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Article type: Research Article
Authors: Kwon, Y.W. | Bergersen, J.K. | Shin, Y.S.
Affiliations: Mechanical Engineering Department, Naval Postgraduate School, Monterey, CA 93943
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.
DOI: 10.3233/SAV-1994-1305
Journal: Shock and Vibration, vol. 1, no. 3, pp. 253-265, 1994
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