Hideo Tsutamori
Toyota
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Publication
Featured researches published by Hideo Tsutamori.
MATERIALS PROCESSING AND DESIGN; Modeling, Simulation and Applications; NUMIFORM '07; Proceedings of the 9th International Conference on Numerical Methods in Industrial Forming Processes | 2007
Noritoshi Iwata; Hideo Tsutamori; Masatomo Niihara; Hiroshi Ishikura; Yasuyoshi Umezu; Atsunobu Murata; Yasuhiro Yogo
In the sheet metal forming simulation, the shell element widely used is assumed as a plane stress state based on the Mindlin‐Reissner theory. Numerical prediction with the conventional shell element is not accurate when the bending radius is small compared to the sheet thickness. The main reason is because the strain and stress formulation of the conventional shell element does not fit the actual phenomenon. In order to predict precisely the springback of a bent sheet with a severe bend, a measurement method for through‐thickness strain has been proposed. The strain was formulated based on measurement results and calculation results from solid element. Through‐thickness stress distribution was formulated based on the equilibrium. The proposed shell element based on the formulations was newly introduced into the FEM code. The accuracy of this method’s prediction of the springback shape of two bent processes has been confirmed. As a result, it was found that the springback shape even in severe bending can b...
NUMISHEET 2014: The 9th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes: Part A Benchmark Problems and Results and Part B General Papers | 2013
Naoki Ichijo; Noritoshi Iwata; Takamichi Iwata; Taichi Mita; Masatomo Niihara; Hideo Tsutamori
In designing dies of automotive outer panels, the most difficult process is to modify surface deflection. To fabricate high-quality outer panels without modifying dies, it is important to develop an evaluation method and a numerical analysis method for surface deflection of outer panels. In this study, we have developed a new evaluation method that uses the maximum value of curvature calculated using reflecting curves in the surface. This new evaluation method made the examiners evaluation to conform with the digital evaluation. The evaluation results with the new method shows better agreement with the sensory value than those with the conventional methods. We have proposed the new analysis method to predict surface deflection correctly. By the proposed simulation method, plastic deformation is calculated in consideration of stress in thickness direction, and restriking conditions have been examined. We have applied our methods to the fabrication of automotive outer panels, and verified that these are useful and practical.In designing dies of automotive outer panels, the most difficult process is to modify surface deflection. To fabricate high-quality outer panels without modifying dies, it is important to develop an evaluation method and a numerical analysis method for surface deflection of outer panels. In this study, we have developed a new evaluation method that uses the maximum value of curvature calculated using reflecting curves in the surface. This new evaluation method made the examiners evaluation to conform with the digital evaluation. The evaluation results with the new method shows better agreement with the sensory value than those with the conventional methods. We have proposed the new analysis method to predict surface deflection correctly. By the proposed simulation method, plastic deformation is calculated in consideration of stress in thickness direction, and restriking conditions have been examined. We have applied our methods to the fabrication of automotive outer panels, and verified that these are us...
Archive | 2008
Taichi Mita; Hideo Tsutamori; Hiroyuki Nakagawa
Archive | 2002
Hiroshi Ishikura; Noritoshi Iwata; Atsunobu Murata; Hiroyoshi Nakanishi; Hideo Tsutamori; Satoshi Yamazaki; 中西 広吉; 山崎 悟志; 岩田 徳利; 村田 篤信; 石倉 洋; 蔦森 秀夫
Archive | 1999
Hideki Ikeda; Noritoshi Iwata; Koji Kaneko; Susumu Kato; Masao Matsui; Shingo Nishimura; Hideo Tsutamori; 享 加藤; 徳利 岩田; 正夫 松居; 秀樹 池田; 秀夫 蔦森; 信吾 西村; 光司 金子
Archive | 2003
Makoto Momotori; Hideo Tsutamori; Satoshi Yamazaki; 悟志 山崎; 誠 百鳥; 秀夫 蔦森
Archive | 2001
Hideo Tsutamori; 秀夫 蔦森
Archive | 2012
Takamichi Iwata; 隆道 岩田; Noritoshi Iwata; 徳利 岩田; Naoki Ichijo; 尚樹 一条; Hideo Tsutamori; 秀夫 蔦森
Archive | 2003
Makoto Momotori; Takanori Suwa; Hideo Tsutamori; Satoshi Yamazaki; 悟志 山崎; 誠 百鳥; 秀夫 蔦森; 高典 諏訪
Journal of the Japan Society for Technology of Plasticity | 2013
Naoki Ichijo; Noritoshi Iwata; Takamichi Iwata; Taichi Mita; Hideo Tsutamori