuriyama, Y., Moroi, N., Hama, T., and Takuda, H.
Steel Research International, Special Edition, (2012), 927-930.      2012   [Refereed]
Crystal plasticity finite-element simulation of deformation behavior in a magnesium alloy sheet considering detwinning
Hama, T., and Takuda, H.
Steel Research International, Special Edition, (2012), 1115-1118.      2012   [Refereed]
H. Fujimoto; R. Doi; H. Takuda
Journal of Fluids Engineering, Transactions of the ASME   134(7)    2012   [Refereed]
T. Hama; H. Takuda
International Journal of Plasticity   27(7) 1072-1092   Jul 2011   [Refereed]
Unloading behaviour of a magnesium alloy sheet under various loading paths
Hama, T., Ochi, K., Kitamura, N., Fujimoto, H., and Takuda, H.
Steel Research International, (2011), Special Edition, 1054-1059.      2011   [Refereed]
H. Fujimoto; Y. Suzuki; T. Hama; H. Takuda
ISIJ International   51(9) 1497-1505   2011   [Refereed]
Experimental Verification of Springback Simulation Using Local Interpolation for Tool Surfaces
Hama, Takayuki; Isogai, Eiji; Yoshida, Tohru; Takuda, Hirohiko
STEEL RESEARCH INTERNATIONAL   81(9) 753-756   Sep 2010   [Refereed]
Finite Element Analysis of Strip Deformation in Roll Forming of Electric Resistance Welded Pipe with Vertical Rolls
Iguchi, Keinosuke; Nishida, Kazuki; Hama, Takayuki; Nakamura, Hideyuki; Kuriyama, Yukihisa; Takuda, Hirohiko
STEEL RESEARCH INTERNATIONAL   81(9) 186-189   Sep 2010   [Refereed]
H. Fujimoto; Y. Oku; T. Ogihara; H. Takuda
International Journal of Multiphase Flow   36(8) 620-642   Aug 2010   [Refereed]
T. Hama; Y. Kariyazaki; K. Ochi; H. Fujimoto; H. Takuda
Materials Transactions   51(4) 685-693   Apr 2010   [Refereed]
H. Fujimoto; M. Kubo; T. Hama; H. Takuda
Advances in Mechanical Engineering   2010    2010   [Refereed]
H. Fujimoto; Y. Oku; T. Ogihara; T. Hama; H. Takuda
Journal of Flow Visualization and Image Processing   17(2) 113-126   2010   [Refereed]
K. Ibuki; T. Umeda; H. Fujimoto; H. Takuda
Experimental Thermal and Fluid Science   33(8) 1226-1234   Nov 2009   [Refereed]
Hirohiko Takuda, Keisuke Ozawa, Takayuki Hama, Tohru Yoshida, Jun Nitta
Materials Transactions   50 1930-1934   Aug 2009
The bore expansion tests of a mild steel sheet and two types of high-strength steel sheets using conical- and flat-headed punches are simulated using the dynamic explicit finite element program LS-DYNA ver. 970 with shell elements. The ductile fra...
H. Takuda; K. Ozawa; T. Hama; T. Yoshida; J. Nitta
Materials Transactions   50(8) 1930-1934   Aug 2009   [Refereed]
Finite element simulation of roll forming of seamwelded pipes in initial three stands
H. Takuda; K. Tsujikawa; T. Hama; K. Iguchi; H. Hishida
Computational Plasticity X - Fundamentals and Applications      2009   [Refereed]
Prediction of forming limit in stretch flanging by finite element simulation combined with ductile fracture criterion
Takuda, H., Hama, T., Nishida, K., Yoshida, T., and Nitta, J.
