Modeling and Simulation of Wear in PTFE Lip Seals

Jian Wei Sun; Li Qin Wang; Le Gu

doi:10.4028/www.scientific.net/AMM.260-261.196

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 260-261Modeling and Simulation of Wear in PTFE Lip Seals

Modeling and Simulation of Wear in PTFE Lip Seals

Abstract:

Radial lip seals made from PTFE composites are used more frequently for sealing of crank shafts in automotive and aerospace industries. Due to the seal loses materials and finally fails. Through experiment on a test rig, the tribology performance of seal can be predicted. Because of the non-linear elasto-viscoplastc material properties of PTFE composites, the finite element analysis (FEA) is adopted. A modified iterative remeshing method is adopted in wear process. The lip wears out according to the contact pressure of the node on the contact surface. Comparisons between numerical simulation and short-term service are made. The results show that the maximum of contact pressure decreased and width increased with wear time added, and the maximum of contact pressure moves toward the lip tip. Finally, it reaches lip tip, the phenomenon of uneven contact pressure was disappeared.