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The gasket cross section plays an important role in the resultant total load, contact stress, and stiffness of a gasket constructed from elastomeric materials. One standard approach to design is based on using a shape factor in conjunction with a simple stiffness calculation. This approach can produce reasonable results for simple cross-sections under small deformation. In many situations, the complexity of the shape and relatively large deformation prevents this approach from predicting the behavior of the gasket with acceptable accuracy. Experimental approaches and finite element methods are effective at characterizing the stiffness under these conditions. In this paper, a parameter study of the results of a sequence of finite element analyses were used to construct a model of standard gasket cross sections, specifically a triangular beaded cross section. The resulting formula can be used to quickly determine the gasket load-deflection with good accuracy.

In an integrated noise isolation system, both gasket and bolt isolators play an important role in the resultant total load, contact stress, and system static and dynamic stiffness. One standard approach to design is based on using a shape factor in conjunction with a simple stress-strain relation. This approach can produce reasonable results under small deformation. But the deviation is so large that it is not appropriate to use it for reliable designs under large deformation. Experimental approaches and finite element methods are effective at characterizing the load-deflection relationship of bolt isolators under large compressive deformation. In this paper, a parameter study of a sequence of finite element analyses will be presented and a parametric model will be determined based on the FEA results to best represent the isolator load-deflection behavior under large compression.