Abstract
Two statements are given for the problem of optimum design of cylindrical pressure vessels taking account of autofretting. The first statement assumes successive solution of two optimization problems. First the optimum residual stress distribution is determined with which strength restrictions are fulfilled for a cylinder of minimum thickness. Then the optimum autofretting pressure is found with which residual stress curves are close to the optimum according to a certain standard. The second statement does not require an iteration procedure and its makes it possible immediately to determine the optimum autofretting pressure corresponding to the minimum permissible cylinder thickness. The results obtained are compared. Possibilities are demonstrated for strengthening cylindrical pressure vessels by means of the autofretting process.
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