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Taku UENO, Yasuhisa SATO
Article type: Article
Session ID: 835
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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Kenichi SAKAUE, Shinichi SUZUKI
Article type: Article
Session ID: 836
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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Shinichi SUZUKI, Kazuya IWANAGA, Shinta KAJI, Kenichi SAKAUE
Article type: Article
Session ID: 837
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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Masaki FUJIKAWA, Masahisa TAKASHI
Article type: Article
Session ID: 838
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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Naomi Hamada, Masao Sakane, Akihiko Hirano
Article type: Article
Session ID: 839
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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Article type: Appendix
Pages
App11-
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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Shouzi YAMAZAKI, Kenji IIMURA, Mitsuaki HIROTA
Article type: Article
Session ID: 901
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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Katsumi TAO, Yoshinori KUBO, Naoyuki TSUCHIYA, Yasunori HAYAKAWA
Article type: Article
Session ID: 902
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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Yoshihiro Narita
Article type: Article
Session ID: 903
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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Shin ITO, Kazuo HAYASHI, Gen SAWAI
Article type: Article
Session ID: 904
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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In order to clarify the interfacial stiffness due to partial contact between upper and lower crack surfaces, the interfacial stiffness is derived from the relationship between effective pressure (difference between the earth stress normal to crack and fluid pressure in the crack) and the permeability, of crack. This relationship is based on the power law distribution model. The interfacial stiffness consists of the ratio of real contact area to crack area, effective pressure and so on. The ratio of real contact area to crack area has strong effect on interfacial stiffness in the case of smooth crack surface. And also, effects of these parameters on dynamic response of the crack are shown.
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Hidetoshi SAKAMOTO, Noboru UEDA, Toshihiko YAMAGUCHI
Article type: Article
Session ID: 905
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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Tomohisa NUNAJIRI, Tsutomu EZUMI
Article type: Article
Session ID: 906
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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Shuutei SASAKI, Tsutomu EZUMI
Article type: Article
Session ID: 907
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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In the recent society, we use many various tools which are made of the high polymer material for the daily life. And the new polymer material is studied, developed and invented. These materials are made on the automation line systems in the factories. The products owes a rigious test to the safety and the confidence, are shipped to the users or exported to the many countries. After testing, however, materials often contain the cracks, holes or inclusions. The stress intensity generates at the summit of the crack. may cause the big accidents. Cracks, holes or inclusions have negative effects on the rigidity and the safety. Many researchers are studying the problems about cracks, holes and inclusions in the materials, and this matter was experimented and analyzed using the polycarbonate by authors. This paper showed the mixture mode about a comparison of the distances and the angle from a summit of the crack.
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Yoshihiro Narita
Article type: Article
Session ID: 908
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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Shinji OCHI, Hitoshi TAKAGI
Article type: Article
Session ID: 909
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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Kohji SUZUKI, Isao KIMPARA, Kunio FUNAMI
Article type: Article
Session ID: 910
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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AKira SHINOZAKI, Kikuo KISHIMOTO, Hirotsugu INOUE
Article type: Article
Session ID: 911
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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Tetsuo NOGUCHI, Tsutomu EZUMI
Article type: Article
Session ID: 912
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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Before, we reported a standard for safety in the circumference of the center hole in the lathe processing. Recently, regenerated material is used. Regenerated material contains an inclusion. Inclusions often become the cause of stress concentration and failures. Every structure possibly includes inclusions. As there are many cases in which high stress arises around an inclusion and causes cracks and exfoliations from the matrix leading to a fracture, it is important to analyze the deformation behaviors around the inclusion. Although there have been many researches through theoretical analysis, research examples of inclusions through experimental analysis are very few. The experiment was conducted by the photoelastic method, finite element method. Polycarbonate was used as a test specimen model, and three different kinds of materials, epoxy resin, PMMA and polyethylene, were used as elliptic inclusions. As a result of this experiment, the experimental equations relating to the equivalent stress were obtained.
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Kenichi MASUDA, Kuniharu USHIJIMA, Dai-heng CHEN
Article type: Article
Session ID: 913
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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Takeshi HIRATSUKA, Dai-heng CHEN, Kuniharu USHIJIMA
Article type: Article
Session ID: 914
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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Hiroshi SAKAIZAWA, Dai-heng CHEN, Kuniharu USHIJIMA
Article type: Article
Session ID: 915
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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Masayuki TAKANO, Dai-heng CHEN, Kuniharu USHIJIMA
Article type: Article
Session ID: 916
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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Yuki SHIMIZU, Dai-heng CHEN, Kuniharu USHIZIMA
Article type: Article
Session ID: 917
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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Ma Yong, Kimihisa MIURA, Tadashi OHYOSHI
Article type: Article
Session ID: 918
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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Hirokazu HORII, Kuniharu USHIJIMA, Dai-heng CHEN
Article type: Article
Session ID: 919
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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Takuma FUNABASHI, Kimihisa MIURA, Shouta Abe, Yoshiaki Ito
Article type: Article
Session ID: 920
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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[in Japanese]
Article type: Article
Session ID: 921
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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The object of this article is to study the numerical methods for solving two-dimensional transient wave propagation problems. The first method proposed by Clifton involves the characteristic method for two-space variables, and the second method proposed by Mengi involves the use of the combination of. a Fourier transform for one space variable and the characteristic method for one space variable. An example problem is presented which involves transient waves in an elastic layer. generated by out-of-plane shear stress acting on its top surface.
