Abstract
The seals/gaskets are intended to maintain leak-tightness between the two connecting parts instead of welding or soldering. It is advantageous for a repair or maintenance of a system or equipment. However, there is a risk of losing the sealing effect due to stress relaxation or other unexpected events, especially during long-term operations. This study aims to find a configuration of metal C-rings that maximize elastic energy that affects sealing performance through a shape optimization technique. In addition, contact stress was observed, which is also important for the sealing performance. Unlike O-ring seals, the contact point of the metal C-ring seal varies depending on the compression depth. Thus, the size and position of the contact stress were measured in the various compression depths. Besides, the metal C-ring seals are used in a vacuum as well as in pressure environments. Thus, contact stress was evaluated in such environments. For the optimization study, the genetic algorithm (GA) and B-spline were employed, and the outer boundary of the cross-section of the C-ring was determined to be compatible with the existing standards so that it could replace the typical types.
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