
Shear lag effect on the buckling behaviour of laminated composite box beams is investigated. The investigation involved modelling the box beams for buckling load factor and a method for analyzing the shear lag effects on symmetrically laminated thin walled composite box beams. Studies were done on various parameters affecting both shear lag and buckling as the strength is affected by these conditions. The orthotropic nature of laminated composite box beams has to be taken into consideration in all these analyses. The modelling has been analyzed by ANSYS15.