Maximum stiffness and minimum weight optimization of laminated composite beams using continuous fiber angles |
| |
Authors: | José Pedro Blasques Mathias Stolpe |
| |
Affiliation: | 1.Department of Mechanical Engineering,Technical University of Denmark,2800 Kgs. Lyngby,Denmark;2.Department of Mathematics,Technical University of Denmark,2800 Kgs. Lyngby,Denmark |
| |
Abstract: | This paper deals with identification of optimal fiber orientations and laminate thicknesses in maximum stiffness and minimum
weight design of laminated composite beams. The structural response is evaluated using beam finite elements which correctly
account for the influence of the fiber orientation and cross section geometry. The resulting finite element matrices are significantly
smaller than those obtained using equivalent finite element models. This modeling approach is therefore an attractive alternative
in computationally intensive applications at the conceptual design stage where the focus is on the global structural response.
An optimization strategy is presented which aims at enabling the use of fiber angles as continuous design variables albeit
the problems may have many local minima. A sequence of closely related problems with an increasing number of design variables
is treated. The design found for a problem in the sequence is projected to generate the starting point for the next problem
in the sequence. Numerical results are presented for cantilever beams with different geometries and load cases. The results
indicate that the devised strategy is well suited for finding optimal fiber orientations and laminate thicknesses in the design
of slender laminated composite structures. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |