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Relationships among the Proportional Law and the Charts used in ASME VIII-1 and EN13445-3 for Design Shells and Tubes Under External Pressure

[+] Author and Article Information
Huan Sheng Lai

School of Chemical Engineering, Fuzhou University, Fuzhou, Fujian 350-116, China
sheng158@hotmail.com

Kang Lin Liu

School of Chemical Engineering, Fuzhou University, Fuzhou, Fujian 350-116, China
weizhoulng@126.com

1Corresponding author.

ASME doi:10.1115/1.4036531 History: Received December 30, 2015; Revised March 16, 2017

Abstract

Shells and tubes are usually failure in the form of buckling under external pressure. Charts are used in the design of shells and tubes in the standards of ASME VIII-1 and EN13445-3, in order to simplify the calculation process, while the Proportional Law is a more effective and simply method when it compares with the charts. In this paper, the relationships among the Proportional Law and the charts used in the standards were researched; finite element method (FEM) was used to compare the accuracy among the Proportional Law and the charts. It was theoretically proved that the Proportional Law and the charts were same in calculating the critical buckling pressure; they were different forms of the dimensionless tension stress-strain curves. The simulation results showed that the Proportional Law had the same accuracy as the charts in calculating the critical buckling pressure. Therefore, the Proportional Law can be a candidate method included in the standards for the design of shells and tubes under external pressure.

Copyright (c) 2017 by ASME
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