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Yasushi TABATA, Kisaragi YASHIRO, Yoshihiro TOMITA
Article type: Article
Pages
491-492
Published: September 23, 2003
Released on J-STAGE: August 01, 2017
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Hideo KOGUCHI
Article type: Article
Pages
493-494
Published: September 23, 2003
Released on J-STAGE: August 01, 2017
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Tatsuro MORITA, Hiroharu TSUJI
Article type: Article
Pages
495-496
Published: September 23, 2003
Released on J-STAGE: August 01, 2017
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A computer simulation of dislocation dynamics was conducted to obtain basic knowledge concerning the fatigue crack initation which occurs through the formation of intrusion or extrusion under an alternation stress. This simulation was based upon the movements of edge dislocations on slip planes in a crystal grain adjacent to the surface. The dislocation behavior was predicted from the rigorous equation which gives the stress applied to them near the surface. The result showed that this simulation method can be a powerful tool to estimate the formation of a fatigue crack.
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Takuya UEHARA, Takahiro TSUJINO, Tatsuo INOUE
Article type: Article
Pages
497-498
Published: September 23, 2003
Released on J-STAGE: August 01, 2017
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In-solid phase transformation process is simulated by using the phase field model. The modified model which take the coupling effects among the phase field, temperature and stress/strain into account is applied. The main transformation from the original phase A into new phase B, is expressed by the conventional phase field φ and the phase field equations. In order to consider the third phase, an auxiliary variable, which indicates the difference of the phase B1 and B2,is introduced. Simulation result under the condition that shrinkage for B1 and dilatation for B2 occur during the transformation shows that the residual stresses distribution of tension and compression in the B1 and B2 regions, respectively.
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Takeshi IWAMOTO, Shinji KUBO
Article type: Article
Pages
499-500
Published: September 23, 2003
Released on J-STAGE: August 01, 2017
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Article type: Appendix
Pages
App9-
Published: September 23, 2003
Released on J-STAGE: August 01, 2017
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Makoto NIWA, Takahito GOSHIMA, Sotomi ISHIHARA, Masayoshi SHIMIZU
Article type: Article
Pages
501-502
Published: September 23, 2003
Released on J-STAGE: August 01, 2017
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Makoto SUZUKI, Toshiaki HARA
Article type: Article
Pages
503-504
Published: September 23, 2003
Released on J-STAGE: August 01, 2017
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Yoshinobu TANIGAWA, Ryuusuke KAWAMURA, Ryohei YOKOTA
Article type: Article
Pages
505-506
Published: September 23, 2003
Released on J-STAGE: August 01, 2017
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In this paper, we deal with an isothermal plane elastic problem of an inhomogeneous medium. As an analytical model, we consider the plane elastic problem for a semi-infinite medium with a Griffith crack in arbitrary position subject to uniformly distributed internal pressure on the crack surfaces. Making use of the fundamental equations system, which is already established in our previous paper, the analytical solution for such singular stress field is successfully developed. The elastic behaviors are evaluated through the numerical calculations.
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Akihide Saimoto, Yasufumi Imai, Fumitaka Motomura
Article type: Article
Pages
507-508
Published: September 23, 2003
Released on J-STAGE: August 01, 2017
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Eiichiro TSUCHIDA, Yoshio ARAI, Shinichi YAMAMOTO, Ryo KATO
Article type: Article
Pages
509-510
Published: September 23, 2003
Released on J-STAGE: August 01, 2017
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In the thin elastic plate theory, bi-harmonic displacenent function or complex variable stress function methods are widely used. We propose harmonic displacement potentials method. Then we can solve complicated multi-connected domain problems. In this paper, we present an analytic solution for a semi-infinite elastic plate containing an elliptic hole under transverse bending at infinity.
