Response of dual-layered structures subjected to shock pressure wave
By: by T.P. Brasek, Y.W. Kwon, Y.S. Shin
Contributors: Kwon, Young W.; Shin, Y. S.; Naval Postgraduate School (U.S.). Dept. of Mechanical Engineering
Publisher: Naval Postgraduate School; Available from National Technical Information Service
Published: 1994
Place of publication: Monterey, Calif; Springfield, Va
Language: eng
Number of pages: 73
Subjects: ALUMINUM COATINGS; RUBBER COATINGS; UNDERWATER EXPLOSIONS; SHOCK WAVES
Other titles: NPS-ME-94-007.
Description: 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.
Notes: Cover title.

"NPS-ME-94-007."

"October 1, 1994 - December 31, 1994."

AD-A289 355.

Includes bibliographical references (p. 71).

aq/aq cc:9116 05/09/97