WARPING SOLUTION FOR SHEAR LAG IN THIN-WALLED ORTHOTROPIC COMPOSITE BEAMS

The authors present a warping solution for prismatic thin-walled orthotropic composite beams. For beam-wall macroelements, the macro approach solution is used to derive the displacements as a sum of polynomial plus Fourier functions. The kinematics of a beam-wall are obtained from a generalized plane stress solution. Constitutive equations that consider slender and stiffened fiber-reinforced plastic sections are proposed. A fast converging, continuous, closed-form solution is obtained for the macroelement. The wall displacement field is assessed in relation to nodal line parameters. Elastic coefficients that account for warping effects are introduced to provide a mechanics interpretation of the formulation. To illustrate the macroelement assembling technique, an explicit warping solution for bending of box beams is presented. The warping solution is correlated with existing analytical solutions. An expression for both effective width and effective longitudinal modulus variation in flanges of box beams is presented. A design equation is proposed that is consistent with current practice.

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  • English

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  • Accession Number: 00723374
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 30 1996 12:00AM