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Response of dual-layered structures subjected to shock pressure wave

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Author
Brasek, Thomas Peyton
Kwon, Young W.
Shin, Y. S.
Date
1994-10
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Abstract
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 or water medium. The stress, nodal velocity, and internal energy of the coated structure are compared to a system without a coating (homogeneous system) to examine the effect of various coating types and configurations on the response of the structure to shock conditions. The results show that a mismatch of impedance, pc0, between the coating and structure governs the degree of energy exchange between the coating and structure at the interface. The impedance mismatch between the structure and a rubber coating at the threshold value is termed the critical difference. If the impedance mismatch exceeds the critical difference, the dynamic response will be more adverse. A softer coating generally has a smaller impedance and tends to concentrate stress wave energy in the underlying structure
URI
http://hdl.handle.net/10945/28805
NPS Report Number
NPS-ME-94-007
Collections
  • All Technical Reports Collection
  • Mechanical Engineering (NPS-ME)

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  • Thumbnail

    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 ...
  • Thumbnail

    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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    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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