Better sealing through FEA: Combining test data with-finite-element methods lets engineers accurately predict seal performance and life.

Trelleborg Sealing Solutions Americas has developed and validated finite element analysis (FEA) methods for comparing common sealing polymers. Samples were tested for compression creep and relaxation and FEA of the materials using test data was performed. The button was tested under compressive load of 450 N held constant for about 15 hour to determine stress-strain data and creep-strain data. Relaxation tests, ring creep tests, and ring relaxation tests were also performed using FEA. It was observed that FEA can help engineers understand creep and stress relaxation, with their respective effects. When extrusion set, cold flow stress relaxation, or aging is concerned FEA can also predict seal behavior. This lets engineers make better material choices, lower costs, predict seal failure more accurately, and reduce safety factors. Ultimately, the result is better-designed products that give outstanding field performance.