As a powerful engineering tool, finite element analysis (FEA) is widely used for the design optimization of elastomeric products. However, its effectiveness is often limited for applications which involve significant frictional effects. This paper uses a systems approach to deal with friction problems. The FEA-predicted normal force is correlated, by a system coefficient of friction, to the frictional force measured through testing for a particular design. This coefficient of friction is then combined with FEA results to predict frictional force for the design modifications. This approach was applied to the design modification of U-Cup spool valve seals. The seals were fine-tuned to give satisfied sealing requirements with controlled frictional drag. The FEA-predicted frictional forces were in good agreements with the testing results.
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