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Tomoaki TSUJI
Article type: Article
Session ID: 922
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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We study the dynamic analysis of the void growth from a defect by using the finite difference method with the hyper-elastic material. As the initial condition, the sphere with small spherical void is subjected to the hydrostatic tensile load and the surfaces are fixed. The inner void surface is set to free at the time t=0. Then the radius of the inner void surface is growing transiently. The time dependence of the inner void radius is studied with the various values of the initial stretch at the outer surface.
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Kazumi WATANABE, [in Japanese]
Article type: Article
Session ID: 923
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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Doppler effects in plane SH-waves are discussed. Three types of the moving source are considered: (a) uniform motion, (b) back and forth motion, (c) rotation. Exact expressions for the anti-plane displacement are obtained. Numerical examples show that the high frequency components have the crucial role in the response.
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Kimihisa Miura
Article type: Article
Session ID: 924
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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Ryo KOBAYASHI, Hisao HASEGAWA
Article type: Article
Session ID: 925
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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This paper deals with a stress concentration problem of an elastic half plate with a circular hole. The half plate is subjected to a uniform pressure acting partially on the straight boundary. A method of solution is presented for the problem by applying Green's functions for body force problems of an elastic half plate. The Green's functions are the Melan's solution for a point force acting in the interior of the half plate. Stress distributions around the hole are investigated.
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Takashi SASAKI, Hisao Hasegawa
Article type: Article
Session ID: 926
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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This paper deals with a stress concentration problem of an elastic circular solid cylinder with a rigid spherical inclusion under uniform surface pressures. A method of solution is presented for the problem by using Green's functions for axisymmetric body force problems of an elastic solid cylinder. Stress distributions around the inclusion are investigated.
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[in Japanese], [in Japanese], [in Japanese], [in Japanese]
Article type: Article
Session ID: 927
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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Isao TAGUCHI, Michio KURASHIGE, Kazuwo IMAI
Article type: Article
Session ID: 928
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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Cun-Fa GAO, Naotake NODA
Article type: Article
Session ID: 930
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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This paper deals with a two-dimensional problem of a loaded circular hole in an infinite piezoelectric composite plate by use of the complex variable method. First, we give the Green function for a generalized point load acted at an arbitrary point at the rim of the hole, and then derive a general solution for the case of arbitrarily distributed mechanical and electric loading on the hole surface based on the superposition principle. In general, the solution is in form of series, but its novel feature is that the coefficients involved in the solution can be easily written out once the distributed loading on the hole surface is given.
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Yoshihiro OOTAO, Yoshinobu TANIGAWA
Article type: Article
Session ID: 931
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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This paper is concerned with the theoretical analysis of steady piezothermoelastic problem of inhomogeneous piezoelectric cylindrical panel due to nonuniform heat supply in the circumferential direction. The thermal, thermoelastic and piezoelectric constants of the cylindrical panel are expressed as power functions of the radial coordinate variable. We obtain the exact solution for the two-dimensional temperature change in a steady state, and piezothermoelastic response of a simply supported cylindrical panel under 'a plane strain state. Some numerical results are shown in figures.
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Tsuyoshi FUJITA, Masayuki ISHIHARA, Naotake NODA
Article type: Article
Session ID: 932
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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Takuya UEHARA, Takato TAMAI
Article type: Article
Session ID: 934
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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Molecular dynamics simulations on the shape memory effect are carried out by using the EAM potential for Ni-Al alloy. As a preliminary calculations, the stable crystal structures are investigated so that both bcc and martensite phases are obtained, and the temperature-dependent transformation can occur. As a result, it is revealed that 60-70% Ni models show the martensite structure at low temperature, and bcc at high temperature, and the transformation temperature depends on the Ni content. Then, a series of loading, unloading, heating, and cooling conditions is imposed for 68% Ni model, and the shape memory effects are exhibited by the martensitic transformation and variant deformation.
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Satoko ONO, Yotsugi SHIBUYA
Article type: Article
Session ID: 935
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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Stress analysis of human body applying FEM has been performed. Hexahedral FEM meshes has advantage to make accurate analysis. Three dimensional analysis with hexahedral FEM Meshes is more effective in three dimensined solid meshes. As shape of anatomy is complicated, we need much cost to make up the FEM model. In this study, an efficient method is developed to make up the hexahedral FEM model by use of ICP method. By applying the approach, an example of the FEM model based on the X-ray CT images of the vertebra is shown.
