Effects of buckling initiators on mechanical behavior of thin-walled square tubes subjected to oblique loading

A. Alavi Nia, Kh. Fallahnezhad, H. Badnava, H. R. Farhoudi

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

Thin-walled structures usually collapse in Eulerian buckling mode under oblique loads. Energy absorption capacity and crush force efficiency of the structure in this type of collapse are low. Collapse initiators are used to improve these properties. In this research, effect of collapse initiators on energy absorption characteristics of square tubes under oblique quasi-static loads is investigated both experimentally and numerically. Initiators are in the form of cuttings on the tube corners. Results show that collapse initiators in most of the specimens change deformation mode from general buckling to progressive buckling and decrease considerably the peak load; therefore increase crush force efficiency. Furthermore, effect of location and number of initiators is studied. There is good agreement between the numerical results and data from experiments.

Original languageEnglish
Pages (from-to)87-96
Number of pages10
JournalThin-Walled Structures
Volume59
DOIs
Publication statusPublished - Oct 2012
Externally publishedYes

Keywords

  • Collapse initiator
  • Energy absorption
  • Oblique loading
  • Thin-walled tube

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