Characterization Study of Rubber-Plastic Composite Materials for Deep Submergence Sonar Baffles.

摘要

Load vs deflection tests in flexure were made on rubber-plastic composite materials intended for deep submergence sonar baffles, as part of the project to characterize the mechanical and acoustical properties of these materials. The specimens consisted of a two layered composite, a four layered composite, the rubber and plastic components by themselves and two and four parallel layers of the plastic component separated at the specimen supports only by strips of rubber material having the same thickness as in the two and four layered composites, respectively. Analysis of the load-deflection data indicated that the rubber layer by itself had little load bearing capacity. In a composite, the rubber layers contribute to load bearing capacity by keeping the layers of plastic apart and further away from the neutral axis. However, the composite specimens did not behave as conventional beams because of the low shearing rigidity and high compression under load of the relatively soft rubber layers.