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A new computerized method using a thin, flexible sensor to measure stress distribution during loading and unloading of gaskets is disclosed. Stress measurement is achieved by a change in the sensor's electrical resistance as a function of load. Each sensor has many electrical pressure responsive contact points that give a map of stress. The unloading of a gasket due to hydrostatic end forces, thermal motions, and external loads can be observed and measured without modifying the flange environment. Use of this new technology permits better and faster gasket and flange design optimization. Monitoring of gasket stress during unit operation is also possible in some cases. The system uses a personal computer operating specially developed graphics software. It provides visual two and three dimensional dynamic stress distribution representations as well as total compressive force, on the sensor, in real time.

Many of the gaskets used in modern performance engines need to incorporate different design configurations than their counterparts which are used to seal similar engines installed in passenger cars. In this paper some of these different configurations are identified.

THERE ARE A VARIETY of combustion seal designs used throughout the world for sealing the combustion gases of internal combustion engines. This paper describes a number of the designs and discusses the sealing theory inherent in them. Static and dynamic physical properties as related to sealing performance are discussed.