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Yoshihito OZAWA, Takeo WATANABE
Article type: Article
Session ID: 936
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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In this paper, the mechanical behavior of short fiber reinforced polymer (SFRP) composites in high vacuum and temperature conditions is investigated. Even though tested at the same temperature 298 K, the SFRP. composite kept in high vacuum condition has higher tensile strength and equivalent Young's modulus than that in the atmospheric condition. In high vacuum condition, the matrix resin is shrank owing to the degas and/or moisture desorption from the matrix and from the interface between the matrix and fibers, and thus yield the residual stresses in the composites. A homogenization theory with multi-scale asymptotic expansion 'and a fiber distribution model is described for evaluation of mechanical property of SFRP composites in environmental conditions.
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Nobuhiro YOSHIKAWA, Sergey V. DMITRIEV, Masanori KOHYAMA, Shingo TANAK ...
Article type: Article
Session ID: 937
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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Yoji SHIBUTANI
Article type: Article
Session ID: 938
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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Yoshihiro OOTAO, Yoshinobu TANIGAWA, Hiroaki NAKAMOTO
Article type: Article
Session ID: 939
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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In this study, the theoretical analysis of transient piezothermoelasticity is developed for laminated composite strip bounded to a piezoelectric layer and the electrode layers, subject to nonuniform heat supply in the width direction. Using the analytical procedure of a laminated of composite strip model, we obtain the solution for the two-dimentional temperature change in a transient state, and piezothermoelasticity of simply supported combined strip under the state of plane strain. Some numerical results for the effects of the electrode layers on the temperature change and piezothermoelastic behavior when the thermoelastic displacement is not controlled or controlled are shown in figures.
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Sei UEDA, Atsushi HATAGAKI, Yuichiro KANADA
Article type: Article
Session ID: 940
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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Ryuuji UCHIYAMA, Masayoshi SHIMIZU, Takahito GOSHIMA, Sotomi ISHIHARA
Article type: Article
Session ID: 942
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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Yoshihiro SUGANO, Yuuki HAREYAMA, Kiyoshi HOSHI
Article type: Article
Session ID: 943
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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Yuki TAKAGI, Ryuusuke KAWAMURA, Yoshinobu TANIGAWA
Article type: Article
Session ID: 944
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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We assume the rectangular plate that possesses orthotropy in in-plane direction and inhomogeneity in out-of-plane direction. The rectangular plate has symmetric inhomogeneous material properties with respect to middle surface and initial deflection. Assuming that the plate is subjected to nonuniform heat supply from boundary surfaces, we derived three-dimensional temperature change in a steady state. Thereafter, we derived equilibrium equations in the plate with initial deflection using variational principle. We carry out numerical calculation and discuss the effects of orthotropy and inhomogeneity in material properties and initial deflection upon critical buckling temperature change and post-buckling behavior.
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Masahiro HIGUCHI, Ryuusuke KAWAMURA, Yoshinobu TANIGAWA
Article type: Article
Session ID: 945
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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In the present article, a theoretical treatment of magnetothermoelastic stresses and deformation by cyclic time variation of magnetic field is dealt with in a conducting hollow circular cylinder subjected to both internal heat generation due to eddy current loss and Lorentz force. Assuming that uniform magnetic field whose intensity varies sinusoidally in time acts on the hollow circular cylinder in the direction parallel to its outer surface, plane axisymmetrical magnetic field and the associated eddy current in the hollow circular cylinder due to electromagnetic induction have been formulated based on the theory of quasi-stationary electromagnetic field. Therefore, stresses and deformation in a conducting hollow circular cylinder, which are subjected to both plane axisymmetrical temperature change due to eddy current loss and Lorentz force, have been analyzed under generalized plane strain condition. Carrying out numerical calculations, we examine the effects of the frequency in cyclic variation of magnetic field on the electro-magnetic field and radius ratio of the hollow circular cylinder, current density, temperature change and stress and deformation in the hollow circular cylinder.
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Yoshihiro OBATA, Fumie Abe, Hideaki Sugino, Kozo KANAYAMA
Article type: Article
Session ID: 946
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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Hidetoshi KOBAYASHI, Masashi DAIMARUYA, Motoki SAKURAZAWA
Article type: Article
Session ID: 947
Published: July 20, 2004
Released on J-STAGE: August 01, 2017
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In this research, the aspect ratio of lamina and the laminar angel, which is a slant angle of a half lamina from the midrib to its side edge, of eight plant leaves with pinnate venation were measured to investigate their mechanical contribution to the rigidity of a leaf regarded as a structure with wide and flat surface. From the data of leaves with different aspect ratio, it was clarified that the plant leaves with the different aspect ratio adopted the different strategies to support own bodies: slender leaves keep their own body by relatively large laminar angle and midrib stiffness, although wide leaves raise their rigidity due to relatively large lamina stiffness.
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