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Yoji YAMADA, Seiichi KOSHIZUKA
Article type: Article
Session ID: 1013
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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Particle method is a meshless method mainly developed for fluid analysis. Feature of this method is that continuum is represented by a finite number of particles and dynamics is calculated by movement of particles. In this paper a three-dimensional particle method for elastic shells is developed using an explicit spring model. In this method virtual particles placed in the normal direction connected with neighbor particles by springs, and the particles move by the spring force. The spring constant is determined by the bending rigidity of the plate. The lateral vibration is analyzed by this method and results are compared with the classical plate theory.
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Haruki OBARA, Akinori KOYAMA, Mariko Honda
Article type: Article
Session ID: 1014
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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Hidenori KINOSHITA, Tuyoshi YASU, Atsuko SHIMOSAKA, Yoshiyuki SHIRAKAW ...
Article type: Article
Session ID: 1015
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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Hirotsugu TATEISHI, Seiya HAGIHARA
Article type: Article
Session ID: 1016
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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Hiroaki OSAKI, Yasushi NAKABAYASHI, Genki YAGAWA
Article type: Article
Session ID: 1022
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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This paper describes the 2D crack propagation analysis using the Free Mesh Method (FMM). The computational fracture mechanics involves frequent re-meshing as the crack propagating. In order to show the effectiveness of the FMM in crack propagation analysis, we solve the 2D crack propagation problems with the FMM. The method controlling the crack propagation will be proposed using Neural Network.
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Hayato SUZUKI, Yoshitaka EZAWA, Genki YAGAWA
Article type: Article
Session ID: 1023
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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Free Mesh Method which is a kind of meshless method is the technique that is particularly effective for crack propagation analysis. It is applied to the two-dimensional crack problem so far. However, it is difficult to use quadratic elements in Free Mesh Method. Therefore the accuracy of the stress field of the crack tip is assumed to be insufficient. This study proposes the introduction of Enriched Free Mesh Method to make highly accurate crack propagation analysis.
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Kenta INAGAKI, Noriyuki IMAMURA, Seiichi KOSHIZUKA
Article type: Article
Session ID: 1024
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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A new method is developed to visualize simulation results which include the fracture of elastic material. Moving Particle Semi-implicit Method (MPS) is used to simulate the behavior of elastic material. Separation tensor is introduced, which describes the state of balancing force at each particle. The separation tensor is used to predict the occurrence and the direction of fracture. For the visualization of the simulation results, the vertices of polygons are related to the position of the nearest particle and they are moved according to the displacement of the particle. When the fracture occurs, they are visualized by generating new polygons around the fracture.
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Yusuke SATO, Tsukasa NAKAYAMA
Article type: Article
Session ID: 1025
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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The smoothed particle hydrodynamics (SPH) method is applied to the numerical simulation of cutting of a solid body by a high-speed water jet. Water is modeled as a viscous fluid with weak compressibility. A solid body is modeled as an elastic material. The water and solid body are discretized into a lot of particles. These particles are moved in a Lagrangian manner according to the governing equations of motion of water and solid body. Numerical calculations are carried out in 2-dimension and 3-dimension for a solid like wood. Encouraging numerical results have been obtained.
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Keisuke OKITA, Kazuyuki TSUTSUMI, Katsuhiro IWASAKI, Manabu FUJITA, Hi ...
Article type: Article
Session ID: 901
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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The influence of the carburizing on the gear shape after the quenching was investigated by heat-treatment simulation. In the heat-treatment simulation of the carburized gear, considering the effect of the carbon content on the material properties, i.e., the stress-strain curves and martensite transformation temperature, the analysis accuracy was significantly improved. It is found that the carbon content dependencies of material properties should be considered in the simulation to predict the deformation of the gear accurately.
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Katsumi NAKAJIMA, Yasushi TANAKA, Yoshihiro HOSOYA, Markus APEL, Ingo ...
Article type: Article
Session ID: 902
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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Takuya UEHARA
Article type: Article
Session ID: 903
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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Phase field simulation has become one of the most effective methods to predict the microstructure in solidified materials including complicated dendritic pattern. The author and his colleagues have derived a set off coupling equations among phase, temperature and stress/strain by using a phase field model, and demonstrated several simulations on stress evolution and residual stress distribution in solidification structures. The fundamental equations and simulation results in a solidified material with complicated dendritic structure are represented in this report, and the advantage of this model for evaluating stress distribution and remained problems to be improved are discussed by referring those equations and results.
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Tomoyuki HIROUCHI, Tomohiro TAKAKI, Yoshihiro TOMITA
Article type: Article
Session ID: 904
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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Takeshi IWAMOTO, Mohammed CHERKAOUI, Toshiyuki SAWA
Article type: Article
Session ID: 905
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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Keisuke OHYAMA, Fumihito NISHIMURA
Article type: Article
Session ID: 906
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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Karin HIRAKAWA, Fumihito NISHIMURA
Article type: Article
Session ID: 907
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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Akinori YAMANAKA, Tomohiro TAKAKI, Yoshihiro TOMITA
Article type: Article
Session ID: 908
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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Tetsuya OHASHI, Atsushi WADA
Article type: Article
Session ID: 909
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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Mayu MURAMATSU, Yuichi TADANO, Kazuyuki SHIZAWA
Article type: Article
Session ID: 910
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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Tomohiro TAKAKI, Katsumasa TANAKA, Yoshihiro TOMITA
Article type: Article
Session ID: 911
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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Yousuke HISAKUNI, Tomohiro TAKAKI, Yoshihiro TOMITA
Article type: Article
Session ID: 912
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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Toshiyuki KOYAMA
Article type: Article
Session ID: 913
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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Yoshihiro SUWA, Yoshiyuki SAITO, Hidehiro ONODERA
Article type: Article
Session ID: 914
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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Masahiro HATA, Hideo SUGAWARA, Kazuyuki SHIZAWA
Article type: Article
Session ID: 915
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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[in Japanese], [in Japanese]
Article type: Article
Session ID: 916
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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Susumu SHIRAYAMA
Article type: Article
Session ID: 201
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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Yuichiro KITAGAWA, Juhachi ODA, Shinobu SAKAI
Article type: Article
Session ID: 202
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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Kentaro SUTO, Seiichi KOSHIZUKA
Article type: Article
Session ID: 203
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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Katsuyuki SUZUKI, Tetsuya MAKINO
Article type: Article
Session ID: 204
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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Minoru Sakata, Daisuke Nagai, Hisanori Ohara, Masataka Takano, Masafum ...
