Visco-elastic properties under forced vibrations are of importance for elastomers under periodically dynamic stress. Plotted in a stress-deformation diagram, one obtains the shape of an ellipse. The area of the ellipse shows the damping, i.e. the amount of mechanical energy that is converted into heat during each deformation cycle in the elastomer. The amount of heat that cannot be dissipated to the outside heats up the rubber part. Critical values can be achieved at high load change frequencies and large amplitudes.
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