APROXIMATIVE METHOD TO CALCULATE STRESS CONCENTRATIONS DUE TO LOCAL FORM DEFLECTION OF LARGE VESSELS

Abstract

In the recent ten-year period, the rapid development of chemical industry has resulted in increasing use of large cylindric or spharical pressure vessels. The geometry of the finished vessels is in most cases other than ideal. In this paper, an approximate method of suitable accuracy for practical use, describing the stress-strain conditions of the deflected shell section in a local co-ordinate system fixed on the central surface of the ideal shell is presented. The results of investigations in the environment of a local indentation of a cylindric vessel are given to illustrate the applicability of the method.