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A simplified prediction method for the local buckling load of cylindrical tubes

  • Kwanghyun Ahn
  • In-Gyu Lim
  • Jonghun YoonEmail author
  • Hoon Huh
Article

Abstract

Local buckling is as important as column buckling, substantially, when a thin-walled tube is applied to a structural part for guaranteeing safety design. This paper newly proposes an analytic model for predicting local buckling since a conventional Plantema equation is not able to predict the local buckling load, accurately, due to perfectly plastic assumption in the tube material. The proposed analytic model adopts a plastic flow of tube material to take into consideration of strain hardening, sequentially, which has been validated with experimental and numerical buckling loads when applying a thin-walled cylindrical tube. Remarkably, it shows good agreement with numerical and experimental buckling load compared with the conventional Plantema equation.

Keywords

Collapse Cylindrical tube Local buckling Plantema equation 

Nomenclature

R

tube radius

D

tube diameter

t

tube thickness

Pcr

critical load for local buckling

σcr

critical stress for local buckling

σy

yield stress

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Copyright information

© Korean Society for Precision Engineering and Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • Kwanghyun Ahn
    • 1
  • In-Gyu Lim
    • 2
  • Jonghun Yoon
    • 3
    Email author
  • Hoon Huh
    • 4
  1. 1.SMART System Design DivisionKorea Atomic Energy Research InstituteDaejeonSouth Korea
  2. 2.Central Research InstituteSamsung Heavy IndustriesGyeonggi-doSouth Korea
  3. 3.Department of Mechanical EngineeringHanyang UniversityGyeonggi-doSouth Korea
  4. 4.Department of Mechanical EngineeringKAISTDaejeonSouth Korea

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