Affiliation(s):
Institute of Process Equipment, Zhejiang University, Hangzhou 310027, China;
moreAffiliation(s): Institute of Process Equipment, Zhejiang University, Hangzhou 310027, China; Engineering Research Center for High Pressure Process Equipment and Safety of Ministry of Education., Hangzhou 310027, China; State Key Laboratory of Fluid Power and Mechatronic Systems, Hangzhou 310027, China;
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Sheng YE, Keming LI, Jinyang ZHENG, San SUN. New formula for predicting plastic buckling pressure of steel torispherical heads under internal pressure[J]. Journal of Zhejiang University Science A,in press.Frontiers of Information Technology & Electronic Engineering,in press.https://doi.org/10.1631/jzus.A2300432
@article{title="New formula for predicting plastic buckling pressure of steel torispherical heads under internal pressure", author="Sheng YE, Keming LI, Jinyang ZHENG, San SUN", journal="Journal of Zhejiang University Science A", year="in press", publisher="Zhejiang University Press & Springer", doi="https://doi.org/10.1631/jzus.A2300432" }
%0 Journal Article %T New formula for predicting plastic buckling pressure of steel torispherical heads under internal pressure %A Sheng YE %A Keming LI %A Jinyang ZHENG %A San SUN %J Journal of Zhejiang University SCIENCE A %P %@ 1673-565X %D in press %I Zhejiang University Press & Springer doi="https://doi.org/10.1631/jzus.A2300432"
TY - JOUR T1 - New formula for predicting plastic buckling pressure of steel torispherical heads under internal pressure A1 - Sheng YE A1 - Keming LI A1 - Jinyang ZHENG A1 - San SUN J0 - Journal of Zhejiang University Science A SP - EP - %@ 1673-565X Y1 - in press PB - Zhejiang University Press & Springer ER - doi="https://doi.org/10.1631/jzus.A2300432"
Abstract: Torispherical heads are commonly used as end closures of pressure vessels. Thin-walled torispherical heads under internal pressure can fail by plastic buckling because of compressive circumferential stresses in the head knuckle. However, existing formulas still have limitations, such as complicated expressions and low accuracy, in determining buckling pressure. In this paper, we propose a new formula for calculating the buckling pressure of torispherical heads based on elastic-plastic analysis and experimental results. First, a finite element method based on the arc-length method to calculate plastic buckling pressure of torispherical heads is established, considering the effects of material strain hardening and geometrical nonlinearity. The buckling pressure results calculated by the finite element method in this paper have good consistency with those of BOSOR5, which is a program for calculating the elastic-plastic bifurcation buckling pressure based on the finite difference energy method. Second, the effects of geometric parameters, material parameters and restraint form of head edge on buckling pressure are investigated. Third, a new formula for calculating plastic buckling pressure is developed by fitting the curve of finite element results and introducing a reduction factor determined from experimental data. Finally, based on the experimental results, we compare the predictions of the new formula with existing formulas. It is shown that the new formula has a higher accuracy than existing ones.
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