Mathematical Model Development on the Deformation Behaviour of Symmetric Hexagonal of Various Angles and Square Tubes under Lateral Loading

• Published in: Modern applied science Vol. 8; no. 1; p. 1
• Main Authors: Kamardan, M. Ghazali, Zaidi, A. M. Ahmad, Othman, Mohd Zaid, Dalimin, M. Noh, Thanakodi, Suresh, Mahamad, AK
• Format: Journal Article
• Language: English
• Published: 01.02.2014
• Subjects: Behavior; Collapse; Computer simulation; Deformation; Finite element method; Mathematical models; Symmetry; Tubes
• ISSN: 1913-1844; 1913-1852
• DOI: 10.5539/mas.v8n1p1

The purpose of this research is to develop a mathematical model of the collapse behaviour of symmetric hexagonal tubes. For that, a finite element analysis procedure was conducted using ABAQUS software to determine the lateral collapse behaviour of symmetric hexagonal of angles, [thetas] = 30 degree , 45 degree and 60 degree and square tubes to compare the results with the cylindrical tube. Then, a new predictive mathematical model of the lateral collapse behaviour for the generalized symmetrical geometric tubes is developed based on rigid, perfectly plastic model and the energy balance method. The newly mathematical model was validated with the simulation method results. It was discovered that symmetric hexagonal and square tubes performed different deformation behaviour than the cylindrical tube. Square and symmetric hexagonal with [thetas] = 15 degree tubes performed Type II deformation behaviour. Symmetric hexagonal tubes with [thetas] = 30 degree , 45 degree and 60 degree performed Type I with the perfectly plastic collapse behaviour whereas cylindrical tube performed Type I with strain hardening deformation behaviour. The mathematical prediction model had managed to model the deformation behaviour of symmetric hexagonal tubes with [thetas] = 30 degree , 45 degree and 60 degree but failed to model the square and symmetric hexagonal with [thetas] = 15 degree tubes because it was the perfectly plastic model which suitable for Type I with perfectly plastic deformation behaviour.