Flexural–torsional behavior of thin-walled composite beams with closed cross-section

This paper investigates the static and dynamic characteristics of composite thin-walled beams that are constructed from a single-cell box. The structural model considered herein incorporates a number of nonclassical effects, such as material anisotropy, transverse shear, warping inhibition, nonuniform torsional model and rotary inertia. The governing equations were derived using extended Hamiltonʹs principle and solved using extended Galerkinʹs method. The effects of fiber orientation on static deflection and natural frequencies are considered and a number of important conclusions are outlined.