Computer Methods in Materials Science, 9-1 (2009), 137-142      2009   [Refereed]
T. Hama; K. Matsushima; T. Kitajima; H. Fujimoto; H. Takuda
ISIJ International   49(11) 1736-1743   2009   [Refereed]
T. Hama; K. Kurisu; K. Matsushima; H. Fujimoto; H. Takuda
ISIJ International   49(2) 239-246   2009   [Refereed]
H. Fujimoto; A.Y. Tong; H. Takuda
International Journal of Thermal Sciences   47(3) 229-236   Mar 2008   [Refereed]
T. Hama; T. Nagata; C. Teodosiu; A. Makinouchi; H. Takuda
International Journal of Mechanical Sciences   50(2) 175-192   Feb 2008   [Refereed]
Takayuki Hama, Takayuki Hama, Keinosuke Iguchi, Hirotoshi Hishida, Hirohiko Takuda
Steel Research International   79 587-594   Jan 2008
This paper compares the simulation results of the bending deformation of steel sheets by using various types of finite-element codes. This analysis aims at increasing the accuracy of the forming simulation of high strength steels, by using the mos...
T. Minamikawa; H. Fujimoto; T. Hama; H. Takuda
ISIJ International   48(5) 611-615   2008   [Refereed]
H. Fujimoto; D. Ohno; T. Hama; H. Takuda
ISIJ International   48(5) 603-610   2008   [Refereed]
T. Hama; M. Takamura; A. Makinouchi; C. Teodosiu; H. Takuda
Materials Transactions   49(2) 278-283   2008   [Refereed]
FORMING LIMIT PREDICTION OF HIGH-STRENGTH STEEL SHEETS IN STRETCH FORMING
Takuda, Hirohiko; Hama, Takayuki; Yoshida, Tohru; Nitta, Jun
STEEL RESEARCH INTERNATIONAL   19-23   2008   [Refereed]
Takayuki Hama, Masato Takamura, Cristian Teodosiu, Akitake Makinouchi, Hirohiko Takuda
Key Engineering Materials   340-341 I 743-748   Apr 2007
This paper describes the effect of tool modeling accuracy on the accuracy of springback simulation in sheet metal forming. Simulations of a two-dimensional draw-bending process are carried out by using the polyhedral tool model and the model whose...
H. Fujimoto; Y. Shiotani; A.Y. Tong; T. Hama; H. Takuda
International Journal of Multiphase Flow   33(3) 317-332   Mar 2007   [Refereed]
T. Hama; T. Hatakeyama; M. Asakawa; H. Amino; A. Makinouchi; H. Fujimoto; H. Takuda
Finite Elements in Analysis and Design   43(3) 234-246   Jan 2007   [Refereed]
T. Minamikawa; H. Fujimoto; T. Hama; H. Takuda
ISIJ International   47(1) 131-137   2007   [Refereed]
T. Hama; T. Ohkubo; K. Kurisu; H. Fujimoto; H. Takuda
Journal of Materials Processing Technology   177(1-3) 676-679   Jul 2006   [Refereed]
Hirohiko Takuda, Tomofumi Kanie, Eiji Isogai, Tohru Yoshida
Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan   91 553-559   Jun 2005
In this study, first, the limit strains of a few types of high-strength steel sheets under various strain paths from balanced biaxial stretching to uniaxial tension are examined by the Marciniak-type in-plane biaxial stretching test. They are comp...
