研究者/開発者/スタッフ紹介
Cristian TEODOSIU Cristian TEODOSIU


研究テーマ

材料内の構造変化を考慮した大塑性変形する金属材料のモデリング
複雑なプレス成型工程のモデリングとシミュレーション

研究内容と成果

大塑性変形を受ける構造物の大規模有限要素法シミュレーション
鋳造物が熱収縮する過程の熱力学モデリング
多孔質鋳鉄や高強度鋼の損傷や延性破壊の力学的, 数値的モデリング

今後の展望

先進的転移論に基づいた結晶塑性モデルの開発
高強度鋼の損傷と延性破壊のモデリング

VCAD公開ソフトウェア

V-Struct
V-Shrink
V-MultiMat
V-Biomech

ブロック全体図へ


論文・特許紹介

【論文】
Y. Nishidate, T. Nagata, S. Morita, Y. Yamagata, C. Teodosiu
Ray-tracing simulation procedure for general GRIN media
Frontiers in Optics 2010/Laser Science XXVI (FiO/LS 2010), Rochester, NY, USA, OSA Technical Digest (Optical Society of America, 2010), PDPA6.

S. Morita, Y. Nishidate, T. Nagata, Y. Yamagata, C. Teodosiu
Ray-tracing simulation method using a piecewise quadratic interpolant for aspheric optical systems
Applied Optics, 49, 3442-3451, 2010.

N. Yamamura, J.L. Alves, T. Oda, C.?Teodosiu
Development of a Finite Element Simulator for Mechanical Analysis of Human Skeletal Muscle
6th World Congress on Biomechanics, Singapore, 2010.

J.L. Alves, N. Yamamura, T. Oda, and C. Teodosiu
Numerical simulation of musculo-skeletal systems by V-Biomech
Proc. CMBBE2010 - 9th Int. Symp. on ‘Computer Methods in Biomechanics and Biomedical Engineering”, Valencia, Spain, 2010.

K. Ohura, C. Teodosiu, A. Makinouchi
Effects of heat transfer model between cast and mold and of the constitutive law in solidification simulation coupled with thermal contraction (in Japanese)
J. Japan Foundry Eng. Soc., 81, 323-330, 2009.

T. Hama, T. Nagata, C. Teodosiu, A. Makinouchi, H. Takuda
Finite-element simulation of springback in sheet metal forming using local interpolation for tool surfaces
Int. J. Mech. Sciences, 50, 175-192, 2008.

T. Hama, M. Takamura, A. Makinouchi, C. Teodosiu, H. Takuda
Formulation of contact problems in sheet metal forming simulation using local interpolation for tool surfaces
J. Comp. Sci. Technol., 2-1, 68-80, 2008.

N. Esmaeili, J.L. Alves, C. Teodosiu
Mechanical modeling and finite element analysis of porous cast products
J. Japan Soc. Prec. Eng., 74, 1273-1277, 2008.

T. Hama, M. Takamura, A. Makinouchi, C. Teodosiu, H. Takuda
Effect of tool modeling accuracy on square cup deep-drawing simulation
Materials Transactions, 49-2, 278-283, 2008.

K. Ohura, Z. Sun, A. Makinouchi, C. Teodosiu
Volume-CAD: An integrated environment for virtual manufacturing and structural analysis”
Advanced Materials Research, 23, 17-24, 2007.

T. Hama, M. Takamura, C. Teodosiu, A. Makinouchi, H. Takuda
Effect of tool modeling accuracy on sheet metal forming simulation
Key Engineering Materials, 340-341, 743-748, 2007.

K. Ohura, C. Teodosiu, A. Makinouchi
Solidification simulation with consideration of local variation of heat transfer coefficient caused by air-gap generation (in Japanese)
Journal of Japan Foundry Engineering Society, 79, 656-664, 2007.

T. Hama, C. Teodosiu, A. Makinouchi, H. Fujimoto, H. Takuda
Springback simulation of high strength steel sheet using local interpolation for tool surfaces 
Proc. NUMIFORM ‘07, 805-810, 2007.

M. Banu, M. Takamura, T. Hama, O. Naidim, C. Teodosiu, A. Makinouchi,
Simulation of springback and wrinkling in stamping of a dual-phase steel rail-shaped part
Journal of Materials Processing Technology, 173-2, 178-184, 2006.

H. Haddadi, S. Bouvier, M. Banu, C. Maier, C. Teodosiu
Towards an accurate description of the anisotropic behavior of sheet metals under large plastic deformations: Modeling, numerical analysis and identification
Int. J. Plasticity, 22, 2226-2271, 2006.

M. Banu, M. Takamura, O. Naidim, T. Hama, C. Teodosiu, A. Makinouchi, V. Marinescu, N. Yamamura
Comparative analysis of shell-solid finite element behaviour in a rail-shaped part stamping simulation
Proc. 9th Int. Conf. ESAFORM, Glasgow, U.K., 419-422, 2006.

T. Hama, M. Takamura, C. Teodosiu, A. Makinouchi, H. Takuda
Effect of tool modeling accuracy on sheet metal forming simulation
Proc. 8th Asia-Pacific Symp. on “Engineering Plasticity and its Applications” (AEPA2006), 225, 2006.

論文、特許一覧ページへ