Holes' Parameters Analysis of a Perforated Thin-Walled Lipped Beam Buckled Under a Bending Load

D.S Khazaal,I.A Abdulsahib,Hussein M H Al-Khafaji

doi:10.15282/ijame.18.3.2021.07.0684

D.S Khazaal, I.A Abdulsahib + Show 1 more

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https://doi.org/10.15282/ijame.18.3.2021.07.0684

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Abstract

This work studied the effects of holes on the buckling characteristic of an open thin-walled lipped channel beam under a bending load. A nonlinear finite element method was utilised to examine the buckling behaviour of the beam. Experimental works were carried out to verify the finite element simulation. Three factors were chosen to examine their influence on the buckling of the beam. These factors namely, the holes’ shape, perforated ratio (hole length to beam height) and spacing ratio (centre to centre distance between holes to beam height). The finite elements output was analysed by implementing the Taguchi method to distinguish the best group of three parameters collections for optimal strength of buckling. Whereas the analysis of variance technique (ANOVA) method was applied to specify the impact of each parameter on critical buckling load. Outcomes showed that the combination of parameters that gives the best buckling strength is the hole with a hexagonal shape, perforated ratio =1.7 and spacing ratio =1.3, and the holes’ shape is the most effective factor. In addition, the study demonstrated that the hole's shape factor has the greatest influence on the buckling capacity. While the perforated ratio factor is the least influential.

Highlights

Thin-walled open section beams are extremely used in engineering applications because of their favourable strength/weight ratio, simplicity of erection and installation, ease of fabrication, and economic conditions
Four specimens of thin-walled lipped channel beams were tested as cantilever beams under a bending load
The experimental results showed that the buckling strength of the thin-walled beam decreases with the presence of holes on the web when subjected to bending load

Summary

INTRODUCTION

Thin-walled open section beams are extremely used in engineering applications because of their favourable strength/weight ratio, simplicity of erection and installation, ease of fabrication, and economic conditions. Javaroni and Goncalves [3] compared experimental results with the direct strength method to investigate the distortional buckling of lipped beams These beams were exposed to bending loading. They expanded their works to test experimentally and numerically the short and intermediate columns under a compression load [9]. Three-dimensional finite element models were employed for parametric analysis, which was exercised to estimate the ultimate bending load capacity of beams subjected to the local buckling. Numerical and experimental investigations were presented to examine the buckling behaviour of perforated thin-walled lipped channel cantilever beams subjected to bending load, and the material of beams is aluminium alloy 6061-0.

C: Width of the grip section

RESULTS AND DISCUSSION

CONCLUSION