Theoretical and experimental studies of the stress-strain state of expansion bellows as elastic shells.
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Theoretical and experimental studies of the stress-strain state of expansion bellows as elastic shells.

Category «Simulation of physical processes»

Abstract

This paper studies a stress-strain state of the U-shaped expansion bellows under an internal-pressure induced load. The bellows is considered as a corrugated shell of revolution under axisymmetric load. The governing equations have been derived and the numerical calculations of the stress-strain state were carried out. A variant of the classical shell theory based upon Lagrangian mechanics was used. The finite-difference method was applied to solve the obtained system of ordinary differential equations. The ultimate internal pressure resulting in plastic deformations was determined. A simulation of the loss of equilibrium stability of the expansion bellows was performed. The ANSYS code was used for Finite-Element Method (FEM) in order to calculate the stress-strain state in the bellows.

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