... with time depending on the creep properties and the stiffness of the housing. Assessing relaxation is a key parameter in determining the tightness performance of a valve stem packing over time. An analytical model based on the packing viscoelastic behavior is developed to assess the contact pressures...

... contact problem is obtained. The objective of this paper is to develop an incremental adaptive computational model capable of handling quasistatic viscoelastic frictionless contact problems. The Wiechert model, as an effective model capable of describing both creep and relaxation phenomena, is adopted...

... of the relaxation time parameter. 22 07 2004 26 05 2005 In the present study, surface 1 is assumed to be stationary and surface 2 to be moving with velocity V . In the study of Gecim and Winer ( 8 ), the energy partition ε was obtained from the equivalence of the average contact...