Journal of the Japan Society for Composite Materials
Online ISSN : 1884-8559
Print ISSN : 0385-2563
ISSN-L : 0385-2563
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Volume 6, Issue 4
Displaying 1-7 of 7 articles from this issue
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  • [title in Japanese]
    Hirobumi TANAKA, Kiyotsugu YAMADA
    1980 Volume 6 Issue 4 Pages 129-137
    Published: October 31, 1980
    Released on J-STAGE: August 11, 2009
    DOIhttps://doi.org/10.6089/jscm.6.129
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1980 Volume 6 Issue 4 Pages 137a
    Published: October 31, 1980
    Released on J-STAGE: August 11, 2009
    DOIhttps://doi.org/10.6089/jscm.6.137a
    JOURNAL FREE ACCESS
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  • Experimental Determination of In-plane Shear Stress-Strain Relation and Estimation of Non-linear TensileBehaviors of Glass Fabric Reinforced Plastic Laminates
    O. HAGA
    1980 Volume 6 Issue 4 Pages 138-144
    Published: October 31, 1980
    Released on J-STAGE: August 11, 2009
    DOIhttps://doi.org/10.6089/jscm.6.138
    JOURNAL FREE ACCESS
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    In order to obtain the in-plane shear stress-strain relations of Glass Fabric Reinforced Plastic Laminates (GFRP laminates) the following three experimental methods are considered : 1) Uniaxial tensile test at the angle of 45° to the warps of a fabric. (Petit and Rosen's method.) 2) Pure shearing test with the combined biaxial tension-compression testing machine designed by the author. 3) Torsion test with a tubular specimen. The experimental results show that the 45°tensile test is effective to obtain easily the in-plane shear stress-strain relations of a GFRP laminate. Non-linear tensile stress-strain relationships are derived by using these inplane shear stress-strain relations and the stress-dependent elastic moduli reported in the previous paper. Uniaxial and biaxial tensile tests are carried out under constant stress ratios in the 15, 30 and 45° directions to the warps of the fabrics. The calculated values agree fairly well with the experimental results.
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  • Fracture Behaviour of Flake Reinforced AS by Falling Ball Impact Test
    K. OKUNO
    1980 Volume 6 Issue 4 Pages 145-151
    Published: October 31, 1980
    Released on J-STAGE: August 11, 2009
    DOIhttps://doi.org/10.6089/jscm.6.145
    JOURNAL FREE ACCESS
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    Fracture energy and crack length of AS composites with plane oriented planar reinforcements (glass flake, mica) were investigated by falling ball impact test. The results were compared with those of glass fiber and glass bead filled AS. The main results obtained are as follows : 1) The fracture energy of glass flake composites is higher than that of glass fiber and glass bead composites with equal diameter of the reinforcements. The higher fracture energy of the flake composite is considered to be due to the two dimensional reinforcing effect of flakes. 2) The energy required to increase the length of cracks was measured and the results were compared with the Kelly's equation (fiber composite) and the modified Kelly's equation (flake composite) assuming the falling ball energy is absorbed by the pull out of reinforcements from the matrix. Good agreements were obtained between the experimental data and the theoretical predictions.
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  • Strength and Molding Method of Fiber Reinforced Upper Complete Denture Bases
    H. MIYAIRI, M. NAGAI, H. FUKUDA, A. MURAMATSU, Y. TAKAYAMA
    1980 Volume 6 Issue 4 Pages 152-157
    Published: October 31, 1980
    Released on J-STAGE: August 11, 2009
    DOIhttps://doi.org/10.6089/jscm.6.152
    JOURNAL FREE ACCESS
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    The fiber-reinforced upper complete denture base was studied to improve the mechanical properties and the performance of the molding of acrylic resin denture base. The carbon and the organic fibers were used to reinforce the upper acrylic resin complete denture bases which are brought about the most high frequency of fracture. The positions of reinforcement were respectively near the front teeth and the palatal area of upper complete denture base. The purpose of such the studies is to strengthen the upper denture base of which the thickness of palatal area is thin. As the applied load on the denture base was assumed as the flexural de formation of the denture base, the four-point loading system was adoptted for these tests. Then, the strain destribution and the stiffness of denture base were examined, and the effec tiveness of reinforcement for the fiber-reinforced denture bases were investigated. And so the flexural deformation and fracture of the upper complete denture base caused with the occlusal force were basically considered, and the progress of fracture and the fracture modes of the denture base were examined.
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  • [title in Japanese]
    Yoshiaki YAMADA, Hidehito OKUMURA
    1980 Volume 6 Issue 4 Pages 158-164
    Published: October 31, 1980
    Released on J-STAGE: August 11, 2009
    DOIhttps://doi.org/10.6089/jscm.6.158
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    1980 Volume 6 Issue 4 Pages 165-167
    Published: October 31, 1980
    Released on J-STAGE: February 08, 2010
    DOIhttps://doi.org/10.6089/jscm.6.165
    JOURNAL FREE ACCESS
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