抄録
In this paper, a computational prediction method of the compression set of EP-rubber O-rings was proposed. As the prediction method, the finite element analysis code using thermo-mechanical viscoelastic model was developed. The material model consisted of viscoelastic elements connected in parallel. A viscoelastic element consisted of a hyper elastic spring and a viscous damper, which were connected in series. The relationship between relaxation times and temperature for the viscous characteristics of this model were calculated using the Arrhenius equation. This model is possible to perform the elastic strain which is generated by stress reduction. The boundary conditions of the FEM simulation were supposed that rubber O-rings were in the two flat plates and in the groove and lid. Surface contact algorithm with penalty function was applied to the FEM code.
