In order to use the finite elements efficiently in the design of PTFE seals at an early stage a suitable material model is a basic requirement. To the knowledge of the authors such a material model is not yet commercially available.So a typical polytetrafluorethylen (PTFE) compound with glass fiber and other fillers has been investigated. This type of compound is extensively used for main lip rotary shaft seals.Material properties like stress-strain characteristics and relaxation under traction- and compression load were measured at various temperatures and their dependence on time was analyzed.A material model was developed to be implemented into FE-programs.Calculated and measured values of the radial load of shaft seals with varying loading over time were compared and prove the reliability of the proposed material model.
Relaxation of Thermoplastic Rotary Shaft Seals
Sae Technical Papers
International Congress & Exposition ; 1996
1996-02-01
Conference paper
English
Relaxation of thermoplastic rotary shaft seals
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