Journal of High Pressure Institute of Japan
Online ISSN : 1347-9598
Print ISSN : 0387-0154
ISSN-L : 0387-0154
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Volume 24, Issue 2
Displaying 1-5 of 5 articles from this issue
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  • Effect of Axial Compressive Load on Bulge Forming
    Yuuji YOSHITOMI, Hideaki KAMOHARA, Takashi SHIMAGUCHI, Hiroshi NOMURA
    1986 Volume 24 Issue 2 Pages 55-61
    Published: March 25, 1986
    Released on J-STAGE: August 05, 2010
    DOIhttps://doi.org/10.11181/hpi1972.24.55
    JOURNAL FREE ACCESS
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    A bulge forming method has been applied to form the structural machine parts, since high reliability in strength can be achieved by the method. However, an amount of thickness reduction in the method has to be estimated.
    There has been increasing interest in the development of a simulation system of a plastic forming process, and it is important to understand the plastic deformation behavior during the bulge forming process.
    A study has been made of the formation behavior and the strain distribution in an axial symmetrical model in the bulge forming process experimentally.
    It was clear from the results that the axial compressive load prevents the thickness reduction, and this effect was evaluated quantitativery.
    It was also found that the forming pressure could be decreased with applying the axial compressive load.
    As the result it was made easy to control the thickness reduction and determine the forming conditions. It is expected that greater accuracy of the simulation in the bulge forming process can be obtained when data base is established based on these results.
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  • Deformation of Cylindrical Vessel under Explosive Pressure
    Shinji YOSHIE, Masaki SAITO
    1986 Volume 24 Issue 2 Pages 62-69
    Published: March 25, 1986
    Released on J-STAGE: August 05, 2010
    DOIhttps://doi.org/10.11181/hpi1972.24.62
    JOURNAL FREE ACCESS
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    This study is one of the research and developments for confirming the safety margin of structural integrity in nuclear power plants called the Shock Structural Test. The objective of this study is to simulate the dynamic structural behavior of a reactor vessel model under a hypothetical core disruptive accident.
    In this paper, energy partition among various components in the vessel and the deformation mechanism of the vessel with cover gas volume are discussed based on the experimental data such as pressure and strain histories and their peak values due to slug impact.
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  • On Recent Three Meetings in U. S. A. Concerning the Integrity of Primary Loop Components of Light Water Reactors
    Genki YAGAWA
    1986 Volume 24 Issue 2 Pages 70-76
    Published: March 25, 1986
    Released on J-STAGE: August 05, 2010
    DOIhttps://doi.org/10.11181/hpi1972.24.70
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    The paper contains the State-of-the-Arts of the Integrity Researches, particularly those of U. S. A., regarding the Primary Components of Light Water Reactors.
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  • Noncubic Hexahedral Anvil Type Pressure Apparatus
    Motoyuki NOMURA
    1986 Volume 24 Issue 2 Pages 78-86
    Published: March 25, 1986
    Released on J-STAGE: August 05, 2010
    DOIhttps://doi.org/10.11181/hpi1972.24.78
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    Without any loss of the pressure generated the possibility of the enlargement of the pressure chamber of the noncubic hexahedral anvil type pressure apparatus is proposed under the condition of the isotropic compression. According to this proposal the prolate tetragonal anvil apparatus was actually manufactured by modifying the cubic anvil apparatus, and it was confirmed that the efficiency for the pressure generation was slightly increased in the new device. The isotropy or uniformness of the compression of the pressure medium was, however, deteriorated compared with the original cubic anvil apparatus. Comments on the noncubic hexahedral anvil apparatus of general type are also given.
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  • Organization and Activities of WRC/PVRC
    Kunio NARITA
    1986 Volume 24 Issue 2 Pages 87-95
    Published: March 25, 1986
    Released on J-STAGE: August 05, 2010
    DOIhttps://doi.org/10.11181/hpi1972.24.87
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    The Japan Pressure Vessel Research Council (JPVRC) was established, just after the 3rd International Conference on Pressure Vessel Technology (ICPVT 3), 1977 in Tokyo, The JPVRC is working with close cooperation with WRC/PVRC. The research activities of WRC/PVRC are mainly supported by 3 divisions, namely material, design and fabrication division. Each division is composed of many subcommittees and task groups. The organization and activities of WRC/PVRC are outlined based on WRC Annual Repport 1985/1986 and Long Range Plan for Pressure Vessel Research, 7th Edition.
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