H. Fujimoto; A.Y. Tong; Y. Shiotani; H. Takuda
American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED   261 FED 805-811   2005   [Refereed]
H. Fujimoto; T. Nagatani; H. Takuda
International Journal of Multiphase Flow   31(10-11) 1116-1133   2005   [Refereed]
H. Takuda; T. Morishita; T. Kinoshita; N. Shirakawa
Journal of Materials Processing Technology   164-165 1258-1262   2005   [Refereed]
H. Fujimoto; S. Murakami; A. Omura; H. Takuda
International Journal of Heat and Fluid Flow   25(6) 996-1005   Dec 2004   [Refereed]
H. Fujimoto; H. Takuda
International Journal of Heat and Mass Transfer   47(14-16) 3301-3305   Jul 2004   [Refereed]
Application of Ductile Fracture Criterion to Prediction of Forming Limit of High-Strength Steel Sheets
宅田 裕彦
Steel Grips,2, 439-443      2004   [Refereed]
A.Y. Tong; H. Fujimoto; S. Kasliwal; H. Takuda
American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD   375(2) 589-596   2004   [Refereed]
H. Fujimoto; A.Y. Tong; Y. Shiotani; H. Takuda
American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD   375(2) 597-603   2004   [Refereed]
H. Fujimoto; I. Takezaki; Y. Shiotani; A. Tong; H. Takuda
ISIJ International   44(6) 1049-1056   2004   [Refereed]
H. Takuda; K. Mori; T. Masachika; E. Yamazaki; Y. Watanabe
Journal of Materials Processing Technology   143 242-248   Dec 2003   [Refereed]
H. Takuda; S. Kikuchi; N. Yoshida; H. Okahara
Materials Transactions   44(11) 2266-2270   Nov 2003   [Refereed]
H. Fujimoto; S. Ogawa; H. Takuda; N. Hatta
Journal of Energy Resources Technology, Transactions of the ASME   125(1) 17-25   Mar 2003   [Refereed]
Prediction of forming limit of high-strength steel sheets by means of criterion for ductile fracture
H. Takuda
Key Engineering Materials   251-2 1-6   2003   [Refereed]
H. Takuda; K. Mori; I. Masuda; Y. Abe; M. Matsuo
Journal of Materials Processing Technology   120(1-3) 412-418   Jan 2002   [Refereed]
H. Takuda; H. Matsusaka; S. Kikuchi; K. Kubota
Journal of Materials Science   37(1) 51-57   Jan 2002   [Refereed]
H. Fujimoto; T. Ogino; H. Takuda; N. Hatta
International Journal of Multiphase Flow   27(7) 1227-1245   Jul 2001   [Refereed]
H. Fujimoto; T. Ogino; N. Hatta; H. Takuda
ISIJ International   41(5) 454-459   2001   [Refereed]
N. Hatta; M. Omodaka; F. Nakajima; H. Fujimoto; H. Takuda
Steel Research   71(5) 153-160   May 2000   [Refereed]
H. Takuda; T. Enami; K. Kubota; N. Hatta
Journal of Materials Processing Technology   101(1-3) 281-286   Apr 2000   [Refereed]
H. Takuda; K. Mori; N. Takakura; K. Yamaguchi
International Journal of Mechanical Sciences   42(4) 785-798   Apr 2000   [Refereed]
H. Fujimoto; H. Takuda; N. Hatta; R. Viskanta
Numerical Heat Transfer; Part A: Applications   36(8) 767-780   Dec 1999   [Refereed]
Effect of strain rate on deformation behaviour of a Mg-8.5Li-1Zn alloy sheet at room temperature
H. Takuda; S. Kikuchi; T. Tsukada; K. Kubota; N. Hatta
Materials Science and Engineering A   271(1-2) 251-256   Nov 1999   [Refereed]
H. Takuda; K. Mori; N. Hatta
Journal of Materials Processing Technology   95(1-3) 116-121   Oct 1999   [Refereed]
H. Takuda; K. Mori; H. Fujimoto; N. Hatta
Journal of Materials Processing Technology   93 433-438   Aug 1999   [Refereed]
N. Hatta; M. Omodaka; F. Nakajima; T. Takatsu; H. Fujimoto; H. Takuda
Journal of Fluids Engineering, Transactions of the ASME   121(2) 330-342   Jun 1999   [Refereed]
H. Takuda; T. Yoshii; N. Hatta
Journal of Materials Processing Technology   90 135-140   May 1999   [Refereed]
H. Takuda; S. Kikuchi; N. Hatta
Journal of Materials Processing Technology   84(1-3) 117-121   Dec 1998   [Refereed]
H. Takuda, H. Fujimoto, N. Hatta
Journal of Materials Science   33 91-97   Dec 1998
The tensile properties and press formabilities of laminates experimentally produced from mild steel and various aluminium alloy sheets are examined. The tensile properties of the laminates are approximately predictable by the mixture rule of the p...