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Yasuhiro MATSUNAGA
Article type: Article
Pages
511-512
Published: September 23, 2003
Released on J-STAGE: August 01, 2017
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In this study, the characterization of TiNi shape memory alloy coil springs is described. At first, the results of uniaxial tensile test for the TiNi wire and coil springs are described. By use of the kinetics model and the mixture theory of parallel type and series types, the stress distributions and load-displacement curves for TiNi coil springs are predicted analytically. The numerical calculations are performed by use of the material constants obtained by the previous tests. The both results, analytical and experimental results, are compared and discussed.
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Yousuke ONAGI, Hisao HASEGAWA
Article type: Article
Pages
513-514
Published: September 23, 2003
Released on J-STAGE: August 01, 2017
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Yoshihiro OBATA, Hideaki SUGINO, Fumie ABE, Kozo KANAYAMA
Article type: Article
Pages
515-516
Published: September 23, 2003
Released on J-STAGE: August 01, 2017
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Toshio FURUKAWA
Article type: Article
Pages
517-518
Published: September 23, 2003
Released on J-STAGE: August 01, 2017
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Ryuuji UCHIYAMA, Masayoshi SHIMIZU, Takahito GOSHIMA, Sotomi ISIHARA
Article type: Article
Pages
519-520
Published: September 23, 2003
Released on J-STAGE: August 01, 2017
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Hiroshi NOGUCHI
Article type: Article
Pages
521-522
Published: September 23, 2003
Released on J-STAGE: August 01, 2017
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Yasutomo UETSUJI, Takayuki YAMAKAWA, Toshihiro YOSHIDA, Sei UEDA, Eiji ...
Article type: Article
Pages
523-524
Published: September 23, 2003
Released on J-STAGE: August 01, 2017
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Shinji YOSHIDA, Fumihiro ASHIDA, Seiichiro SAKATA
Article type: Article
Pages
525-526
Published: September 23, 2003
Released on J-STAGE: August 01, 2017
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This paper discusses a displacement control problem in a two-layered composite plate consisting of a transversely isotropic structural layer onto which a piezoceramic layer of crystal class 6mm is perfectly bonded. It is considered that some electrodes are metallized on the top free surface in a concentric configuration. When an axisymmetric heating temperature acts on the bottom free surface, the thermally induced elastic displacement on the structural layer surface could be controlled by applying a different electric voltage to each electrode. The applied electric potentials are determined by an approximate optimization using neural networks so that the difference between the desired and thermally induced elastic displacement distributions is minimized. Finally, numerical results for the controlled displacement distribution and applied electric potentials are illustrated graphically.
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Yasuyoshi SAWADSA, Masayuki ISHIHARA, Naotake NODA
Article type: Article
Pages
527-528
Published: September 23, 2003
Released on J-STAGE: August 01, 2017
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Sei UEDA, Yuichiro KANADA
Article type: Article
Pages
529-530
Published: September 23, 2003
Released on J-STAGE: August 01, 2017
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Kenji OONISHI, Yoshihiro OOTAO, Yoshinobu TANIGAWA
Article type: Article
Pages
531-532
Published: September 23, 2003
Released on J-STAGE: August 01, 2017
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In this study, the theoretical analysis of two-dimensional piezothermoelasticity is developed for a functionally graded piezoelectric strip (FGPS), 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-dimensional temperature change in a transient state. As an example, numerical calculations are carried out for FGPS, which material properties are estimated by the linear rule of mixture. Some numerical results for the temperature change, the displacement, the stress, and electric potential distributions when the thermoelastic is not controlled or controlled are shown in figures.
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Yasutomo UETSUJI, Takehiro SHIMOYAMA, Masaru ZAKO
Article type: Article
Pages
533-534
Published: September 23, 2003
Released on J-STAGE: August 01, 2017
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Koichi GODA, Tomonaga OKABE
Article type: Article
Pages
535-536
Published: September 23, 2003
Released on J-STAGE: August 01, 2017
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Seiichiro SAKATA, Fumihiro ASHIDA, Masaru ZAKO
Article type: Article
Pages
537-538
Published: September 23, 2003
Released on J-STAGE: August 01, 2017
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This paper describes a homogenization analysis of hollow fiber composite material. Generally a porous material has low thermal conductivity, but it is difficult to control both thermal and mechanical property because of difficulty on control of shape and location of holes in composite media. In this study, a homogenization analysis and transient heat conductivity analysis of a hollow fiber composite plate is carried out. Effect of microstructural design of hollow fiber on homogenized thermal and mechanical properties are also investigated. Numerical results illustrate validity of the analysis and necessity of the microstructural design of hollow fiber composite material.
