Non-linear pre-buckling behavior of shear deformable thin-walled composite beams with open cross-section

作者：Mancusi Geminiano^*; Feo Luciano

来源：Composites Part B: Engineering , 2013, 47: 379-390.

DOI：10.1016/j.compositesb.2012.11.003

• Polymer-matrix composites (PMCs)
• Buckling
• Finite element analysis (FEA)
• Pultrusion

A kinematic model is presented for thin-walled composite beams able to account for axial force, bending, torsion and warping. Shear deformations on the mid-surface are considered and modeled by means of a polynomial approximation. For this scope appropriate shape functions on the curvilinear abscissa along the cross-section mid-line are introduced. %26lt;br%26gt;Small strains and moderate rotations are considered over the pre-buckling range. %26lt;br%26gt;The model allows to predict the static non-linear behavior and the critical loads of composite pultruded beams. %26lt;br%26gt;A finite element approximation is derived from a variational approach. Some numerical results are also presented revealing the importance of the shear terms on the mechanical response and their effect on the stability of pultruded composite members.

• 出版日期2013-4