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.
Highlights
The dynamic response of a structure to an underwater explosion is a complex problem due to the interaction between the fluid and structure
Instead of a gradual release of energy into the surrounding water medium, most of the energy was retained in the metal material
Cylinder response was most influenced by changes in rubber shear modulus and rubber thickness
Summary
The dynamic response of a structure to an underwater explosion is a complex problem due to the interaction between the fluid and structure. An early work (Geers 1975) showed that resilient scatterers can attenuate the near-field pressure if they behave like a cavity-like boundary. Such an attenuation will certainly change the dynamic response of the structure. The objective of this study was to examine the response of a metal cylinder coated with a rubber material, when subjected to an underwater explosion, utilizing a numerical analysis technique. Rubber coated aluminum and steel cylinders were analyzed and a parametric study of various coatings was performed to gain a better understanding of the coating effect on the structure.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
