Design variables are fiber angles in wall laminates.
Dependency between fiber angles in the web and the flanges,
due to the specific manufacturing process, is taken into account.
Geometrical dimensions and number of plies in each wall are
not included in design variables in this phase of the project.
S - symmetric, A - antisymmetric, NS - non-symmetric
symmetric specially orthotropic (00/900 only)
antisymmetric angle ply
||-F1-both flanges NS, beam NS
-F2-one flange S, beam NS
-F3-all walls S (00/900 only)
-F4-flanges NS, beam S or A
|-F5-both flanges NS, beam NS
-F6-one flange S or A, beam NS
-F7-one flange S, one flange A, beam NS
-F8-flanges NS, beam A
-F9-flanges S or A, beam A
Design of I-beams is a global optimization problem.
The following is an illustration of a design space in
Torsional stiffness as a function of fiber orientations
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