Article type: Article
Session ID: 401
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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CFD difference scheme for structured grid system is derived. This Technique is able to apply for object with complex shape, and to generate analysis model automatically and quickly from CAD data. Furthermore, this technique enable to solve the flow around thin plate structures, and various moving boundary problems.
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Minoru Sakata, Masataka Takano, Yasuo Okuda
Article type: Article
Session ID: 402
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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Tsunami is the severe problem occurs in neighbering waters arround Japan. But previous numerical approach is limited withen wide area analysis, detailed analysis using CFD is very rare. We have solved Tsunami as flow with free sutface numerically by VOF technique, and evaluate surface pressure loading real building with and without windows.
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Minoru Sakata, Hiromasa Nakayama, Hisanori Ohara, Akira Hayakawa
Article type: Article
Session ID: 403
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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Direct Numerical Simulation (DNS) Technique is developed for prediction of wind pressure on building structure with edge. This Technique has got good agreement to the results for the cube and the roof structure in comparison with Wind Experiments.
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Shingo KIKUKAWA, Hideki SHIMOHARA, Jiro FUNAKI, Katuya HIRATA
Article type: Article
Session ID: 404
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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Minoru Sakata, Daisuke Nagai, Hisanori Ohara, Masataka Takano, Masafum ...
Article type: Article
Session ID: 406
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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CFD Technique for moving boundary is described. Super Cartesian method for expressing 3-dimensional complex shape enables to move boundary suefaces defined form CAD data. Analysis examples of mobing auto mobile are explained.
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Takahiro YAMADA, Tomohiro KAYANE, Yoshiaki ITOH
Article type: Article
Session ID: 407
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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Katsutoshi CHIKUMA, Shuichi KATO, Toru MAEDA, Masatsugu YOSHIZAWA
Article type: Article
Session ID: 408
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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In micro systems such as micro-electro mechanical systems (MEMS), gap flow between systems and the surrounding wall changes due to the vibration of systems, and it may cause intense and complex interaction between the motion of systems and fluid flow. This research deals with vortex-induced transverse vibration of a spring-supported circular cylinder in a narrow channel. The objective is to clarify the effect of channel wall on the lock-in phenomena numerically, with the two-dimensional model. The marker-and-cell (MAC) method is applied in the numerical calculation. It was found that the lock-in region becomes narrow when the gap between the wall and the cylinder becomes small.
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Norio KONDO
Article type: Article
Session ID: 409
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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Tetsuro SATO
Article type: Article
Session ID: 410
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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Minoru Sakata, Daisuke Nagai, Hisanori Ohara, Masataka Takano, Masafum ...
Article type: Article
Session ID: 411
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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Moving boundary CFD technique based on Cartesian grid was applied to air flow arround vehicle Bodys. This technique can simulate the behaviers of velocity and pressure distribution arround moving vehicles in the carm air and wind. The prediction results for carve running and running in crosswind are discussed.
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Kanako Yasue, Keisuke Sawada
Article type: Article
Session ID: 412
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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Azuma OKUNO, Ichiro NISHIGAKI, Shigeki SENOO
Article type: Article
Session ID: 413
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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Junya IMAMURA
Article type: Article
Session ID: 414
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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Takeshi SUGIMURA, Keiko TAKAHASHI
Article type: Article
Session ID: 415
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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Shinichiro MIURA
Article type: Article
Session ID: 416
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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Minoru Sakata, Daisuke Nagai, Hisanori Ohara, Masataka Takano, Masafum ...
Article type: Article
Session ID: 417
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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Numerical analysis technique with high speed and high accuracy for radiation problem is developed. This technique is called Top Priority method offers the efficient selection of relations between descritized surfaces as to computation of Stefan Boltzmann Equation. Several examples are discussed for showing this techinique.
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Yusuke MUROMOTO, Tsukasa NAKAYAMA
Article type: Article
Session ID: 418
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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This paper deals with the numerical analysis of the interaction among gas, liquid and solid phases by the combined use of the fictitious domain and the level set methods. Fluid-solid interaction is treated by the fictitious domain method. Gaseous and liquid phases are treated by the level set method. As a numerical example, the flow of gas and liquid around a circular rigid body penetrating into a still liquid has been calculated. Encouraging results have been obtained.
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Koichi TSUJIMOTO, Makoto NAGAOKA, Toshihiko SHAKOUCHI, Toshitake ANDO
Article type: Article
Session ID: 419
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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Mitsuhiro KOGA, Jiro FUNAKI, Katsuya HIRATA
Article type: Article
Session ID: 420
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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Article type: Appendix
Pages
App7-
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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Junya IMAMURA
Article type: Article
Session ID: 301
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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Junya IMAMURA
Article type: Article
Session ID: 302
Published: November 25, 2007
Released on J-STAGE: June 19, 2017
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