Abstract
The main function of expansion joints used in various industrial fields is to compensate for movements in pipe systems, machines and equipment. The movements to be compensated are relative motions between two parts of a system, caused by temperature differences, misalignment during installation, vibration, etc. There are many types of expansion joints, but bellows type expansion joints are most widely used that can absorb movements in any directions, require no maintenance, and take up less space than others. In this study, in order to determine the optimal dimensions of the bellows for expansion joints, the response surface optimization was performed to minimize the maximum stress and volume. The height of corrugations, the pitch of corrugations, and the thickness of the bellows were selected as design variables for optimization. The stress and volume of the optimization model decreased by 11.6% and 30.1%, respectively, compared to the basic model.
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