不同温度下硅橡胶蠕变行为及变温黏弹性参数模型的建立

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

在不同温度(-20,-5,10,25,40℃)下对硅橡胶进行蠕变试验,采用三参数固体模型和Burgers模型对试验结果进行拟合,得到了不同温度下的黏弹性参数;基于三参数固体模型及无量纲分析方法,建立了硅橡胶变温黏弹性参数预测模型。结果表明:硅橡胶的蠕变行为与温度具有明显相关性,随着温度的升高,其蠕变应变和蠕变速率均逐渐增大;与Burgers模型相比,三参数固体模型能够更准确地描述硅橡胶在不同温度下的静态蠕变行为;基于三参数固体模型及无量纲分析方法建立的黏弹性参数预测模型具有较高的预测精度,预测结果与试验结果吻合较好。

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.