抄録
Nanoindentation test was carried out using TMA with Berkovich indenter to evaluate the viscoelastic characteristics of a gasket containing PTFE. The time-temperature superposition principle using W.L.F equation was applied to obtain the master curve of the creep compliance of gasket material at elevated temperature. The elastic-viscoelastic correspondence principle was also applied to estimate the gasket creep strain in the flanges from the master curve of the creep compliance. Gasket creep strain rate can be estimated at an elevated temperature for a long term of 10^5 hours. Estimation of the gasket creep strain rate in the flanges at 140℃ shows a good agreement with the experiment data obtained by the HPIS Z105 test procedure.
