Generation of Shakedown Boundaries of Thin-Walled 90-Deg Scheduled Pipe Bends Determined Via Large and Small Displacement Finite Element Models

Abstract

Abstract The present research investigates the effect of employing large displacement in finite element modeling on the generated shakedown (SD) boundaries of thin-walled 90-deg scheduled pipe bends. A recently developed methodology termed: shakedown limit—plastic work dissipation (SDLimit−PWD) method generates the SD boundaries via employing the large displacement in the finite element (FE) simulations. Additionally, a well-established direct noncyclic technique termed: shakedown direct noncyclic technique (SD_DNT) generates the SD boundaries via employing the small displacement formulation in the FE simulations. Comparing the SD boundaries generated via both methods illustrated a marked increase in the generated SD domains due to employing large displacement.