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Effect of Surface Coatings on Cylinders Exposed to Underwater Shock

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Author
Kwon, Y.W.
Bergersen, J.K.
Shin, Y.S.
Date
1994
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Abstract
The response of a coated cylinder (metallic cylinder coated with a rubber material) subjected to an underwater explosion is analyzed numerically. The dynamic response of the coated cylinder appears to be adversely affected when impacted by an underwater shock wave under certain conditions of geometry and material properties of the coating. When adversely affected, significant deviations in values of axial stress, hoop stress, and strain are observed. The coated cylinder exhibits a larger deformation and higher internal energy in the metallic material. Rubber coatings appeared to inhibit energy dissipation from the metallic material to the surrounding water medium. A parametric study of various coatings was performed on both aluminum and steel cylinders. The adverse effect of the coating decreased when the stiffness of the rubber layer increased, indicating the existence of a threshold value. The results of this study indicate that the stiffness of the coating is a critical factor to the shock hardening of the coated cylinder.
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This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
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http://hdl.handle.net/10945/49517
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  • Thumbnail

    Effect of surface coating on cylinders subjected to underwater shock 

    Bergersen, John K. (Monterey, California. Naval Postgraduate School, 1992-09);
    The response of a composite cylinder (metallic cylinder coated with a rubber material) subjected to an underwater explosion was analyzed numerically. Qualitative differences between coated and uncoated cylinders were ...
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    Effect of surface coating on one-dimensional system subjected to unit step pressure wave 

    Kwon, Young W.; Shin, Y. S.; Brasek, Thomas Peyton (Monterey, California. Naval Postgraduate School, 1994-09); NPS-ME-94-006
    The response of a one-dimensional, coated, aluminum structure subjected to a unit step pressure wave is studied. The coating is either an elastic material or a viscoelastic tread stock rubber of variable stiffness; it ...
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    Response of dual-layered structures subjected to shock pressure wave 

    Brasek, Thomas Peyton (Monterey, California. Naval Postgraduate School, 1994-12);
    The response of coated, metallic structures subjected to shock pressure waves is studied. The coating is either an elastic material or nearly incompressible rubber of variable stiffness separating the structure from an air ...
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