Creep Behavior of Silicone Rubber at Different Temperatures and Establishment of Viscoelastic Parameter Model with Variable Temperature

Creep tests of silicone rubber at different temperatures (-20,-5,10,25,40 ℃) were carried out. The test results were fitted and analyzed through the three-parameter solid model and the Burgers model, and viscoelastic parameters at different temperatures were obtained. The prediction model of silicone rubber viscoelastic parameters at variable temperatures was established based on the three-parameter solid model and dimensionless analysis method. The results show that the creep behavior of silicone rubber had obvious correlation with the temperature; its creep strain and creep rate increased gradually with temperature. The three-parameter solid model described the static creep characteristics of silicone rubber at different temperatures more accurately than Burgers model did. The viscoelastic parameter prediction model based on three-parameter solid model and dimensionless analysis method had high prediction accuracy, and the prediction results were in good agreement with the test results.