Study on Coupling Effect of Heat Source and Load Holding and Fitting Performance of Rubber Material

Abstract

As an important part of the isolation bearing, the rubber material is often closely related to the heat source. The study on the whole bearing also shows that the influence of temperature on the performance of the bearing cannot be ignored. In the actual use process, rubber isolation bearing is often subject to the coupling effect of heat source and load holding. At present, there is a lack of research data on rubber mechanical properties under the cross-influence of both, so the degree of mechanical properties degradation of the bearing is unknown. In this chapter, the vulcanized rubber material inside the spacer is taken as the research object, the thermal stability of the material is investigated by thermogravimetric test, and the pyrolysis temperature of the material is determined. Temperature conditions were determined according to the pre-pyrolysis temperature of rubber materials, uniaxial tensile tests were carried out on dumbbell rubber and rubber samples after coupling treatment with high temperature and load, and the changes in tensile properties of rubber materials under the coupling effect of heat source and load holding were investigated, which provided a reference for establishing the constitutive model of rubber materials under relevant influences. In addition, SEM tests were conducted on the tensile section of rubber samples. The degradation mechanism of rubber tensile properties was further analyzed by observing the change of the micromorphology of rubber materials.