Geometric Nonlinearity Analysis of Composite Laminated Box Beam
In this paper, the differential equations of composite laminated box beams are established based on the principle of minimum potential energy and the variational method. Considering shear lag and shear deformation effects, elastic stiff matrix, geometric nonlinearity stiff matrix and equivalent nodal forces vector of composite laminated box beam element are given. And a finite element program is developed, then a new computing analysis theory for composite laminated box beam is given, both considering shear lag, shear deformation and geometric nonlinearity effects.
Q. Su and Y. P. Wu, "Geometric Nonlinearity Analysis of Composite Laminated Box Beam", Advanced Materials Research, Vols. 168-170, pp. 1999-2002, 2011