Aeronautical and Space Sciences Japan
Online ISSN : 2424-1369
Print ISSN : 0021-4663
ISSN-L : 0021-4663
Volume 26, Issue 296
Displaying 1-6 of 6 articles from this issue
  • Kuninori UESUGI
    1978 Volume 26 Issue 296 Pages 433-440
    Published: September 05, 1978
    Released on J-STAGE: May 25, 2009
    JOURNAL FREE ACCESS
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  • Shoichi TAKAYAMA
    1978 Volume 26 Issue 296 Pages 440-453
    Published: September 05, 1978
    Released on J-STAGE: May 25, 2009
    JOURNAL FREE ACCESS
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  • Kiro HONJO
    1978 Volume 26 Issue 296 Pages 454-462
    Published: September 05, 1978
    Released on J-STAGE: January 13, 2010
    JOURNAL FREE ACCESS
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  • Motoki HINADA
    1978 Volume 26 Issue 296 Pages 462-470
    Published: September 05, 1978
    Released on J-STAGE: May 25, 2009
    JOURNAL FREE ACCESS
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  • Masuji UEMURA, Hisashi IYAMA, Yoshiko YAMAGUCHI
    1978 Volume 26 Issue 296 Pages 471-479
    Published: September 05, 1978
    Released on J-STAGE: May 25, 2009
    JOURNAL FREE ACCESS
    The thermal expansion coefficients (α) of unidirectional reinforced plastics are obtained easily and precisely by the use of explicit algebraic formulae which are functions of thermal and elastic properties of the two constituent materials and of their volume fractions. They are derived by considering uniformly spaced circular anisotropic fibers arranged in a hexagonal array in an elastic matrix. Then the analytical formulae for the thermal expansion coefficients and the residual stresses in filament-wound and laminated composites are given under the assumption of elastic behavior and within the framework of the laminated plate theory.
    The experiments on carbon fiber/epoxy laminated composite cylinders which are reinforced by helical and circumferential windings show a good agreement with the calculated values. The residual stresses induced during the curing process are found not to be negligible compared with the weak tensile strength normal to fibers. The algebraic formulations for α together with those for elastic moduli and failure criterion proposed by one of the authors seem to be useful for the optimal design of laminated composite structures in a closed form which elucidate the effects of various sorts of constitutive parameters.
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  • Zensaburo YASUTOMI, Yoshihiro MIYAI, Rinichi MURAO
    1978 Volume 26 Issue 296 Pages 479-487
    Published: September 05, 1978
    Released on J-STAGE: May 25, 2009
    JOURNAL FREE ACCESS
    The purpose of this paper is to present a detailed study of the forward speed effect to the cushion pressure characteristics of ACV's, from the both theoretical and experimental points of view.
    The experiments are performed for a two-dimensional rectangular-shaped model in a wind tunnel with a moving ground, and theoretical calculations are carried out by using the momentum theory in the case of the subcritical and supercritical forward speed, The main conclusion are summarized as follows:
    1) Experimental results were predicted by the present momentum theory.
    2) The cushion pressure in the diffusion region is much less than that in channel flow region.
    3) However, even in the channel flow region, the pressure slightly rise up with the downstream. This is caused by the friction-pump effect of the moving ground.
    4) The rear ambient pressure affects into the cushion pressure remarkably, that is, as this pressure increase negatively, the cushion pressure is reduced, with the negative increase of the rear ambient pressure.
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