Hirohiko Takuda, Natsuo Hatta
Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science   29 2829-2834   Dec 1998
A criterion for ductile fracture is applied to the formability prediction of an aluminum 2024 alloy sheet and its laminated composite sheets. Axisymmetric deep-drawing processes of the 2024 sheet and the laminates clad by mild steel sheets are sim...
Hirohiko Takuda, Ken Ichiro Mori, Masashi Kaneshiro, Masashi Kaneshiro, Natsuo Hatta
Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan   84 24-29   Dec 1998
A criterion for ductile fracture is applied to the prediction of forming limit in bore-expanding processes of sheet steels. Axisymmetric bore-expanding tests of mild steel and high strength steel sheets using conical-, hemispherical- and flat -hea...
H. Takuda; N. Hatta
Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science   29(11) 2829-2834   Nov 1998   [Refereed]
H. Takuda; Y. Tanaka; N. Hatta
Archive of Applied Mechanics   68(7-8) 566-576   Sep 1998   [Refereed]
H. Takuda; N. Hatta
Materials Science and Engineering A   242(1-2) 15-21   Feb 1998   [Refereed]
H. Takuda; H. Fujimoto; N. Hatta
Journal of Materials Science   33(1) 91-97   Jan 1998   [Refereed]
H. Takuda; H. Fujimoto; N. Hatta
Journal of Materials Processing Technology   80-81 513-516   1998   [Refereed]
A Simple Approach to Plane Strain Extrusion with Dead Metal Zone Using Upper-bound Theorem
H. Takuda; N. Hatta
Metals and Materials International   4(4) 737-741   1998   [Refereed]
Finite element analysis of formability of a few kinds of special steel sheets
H. Takuda; H. Fujimoto; Y. Kuroda; N. Hatta
Steel Research   68(9) 398-402   Sep 1997   [Refereed]

Misc

 
HAMA TAKAYUKI, URATANI MASATO, TANAKA YUKI, TANAKA TSUTOMU, NISHIMURA TAKASHI, FUJIMOTO HITOSHI, TAKUDA HIROHIKO
塑性加工連合講演会講演論文集   65th 303-304   Sep 2014
HAMA TAKAYUKI, KOBUKI AKIHIRO, NAGAO HIROTAKA, TANAKA TSUTOMU, NISHIMURA TAKASHI, FUJIMOTO HITOSHI, TAKUDA HIROHIKO
塑性加工連合講演会講演論文集   65th 311-312   Sep 2014
KUBOTA HIROAKI, TOMIZAWA ATSUSHI, YAMAMOTO KENJI, OKADA NOBUHIRO, HAMA TAKAYUKI, TAKUDA HIROHIKO
塑性加工連合講演会講演論文集   65th 147-148   Sep 2014
WADA MANABU, WARIZAYA MIWA, HAMA TAKAYUKI, TAKUDA HIROHIKO, KURIYAMA YUKIHISA, HIWATASHI SHUNJI
塑性加工連合講演会講演論文集   65th 161-162   Sep 2014
HAMA TAKAYUKI, TAKUDA HIROHIKO
塑性加工連合講演会講演論文集   65th 305-306   Sep 2014
SHIRAMASA YAMATO, FUJIMOTO HITOSHI, HAMA TAKAYUKI, TAKUDA HIROHIKO
材料とプロセス(CD-ROM)   27(2) ROMBUNNO.197   Sep 2014
HAMA TAKAYUKI, TANAKA YUKI, URATANI MASATO, TANAKA TSUTOMU, NISHIMURA TAKASHI, FUJIMOTO HITOSHI, TAKUDA HIROHIKO
塑性加工春季講演会講演論文集   2014 293-294   May 2014
HAMA TAKAYUKI, MATSUSHIRO RYOGO, KUCHINOMACHI YOTA, FUJIMOTO HITOSHI, TAKUDA HIROHIKO
材料とプロセス(CD-ROM)   27(1) ROMBUNNO.179   Mar 2014
T. Hama; M. Takamura; C. Teodosiu; A. Makinouchi; H. Takuda
AIP Conference Proceedings   778 A 185-190   Aug 2005
Treatment of contact between a sheet and tools is one of the most difficult problems to deal with in finite-element simulations of sheet forming processes. In order to obtain more accurate tool models without increasing the number of elements, thi...
