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A combined analytical and experimental study for flexural-torsional buckling of pultruded fiber-reinforced plastic (FRP) composite open channel beams is presented. Based on the second variational principle and nonlinear plate theory, the total potential energy of the channel beam including shear effect and beam bending-twisting coupling is derived. The stress resultants and displacement fields for...
A combined analytical and experimental study of flexural-torsional buckling of pultruded fiber-reinforced plastic (FRP) composite cantilever I-beams is presented. An energy method based on nonlinear plate theory is developed for instability of FRP I-beam, and the formulation includes shear effect and bending-twisting coupling. Three different types of buckling mode shape functions of transcendental...
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