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Publications
Li, C.F., Ren, H.L., Zhu, Z.Y. and Guedes Soares, C. (2018), “Numerical investigation on the buckling behaviour of aluminium integrally stiffened panels subjected to uniaxial compressive load”, Thin-Walled Structures, Vol. 127, pp. 221-234
The aim of this study is to analyse the buckling strength of stiffened aluminium panels, built with extruded aluminium profiles in alloy AA6082-T6, by a non-linear finite element method. The MSC.Marc software is used to reproduce the mechanical response of the stiffened panels subjected to axial compression and the fabrication related imperfections, such as initial deformations, material softening in heat-affected zone (HAZ) and residual stresses are simulated. The numerical simulations are compared with the experimental response curves. Then, analyses of sensitivity to geometric parameters, initial imperfections and material properties are carried out. The results show that for the considered panel: 1) The ultimate strength is more sensitive to the cross-section dimensions than the length; 2) The initial deformation has a strong effect not only on the level of ultimate strength but also on the failure mode as well; 3) The HAZ including both the width of HAZ and the yield strength in HAZ has little effect on ultimate strength of the considered aluminium integrally stiffened panels; 4) The residual stresses will improve the ultimate strength for the considered panels.
Keywords: Aluminum alloys, integrally stiffened panel, buckling strength, non-linear finite element analysis, initial imperfections.
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