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Numerical simulation of the crack propagation behavior in 3D elastic body
Taniguchi, Takeo,Miyaji, Akihiko,Suetsugu, Takeshi,Matsunaga, Shohgo Techno-Press 1994 Structural Engineering and Mechanics, An Int'l Jou Vol.2 No.3
The purpose of this investigation is to propose a numerical simulation method of the crack propagation behavior in 3-dimensionl elastic body. The simulation method is based on the displacement-type finite element method, and the linear fracture theory is introduced. The results from the proposed method are compared with those from the structural experiments, and the good coincidences between them are shown in this paper. At the same time, 2-dimensional analysis is also done, and the results are compared with those obtained from 3-dimensional analysis and the structural experiments.
A Geographical Study on Water Environmental Changes in the Urban Rivers in Tokyo, Japan
Taniguchi, Tomomasa The Korean Society of Limnology 2005 생태와 환경 Vol.38 No.S
It is important to assess the change of water environment in the present and past. In this study, present-day water quality standards are applied to the expressions in literary works to reconstruct the historical water environment including the quality. As the result, the historical reconstruction of water quality has been made distribution of water quality from 1905 to 1935 for the Sumida River in Tokyo.
ERRATUM : 'LYMANα EMITTERS BEYOND REDSHIFT 5: THE DAWN OF GALAXY FORMATION' (JKAS, 36, 123, [2003])
Taniguchi, Yoshiaki,Shioya, Yasuhiro,Ajiki, Masaru,Fujita, Shinobu S.,Nagao, Tohru,Murayama, Takashi The Korean Astronomical Society 2003 Journal of The Korean Astronomical Society Vol.36 No.4
The first sentence in the second paragraph of INTRODUCTION, 'The first discovery of a galaxy beyond z=5 was reported by Weymann et al. (1998); HDF 4-470.3 at z=5.60.' should be read as 'The first discovery of a galaxy beyond z=5 was reported by Dey et al. (1998); 0140+326 RD1 at z=5.34'. The authors sincerely regret this error.
Tensile strength of unidirectional CFRP laminate under high strain rate
Taniguchi, Norihiko,Nishiwaki, Tsuyoshi,Kawada, Hiroyuki The Korean Society for Composite Materials 2007 Advanced composite materials Vol.16 No.2
The tensile strength of unidirectional carbon fiber reinforced plastics under a high strain rate was experimentally investigated. A high-strain-rate test was performed using the tension-type split Hopkinson bar technique. In order to obtain the tensile stress-strain relations, a special fixture was used for the impact tensile specimen. The experimental results demonstrated that the tensile modulus and strength in the longitudinal direction are independent of the strain rate. In contrast, the tensile properties in the transverse direction and the shear properties increase with the strain rate. Moreover, it was observed that the strain-rate dependence of the shear strength is much stronger than that of the transverse strength. The tensile strength of off-axis specimens was measured using an oblique tab, and the experimental results were compared with the tensile strength predicted based on the Tsai-Hill failure criterion. It was concluded that the tensile strength can be characterized quite well using the above failure criterion under dynamic loading conditions.