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Yotsugi SHIBUYA
Article type: Article
Pages
539-540
Published: September 23, 2003
Released on J-STAGE: August 01, 2017
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Thermoplastic matrix of the composite has time-temperature dependent properties. For nonlinear properties of the matrix, a neural network model is used to represent those complex properties. The time-temperature superposition principle is known in viscoelastic properties, it is used to verify a neural network model. A homogenization theory with two-scale asymptotic expansion is used to homogenize the creep properties of the composite. Effective constitutive equations and microscopic disturbed displacements are derived from the homogenization theory. In numerical calculations, the effective creep compliance of the composite is determined by using the homogenization theory and predicted creep property of the matrix by neural network.
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Koichi KAIZU, Kiyohiko IKEDA
Article type: Article
Pages
541-542
Published: September 23, 2003
Released on J-STAGE: August 01, 2017
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Hiroki HANAWA, Kuniharu USHIJIMA, Dai heng CHEN
Article type: Article
Pages
543-544
Published: September 23, 2003
Released on J-STAGE: August 01, 2017
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Tomohito MATSUDA, Kuniharu USHIJIMA, Dai heng CHEN
Article type: Article
Pages
545-546
Published: September 23, 2003
Released on J-STAGE: August 01, 2017
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Mitsuhiro HAMADA, Kuniharu USHIJIMA, Dai heng CHEN
Article type: Article
Pages
547-548
Published: September 23, 2003
Released on J-STAGE: August 01, 2017
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Hidetoshi KOBAYASHI, Masashi DAIMARUYA, Taketoshi NOJIMA
Article type: Article
Pages
549-550
Published: September 23, 2003
Released on J-STAGE: August 01, 2017
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[in Japanese], [in Japanese]
Article type: Article
Pages
551-552
Published: September 23, 2003
Released on J-STAGE: August 01, 2017
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Kazumi WATANABE
Article type: Article
Pages
553-554
Published: September 23, 2003
Released on J-STAGE: August 01, 2017
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The present report considers the Doppler effect, in order to apply ultrasonic wave to detect the motion of a wall or boundary. Starting from the very basic formula of the Doppler effect, two elastodynamic problems of moving sources are discussed. They are uniform motion and back and forth motion. The conclusion states that it would be possible to detect the vibration frequency (or velocity) of a wall from the FFT data of received waves.
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Shiro BIWA, Satoshi Yamamoto, Nobutada OHNO
Article type: Article
Pages
555-556
Published: September 23, 2003
Released on J-STAGE: August 01, 2017
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Masahiro HIGUCHI, Ryuusuke KAWAMURA, Yoshinobu TANIGAWA
Article type: Article
Pages
557-558
Published: September 23, 2003
Released on J-STAGE: August 01, 2017
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In the present article, a theoretical treatment of dynamic behaviors for magnetothermoelastic stresses and deformation is dealt with in a conducting solid circular cylinder subjected to both internal heat generation due to eddy current loss and Lorentz force by cyclic time variation of magnetic field. Assuming that uniform magnetic field whose intensity varies sinusoidally with time acts on the cylinder in the direction parallel to its surface, plane axisymmetrical magnetic field and the associated eddy current in the cylinder due to electromagnetic induction have been formulated based on the theory of quasi-stationary electromagnetic field. Thereafter, dynamic behaviors of magnetothermoelastic stresses and deformation in a conducting solid cylinder, which are subjected to both plane axisymmetrical temperature change due to eddy current loss and Lorentz force, have been analyzed under the plane strain condition or generalized plane strain condition. Comparing numerical results of dynamic behaviors for magnetothermoelastic stresses and deformation in the cylinder with those of quasi-static one, an effect of frequency in cyclic time variation of magnetic field has been examined.
