Abstract
The dynamic mechanical behavior of rubber material has been investigated for the principle loading modes; tensile, compressive and shearing. For each loading mode, specimens were subjected to sinusoidal cyclic loadings at two different mean strain states and two different frequency values. Each specimen has experienced 100K cyclic sinusoidal loading under the corresponding mean strain state and frequency. The amplitudes for cyclic loadings have been kept constant through the tests. Dynamic characterization tests were subjected to the specimens at an interval of 10K cycles during the cyclic loading tests. Dynamic characterization tests are also performed at the same mean strain states; however, the frequency value is swept between 1 and 101 Hz by a step size of 5 Hz. Also the dynamic load amplitude is continuously reduced as the frequency is increased in order to minimize the measurement errors at higher frequency values. The results are presented by means of comparative graphs. Curves are fit using appropriate functions to use the information gained experimentally in the finite element calculations. A methodology has been presented to estimate the dynamic mechanical behavior of vibration isolators which are produced from natural rubber and subjected to single mode loading.
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