<div class="description">
<p>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 investigated. The dynamic response of the coated cylinder was found 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 axial and hoop stress and strain values were observed. The coated cylinder exhibited larger effective plastic strain and higher residual internal energy in thp 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 effects of the coating decreased when the shear modulus of the rubber was increased or when the rubber thickness was increased, indicating the existence of threshold values for these parameters. The results of this study indicate that the stiffness of the coating is a critical factor involving these threshold values.
</p>
<br>Subjects: Cylinders;Testing;Shock waves</div>
<div class="fn value">
Bergersen, John K.</div>
Internet Archive identifier