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Yoshihito OZAWA, Hideki SEKINE, Osamu TAMATE
1985 Volume 51 Issue 470 Pages
2249-2255
Published: October 25, 1985
Released on J-STAGE: February 21, 2008
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Masamichi TAKEUCHI, Tetsuo SHOJI, Hideaki TAKAHASHI, Takeshi ANAYAMA
1985 Volume 51 Issue 470 Pages
2256-2264
Published: October 25, 1985
Released on J-STAGE: February 21, 2008
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Hideyuki OTAKI, Yoshio ISHIKAWA, Kazuhiko ITO
1985 Volume 51 Issue 470 Pages
2265-2273
Published: October 25, 1985
Released on J-STAGE: February 21, 2008
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Michio KURASHIGE
1985 Volume 51 Issue 470 Pages
2274-2280
Published: October 25, 1985
Released on J-STAGE: February 21, 2008
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Michiaki KOBAYASHI
1985 Volume 51 Issue 470 Pages
2281-2292
Published: October 25, 1985
Released on J-STAGE: February 21, 2008
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Kosuke NAGAYA
1985 Volume 51 Issue 470 Pages
2293-2302
Published: October 25, 1985
Released on J-STAGE: February 21, 2008
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Masashi SATO, Kosuke NAGAYA, Sadahiko TAKEDA, Yukio MATSUMOTO, Noriyuk ...
1985 Volume 51 Issue 470 Pages
2303-2308
Published: October 25, 1985
Released on J-STAGE: February 21, 2008
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Kyosuke ONO
1985 Volume 51 Issue 470 Pages
2309-2316
Published: October 25, 1985
Released on J-STAGE: February 21, 2008
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Naoki ASANO
1985 Volume 51 Issue 470 Pages
2317-2326
Published: October 25, 1985
Released on J-STAGE: February 21, 2008
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Norio KAMIYA, Yutaka SAWAKI
1985 Volume 51 Issue 470 Pages
2327-2333
Published: October 25, 1985
Released on J-STAGE: February 21, 2008
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Koichiro KAWASHIMA, Yoshinori NAKAYAMA, Susumu OTSUKA, Masao IKEDA
1985 Volume 51 Issue 470 Pages
2334-2340
Published: October 25, 1985
Released on J-STAGE: February 21, 2008
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Hiroo OKADA, Satoshi MATSUZAKI, Yoshisada MUROTSU
1985 Volume 51 Issue 470 Pages
2341-2348
Published: October 25, 1985
Released on J-STAGE: February 21, 2008
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Nobutada OHNO, Yoshifumi KACHI, Sumio MURAKAMI
1985 Volume 51 Issue 470 Pages
2349-2358
Published: October 25, 1985
Released on J-STAGE: February 21, 2008
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Koji FUKATSU, Koichiro KAWASHIMA, Masanobu ODA
1985 Volume 51 Issue 470 Pages
2359-2367
Published: October 25, 1985
Released on J-STAGE: February 21, 2008
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Masahiro ICHIKAWA
1985 Volume 51 Issue 470 Pages
2368-2376
Published: October 25, 1985
Released on J-STAGE: February 21, 2008
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Mamoru IMURA, Masami TAKIMOTO, Takeo SHIOJIMA, Masataka TANAKA
1985 Volume 51 Issue 470 Pages
2377-2383
Published: October 25, 1985
Released on J-STAGE: February 21, 2008
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Viscoelastic analysis is one of the most important subjects in engineering. Several attempts have been so far made for the integral equation approach to viscoelastic problems. To authors' knowlege, however, there is no available literature for the application of a more direct boundary element method to the time dependent problems of this kind using a step-wise time integration scheme. In this paper, we propose a direct boundary integral formulation. This formulation needs only Kelvin's fundamental solution of isotropic elastostatics with material constants prescribed as explicit functions of time. Successive application of this solution scheme can determine the whole behavior of viscoelastic problems. Finally, some sample problems of viscoelastic materials are computed by means of the proposed method of solution to demonstrate its potential usefulness.