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Tomoaki TSUJI, Takumi Nakamura
Article type: Article
Pages
559-560
Published: September 23, 2003
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 FEM with the hyper-elastic material. As the initial condition, the cylinder is subjected to the hydrostatic tensile load and the outer surface is fixed. The inner surface of the cylinder is set to free at the time t=0. Then the radius of the inner surface is growing transiently. The time dependence of the inner radius is studied with the various values of the initial stretch at the outer surface.
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Yoshihiro SUGANO, Kenji YOSHIDA, Mamoru KIKUCHI, Fumihito NISHIMURA
Article type: Article
Pages
561-562
Published: September 23, 2003
Released on J-STAGE: August 01, 2017
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Keitaro SUEYOSHI, Koichi KAIZU, Kiyohiko IKEDA
Article type: Article
Pages
563-564
Published: September 23, 2003
Released on J-STAGE: August 01, 2017
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Wei LU, Yoshihiro TOMITA
Article type: Article
Pages
565-566
Published: September 23, 2003
Released on J-STAGE: August 01, 2017
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Yasuhiro NAKAMICHI, Michihiko NAKAGAKI, Hua jian CHANG
Article type: Article
Pages
567-568
Published: September 23, 2003
Released on J-STAGE: August 01, 2017
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Miwa SHINOHARA, Michihiko NAKAGAKI
Article type: Article
Pages
569-570
Published: September 23, 2003
Released on J-STAGE: August 01, 2017
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Hideo MIURA
Article type: Article
Pages
571-572
Published: September 23, 2003
Released on J-STAGE: August 01, 2017
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Yoshiharu Kanegae, Hiroshi Moriya, Tomio Iwasaki
Article type: Article
Pages
573-574
Published: September 23, 2003
Released on J-STAGE: August 01, 2017
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Takao MIYAKE, Satoshi IZUMI, Shinsuke SAKAI
Article type: Article
Pages
575-576
Published: September 23, 2003
Released on J-STAGE: August 01, 2017
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In semiconductor devices, it is known that electrical failures are caused by the generation of dislocation. However, observation of its behavior is difficult due to its small size. Therefore, dislocation dynamics is useful for investigating the generation and propagation of the dislocation. In this paper, we have developed dislocation dynamics simulator and applied it to the semiconductor device with the stress field associated with the intrinsic stress of silicon-nitride thin film. We can reproduce the dependence of the dislocation generation on temperature by using the 2D simulation, and in addition, on oxygen concentration by using the 3D simulation.
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Yukihiro KUMAGAI, Hiroyuki OHTA, Hideo MIURA, Akihiro SHIMIZU
Article type: Article
Pages
577-578
Published: September 23, 2003
Released on J-STAGE: August 01, 2017
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Tomio Iwasaki
Article type: Article
Pages
579-581
Published: September 23, 2003
Released on J-STAGE: August 01, 2017
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Yoshio ARAI, Eiichiro TSUCHIDA, Kazunari OZASA, Akihiko YAMANE
Article type: Article
Pages
583-584
Published: September 23, 2003
Released on J-STAGE: August 01, 2017
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Takashi SUMIGAWA, Hiroyuki OHTA
Article type: Article
Pages
585-586
Published: September 23, 2003
Released on J-STAGE: August 01, 2017
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Akihisa HASHIMOTO, Yoshikazu NAKAI
Article type: Article
Pages
587-588
Published: September 23, 2003
Released on J-STAGE: August 01, 2017
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Hironori TOHMYOH, Tsuyoshi AKAOGI, Masumi SAKA
Article type: Article
Pages
589-590
Published: September 23, 2003
Released on J-STAGE: August 01, 2017
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