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Journal of Failure Analysis and Prevention

, Volume 17, Issue 3, pp 554–562 | Cite as

Comparative Study of Elastic Buckling of Plates Stiffened with Angle Bar Stiffeners

  • Ahmad Rahbar Ranji
Technical Article---Peer-Reviewed
  • 104 Downloads

Abstract

Interactions of different buckling modes in stiffened plates reduce Euler stress. In lieu of detailed analysis, in classification societies rule and in the literature, each buckling mode is treated independently and restraining effect of the adjacent elements is considered as rotational spring. It is the main aim of the present work to compare different rule-based and literature-based expressions proposed for the stiffness of these rotational springs and to determine the accuracy and applicability of them using energy method. Different buckling modes including, plate, torsional, and web buckling and interaction of them are investigated. Upon comparison with given expressions and finite element method, it is found that some of the proposed expressions for stiffness of rotational spring are not applicable in certain conditions.

Keywords

Plate buckling Stiffened panel Torsional buckling Web buckling Plate torsional rigidity 

List of symbols

a

Length attached plate panel

b

Width of attached plate panel

bf

Breadth of the upper flange

DP

Flexural rigidity of attached plate

Dw

Flexural rigidity of web

E

Young’s modulus

G

Shear modulus

hw

Web height of T-bar stiffener

I0

Polar moment of inertia about center of torsion

IW

Sectorial moment of inertia about center of torsion

J

St. Venant’s moment about center of torsion

Jx

St. Venant’s torsional constant of stiffener

kϕ

Spring stiffness of attached plate

m

Half wave numbers in the longitudinal direction

tf

Thickness of the upper flange

tp

Thickness of attached plate

tw

Thickness of the web

α

Plate aspect ratio

ν

Poisson’s ratio

σa

Applied compressive stress

σPE

Plate Euler stress

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Copyright information

© ASM International 2017

Authors and Affiliations

  1. 1.Department of Ocean EngineeringAmirKabir University of TechnologyTehranIran

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