Nonlinear bending of spherical safety bursting disks under the liquid pressure and temperature
UDC
539.37EDN
WDKVVHAbstract
Stress strain state of thin spherical segments being under the pressure of the heated or cooled liquid on their concave surfaces has been investigated. The numerical analysis has been done in terms of their use as bursting safety disks. The numerical simulations were carried out depending on the environment temperature level, material characteristics and height of the bursting rod above the unstrained membrane pole; the results of these calculations have been obtained. It has been shown that a segment does not meet the conditions of actuation of the safety disks in the absence of constraints in a pole of the segment. 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 the segment is actuated at a lower pressure with increasing temperature at a constant height of a bursting rod. It is shown that in the calculation of the bursting disks, unlike the reverse buckling disks, pressure can be set without considering the interaction with the working environment. The completeness of account of the temperature dependence of the material properties to the calculation of the stress-strain state of a segment has been analyzed.
Keywords:
safety bursting disks, spherical segment, pressure, temperature, nonlinear bendingReferences
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