Analysis of shear lag and shear deformation effects in laminated composite box beams under bending loads

摘要

A method for analyzing the shear lag and shear deformation effects on symmetrically laminated thin-walled composite box beams under bending load is presented. The method is based on the theory of composite laminated plates and is deduced by mans of the principle of minimum potential energy, which makes the procedure simple and practical. The formulas given by this method not only satisfy the equilibrium conditions on the cross-section of the thin-walled composite box beams but can be simplified to the known formulas of thin-walled box beams with isotropic materials as well.