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Takuya SEMBA, Yasuhiro TANI, Hisayoshi SATO
1985 Volume 51 Issue 470 Pages
2384-2391
Published: October 25, 1985
Released on J-STAGE: February 21, 2008
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Special schemes for numerical integrations to overcome singularities of integrants are required to be developed so that the numerical solutions with sufficient accuracy may be generally obtained by the conventional Boundary Element Method (BEM). In this paper, the investigation is made to improve the accuracy and the efficiency on linear elastic and thermo-elastic BEM. Namely, the comparison between the numerical results derived by the double exponential formula and by the high-ordered Legendre-Gauss formulae is shown on source points which are very close to the boundary element. It is made obvious that sufficiently accurate solutions can be obtained with better efficiency than that by the conventional method by adopting integral domain which can eraze the positive and the negative symmetry of integrants.
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Atsumi OHTSUKI
1985 Volume 51 Issue 470 Pages
2392-2396
Published: October 25, 1985
Released on J-STAGE: February 21, 2008
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In symmetrical four-point bending, the problem of nonlinear large deflections of a thin elastic beam in the presence of friction at loading supports is investigate analytically by applying the Legendre-Jacobi's elliptic integrals of the first and second kinds. Moreover, the reduction factors are presented to estimate easily the maximum deflection, end slope and maximum bending stress in large flexural states. The experiment is made in order to confirm the applicability of the proposed large deflection theory and the experimental results agree well with the theoretical ones.
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Masahiro ICHIKAWA
1985 Volume 51 Issue 470 Pages
2397-2402
Published: October 25, 1985
Released on J-STAGE: February 21, 2008
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With respect to the application of the three-parameter Weibull distribution to the reliability analysis of ceramics under multi-axial stress, the following two fundamental problems are studied theoretically; (1) whether the three-parameter Weibull distribution function holds through various different stress states without contradiction, and (2) whether the shape parameter (Weibull modulus) takes the same value independent of the stress states even if the three-parameter Weibull distribution, it is shown that the same type of distributions can be derived for the uniaxial stress state and the equibiaxial stress state. However, the shape parameter takes different values depending on the stress state. The location parameter is the same independent of the stress state.
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Yoichi OBATAYA, Shinobu KOHNO
1985 Volume 51 Issue 470 Pages
2403-2410
Published: October 25, 1985
Released on J-STAGE: February 21, 2008
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A new approach to describe the Bausuchinger curves for metals is presented by means of the concept of the field of resisting force against the movement of dislocations. In previous papers, it has been clarified that the cyclic plasticity model, proposed by the authors based on this concept, could be applicable to the quantitative descriptions of the various cyclic deformation phenomena in the steady state, and the tensile stress-strain curves with a different type of yielding. In this paper, the Bauschinger curve can be expressed by applying this concept with some assumptions of the changes in the field of resisting force caused by pre-loading. This has provided satisfactory agreement with each experimental curve for carbon steel and brass with a wide range of strain.
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Yasuo SATO, Atushi HASHIMOTO, Takashi ARISUMI
1985 Volume 51 Issue 470 Pages
2411-2417
Published: October 25, 1985
Released on J-STAGE: February 21, 2008
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In order to investigate the optimum section of beam, the criterion for rupture of beam with unsymmetrical section is proposed, and it is shown that the rupture of graphite beam with unsymmetrical I-section can be accounted for by the criterion. Let n be the ratio of the distance between the outermost layer on tension side and the neutral axis to the height of the beam, the criterion is as follows. (1) For the beam with n > 0.5, [numerical formula] where σ^
- is the modified mean stress taken over the section, σ
s is the stress at outermost layer on tension side, σ
b is the tensile strength of the material. (2) For the beam with n < 0.5, [numerical formula] where σ^
-t is the modified mean stress on the section of tension side.
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Masao SHIBAHARA, Masahiro YAMADA
1985 Volume 51 Issue 470 Pages
2418-2421
Published: October 25, 1985
Released on J-STAGE: February 21, 2008
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Using the specimens of the orthotropic materials made of resin mortar and oriented fiber glass, the member with a notch in the mid span was subjected to three-point impact bending, then the crack initiated and it had fractured. On the process the position of the crack tip and the dynamical stress intensity factor were determined by means of photoelastic coating method using the image converter camera IMACON-790. The specimens with variant anisotropic direction were experimented, and the resulting superposition showed how the variation of the crack propagation velocity and the dynamical stress intensity factor differed with anisotropic direction. Then, the influence of anisotropic on the fracture behavior was made clear.
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