Journal of High Pressure Institute of Japan
Online ISSN : 1347-9598
Print ISSN : 0387-0154
ISSN-L : 0387-0154
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Volume 35, Issue 3
Displaying 1-8 of 8 articles from this issue
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  • The use of All Composite CNG Tank for the Light Duty Passenger Car
    Sakuji ARAI
    1997 Volume 35 Issue 3 Pages 116-119
    Published: May 25, 1997
    Released on J-STAGE: August 05, 2010
    DOIhttps://doi.org/10.11181/hpi1972.35.116
    JOURNAL FREE ACCESS
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  • Fuel Cylinder For Natural Gas Commercial Vehicles
    Kazuo TAKASE
    1997 Volume 35 Issue 3 Pages 120-124
    Published: May 25, 1997
    Released on J-STAGE: August 05, 2010
    DOIhttps://doi.org/10.11181/hpi1972.35.120
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    As a solution to the global environmental problem, which is partly affected by vehicles, we are proceeding with the development of low-emission vehicles using alternative energy. Furthermore, it will certainly become necessary to realize low co2. To protect the global environment from pollution, there is much room for improvement with the current level of low-emission vehicles, including relatedeconomic efficiency. Under such circumstancrs, we could contribute to the preservation of the global environmnet through the introduction of CNG Vehicles. Epoch-makingly light fuel cylinder is indispensable for improvement of CNG commertial vehicles, espesially for 4 ton payload trucks and route buses.
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  • Progress of “Torayca” Carbon Fibers and Their Long Term Perfomance
    Takuji SATO
    1997 Volume 35 Issue 3 Pages 125-132
    Published: May 25, 1997
    Released on J-STAGE: August 05, 2010
    DOIhttps://doi.org/10.11181/hpi1972.35.125
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    This-article reviews development of PAN based carbon fibers, “Torayca”, primarily focusing on tensile strength, tensile modulus, and compressive strength improvements.
    The key technologies to improve tensile strength, tensile modulus, and compressive strength are to eliminate or minimize defects, to increase the degree of orientation for graphite crystals, and to restrain crystal growth with maintaining fiber modulus, respectively.
    Then this article briefly describes tensile and durability characteristics of carbon fiber reinforced plastics. It will be shown that carbon fiber reinforced plastics exhibit the best durability performance in long term environments.
    Also, the importance of control technology development for fiber/matrix interface which significantly influences mechanical properties of carbon fiber reinforced plastics is emphasized.
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  • Development of All-Composite CNG Pressure Vessels
    Polyethylene Liner Materials
    Masaru FUWA, Takefumi UEMATSU, Kazuhiko KAGAWA
    1997 Volume 35 Issue 3 Pages 133-141
    Published: May 25, 1997
    Released on J-STAGE: August 05, 2010
    DOIhttps://doi.org/10.11181/hpi1972.35.133
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    Compressed Natural Gas (CNG) is one of the most promising fuel candidates for low emission vehicles besides Electric Vehicles.
    Since CNG has high pressure as upto 3, 600 psi, the vessels for CNG requires not only pressure resistence but also lightness in order not to spoil the fual comsumption ability and the capacity of load transportation.
    Firstly aluminum liner which is reinforced with CFRP by filament winding process has been developed but recently all-composite pressure vessels with plastic liner have been developed at both America and Europe.
    This paper describes the approach in developing all-composite pressure vessels with Mitsubishi Chemical Corp. and the introduction of Polyethylene which has been chosen as the liner material.
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  • Interface Strength between Glass Fibers and Epoxy Resin Matrix
    Yuzuru SAKAI, Shinya SUZUKI, Hiroshi OHYA, Hiroshi WADA
    1997 Volume 35 Issue 3 Pages 142-149
    Published: May 25, 1997
    Released on J-STAGE: August 05, 2010
    DOIhttps://doi.org/10.11181/hpi1972.35.142
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    The strength of cohesive bonding at the interface between glass fibers and epoxy matrix was measured by using three types of specimens (tensile strength, shear strength and pull out strength specimens). It was noted that the strength of cohesive bonding was different among the types of glass fiber cloths and the types of strength test. Namely, the strength of cohesive bonding from tensile test was about 20% higher than from shear test, and the strength from pull-out test was about twice as large as from shear test. Bonding strength between roving cloth and matrix was measured by tensile test as 10.5MPa, which was about 15% larger than the values between glass cloth or choppedstrand mat and epoxy matrix.
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  • Evaluation of Creep Embrittlement Using Slow Extension Rate Tensile Testing for 1.25Cr-0.5Mo Steels
    Yasuo OTOGURO, Isao ITOH, Kiyohisa SUGII, Yukio TOMITA, Katsukuni HASH ...
    1997 Volume 35 Issue 3 Pages 150-158
    Published: May 25, 1997
    Released on J-STAGE: August 05, 2010
    DOIhttps://doi.org/10.11181/hpi1972.35.150
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    Creep embrittlement was evaluated for simulated HAZ (heat affected zone) of 1.25Cr-0.5Mo steel using SERT (slow extension rate tensile) testing.
    Good correspondence between evaluation of the embrittlement with SERT and that with creep rupture test was confirmed when PWHT condition and strain rate were properly selected.
    Under the above conditions the quantitative effect of impurities on the embrittlement was expressed by factor of elements in creep embrittlement equation.
    The factors of the impurities in the SERT test corresponded approximately to those in the creep rupture test except that of As.
    Moreover, it was found that tendency for creep embrittlement could be estimated by shape of load-strain diagram.
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  • Governing Mechanisms of the Joining procedure Without Heating and Pressuring and Effects of Surface Roughness on the Procedure
    Kunio TAKAHASHI, Tadao ONZAWA
    1997 Volume 35 Issue 3 Pages 159-164
    Published: May 25, 1997
    Released on J-STAGE: August 05, 2010
    DOIhttps://doi.org/10.11181/hpi1972.35.159
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    Increase of contact area during solid state bonding process is simulated by using a model which is quantitatively available. The dominant mechanisms for the perfect contact are obtained as a function of bonding paraneters. The boundary diffusion becomes more dominant at the lower bonding temperature or the lower bonding temperature or the lower bonding pressure. The time required for the perfect contact increases exponentially as the temperature and the pressure decrease. In case of the bonding procedure without heating and pressing, a initial surface roughness is significant for the perfect contact. Since the contact area prepared by such procedure is commonly small, the elastic deformation becomes significant. With the same manner as the theory of contact mechanics, the criterion of the surface roughness for the elastic perfect contact is deduced.
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  • Erratum to : High Efficiency TIG Welding Technique for 9% Nickel Steel
    1997 Volume 35 Issue 3 Pages 164
    Published: 1997
    Released on J-STAGE: August 05, 2010
    DOIhttps://doi.org/10.11181/hpi1972.35.3_164
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