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A comparison is made to the solutions based on discrete plate with simplified support conditions as well as to a recently proposed equation for major-axis bending.
Being obtained from a full-section approach, the equation does not require independent calculations for web and compression flange, which are typical of discrete plate analysis.
The present paper deals with the onset of local buckling of compressively loaded thin-walled beams made of orthotropically laminated composite materials using discrete plate analysis.
The analytical predictions for local buckling of various FRP profiles based on the present discrete plate analysis and considering the elastic restraints of the flange web connections are in excellent agreements with available experimental results and finite element eigenvalue analyses.
The applicability of the explicit solutions of restrained composite plates is illustrated in the discrete plate analysis of two composite structures: short thin-walled composite columns and honeycomb sandwich cores.
The proposed solution for nonlinear static analysis of rotationally-restrained composite plates with imperfection is accurate and effective, as demonstrated by the comparisons with the predictions by the finite element analysis, and combined with the discrete plate analysis technique, it can be potentially applied to post-buckling analysis of FRP structural shapes.
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The two cases of rotationally restrained plates (i.e., the RR and RF plates) are further treated as discrete plates of closed and open sections, and by considering the effect of elastic restraints at the joint connections of flanges and webs, the local buckling of different FRP shapes under uniform axial compression is studied.
Based on this theory as well as methodology of the refined triangular discrete Kirchhoff plate element, a triangular laminated plate element satisfying the requirement of C1 continuity is presented.
Finally, the proposed discrete restrained plate solution is applied to predict the web local buckling of FRP shapes by adopting the proper rotational restraint stiffness.
Based on both the proposed model and the methodology of the discrete Kirchhoff plate bending element, a triangular finite element is also presented.
The exact lattice solution is derived for the discrete microstructured plate model via the resolution of a linear difference boundary value problem.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com