Numerical analysis of nonlinear bending of the safety bursting disks subjected to the pressure and temperature of the operating medium

Nonlinear straining of thin ellipsoidal segments being under the pressure of the heated or cooled operating medium on their concave surfaces has been numerically studied. The analysis of the segments stress-strain state has been performed in terms of their use as bursting safety disks. Deformation of the disks has been studied in a wide temperature range for different constructive options, such as the absence of limited displacement in a segment pole and the presence of bursting rod above the pole of unstrained dome. It has been shown that the ellipsoidal segment fails to meet the conditions of actuation of the safety disks in the absence of a bursting rod. A segment can be used as a safety bursting disk of the dangerously explosive apparatuses if there is a limited displacement in the segment pole. It has been found that the segment is actuated at a lower pressure with increasing temperature at a constant position of a bursting rod. The results obtained for ellipsoidal and spherical segments having the same bases and the height of the pole above the base have been compared. It has been revealed that the bursting pressure of the ellipsoidal segment is significantly lower than the bursting pressure of a spherical segment of similar geometry at the same process medium temperature and rod location.