T. Hama; C. Teodosiu; A. Makinouchi; H. Fujimoto; H. Takuda
AIP Conference Proceedings   908 805-810   Aug 2007
This paper presents the effect of tool modelling accuracy on the simulation accuracy of springback in high strength steels. Simulations of a two-dimensional draw-bending process are carried out by using a polyhedral tool model whose surface is app...
H. Fujimoto; S. Dejima; A.Y. Tong; T. Hama; H. Takuda
ASME International Mechanical Engineering Congress and Exposition, Proceedings   8 PART B 1117-1124   May 2008
The present paper is concerned with three-dimensional numerical simulations of hydrodynamics and convective heat transfer of a free surface liquid jet impinging onto a hot substrate. The Navier-Stokes equations for unsteady incompressible viscous ...
OBANA WATARU, FUJIMOTO HITOSHI, HAMA TAKAYUKI, TAKUDA HIROHIKO, OKAMOTO TAKAHIKO
材料とプロセス(CD-ROM)   27(1) ROMBUNNO.151   Mar 2014
T. Hama; H. Fujimoto; H. Takuda
AIP Conference Proceedings   1252 802-809   Sep 2010
Magnesium alloy sheets exhibit strong inelastic response during unloading. In this study crystal plasticity finite element analysis of loading-unloading behaviour during uniaxial tension in a rolled magnesium alloy sheet was carried out, and the m...
H. Fujimoto; R. Doi; T. Ogihara; T. Hama; H. Takuda
ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)   7(PARTS A AND B) 1653-1662   Dec 2010
The oblique collision of single water droplets with a hot Inconel 625 alloy surface has been investigated by means of a two-directional flash photography technique that uses two digital still cameras and three flash units. The experiments were con...
T. Hama; H. Fujimoto; H. Takuda
AIP Conference Proceedings   1383 314-321   Sep 2011
This paper presents the prediction of yield loci for an AZ31 magnesium alloy sheet using a rate-dependent crystal-plasticity finite-element method. A differential work-hardening behavior was clearly observed; the contour of plastic work was initia...
Takayuki Hama, Keisuke Kojima, Yoshihiko Nishimura, Hitoshi Fujimoto, Hirohiko Takuda
Procedia Engineering   81 1029-1034   Jan 2014
© 2014 Published by Elsevier Ltd. A variation of lubrication condition on die surface during square cup sheet hydroforming was investigated experimentally. The lubrication condition on the die surface became worse in the late stage of the process....
HAMA TAKAYUKI, TAKUDA HIROHIKO
塑性加工連合講演会講演論文集   64th 283-284   Oct 2013
Takayuki Hama, Ken Kurisu, Keita Matsushima, Hitoshi Fujimoto, Hirohiko Takuda
9th International Conference on Technology of Plasticity, ICTP 2008   478-483   Jan 2008
The outflow characteristics of a pressure medium during a sheet hydroforming process have been studied experimentally. A square-cup sheet hydroforming process was carried out and the hydraulic pressure distribution was measured during the process....
Hitoshi Fujimoto, Natsuo Hatta, Hirohiko Takuda
American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED   244 159-166   Dec 1997
This paper treats the deformation process of a water droplet impinging on a hot surface above the Leidenfrost temperature. Emphasis is placed on the effects of the kind of surface material and the surface temperature on the deformation process. Th...

Research Grants & Projects

 
Prediction of Forming Limit in Sheet Metal Forming Using Ductile Fracture Criterion
Study on Formability of Magnesium Alloy Sheet