Buckling of aluminium plates

摘要

Numerical simulations were carried out to study the behaviour of simply supported internal plate aluminium elements in alloy AA6082 tempers T4 and T6 that were subjected to a combination of axial compression and bending. In the analyses, geometrical imperfections, residual stresses and heat-affected zones due to welding were modelled. It was found that the main effect of welding for temper T6 was related to the softening of the material properties in the heat-affected zone and not the residual stresses set up as a result of welding. Furthermore, the ultimate strength of the plates subjected to combined in-plan loading can be conservatively calculated using linear interaction. A comparison was also made between non-welded plates in tempers T4 and T6 as well as between the present numerical analyses for temper T6 plates, EC9 and BS8118.