| Abstract: | The load-strain-deflection characteristics of a tapered-thickness cantilever aluminum plate representing a Naflex seal geometry were evaluated by means of high-elongation strain gages, high- and low-sensitivity photoelastic coatings and dial gages. Load was achieved by a deflection of the free end, constant across the width, and measured by a strain-gaged load cell. After deflection to approximately 5-percent tensile strain, the loading was reversed until approximately 5-percent compressive strain had been reached beyond the original position, then reversed again and loaded to approximately 10-percent tensile strain. The plane-stress to plane-strain transition, traversing from the edge of the plate, occurred quite rapidly for both elastic and plastic strains. The influence of the Bauschinger effect on the load-deflection relationship was pronounced. |
