Abstract
A turbofan engine is installed in the aircraft through a lip seal at engine intake. The purpose of the lip seal is to prevent air from leaking into the engine bay. The seal is designed to withstand the aerodynamic pressure and temperature loads due to the ramification of air inside the intake duct. Silicone rubber is a suitable material to fabricate lip seal due to its applicability over a wide range of temperature as compared to other rubbers. In the present study, silicone rubber specimen is subjected to uniaxial compression test as per ASTM D395-03 on Universal Testing Machine(UTM). A stress-strain curve and normal reaction force are obtained. Subsequently, a CAD model of the test specimen is prepared and used to carry out finite element analysis using the experimentally obtained stress-strain curve. The normal reaction force obtained from analysis using various hyperelastic models are compared with the experimental data. Comparison of analytical results with experimental data shows Arruda-Boyce model captures the nonlinear behavior of silicone rubber with acceptable accuracy.
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