Weight optimal design of lateral wing upper covers made of composite materials

Aeroelastic optimization has become an indispensable component in the evaluation of divergence and flutter characteristics for plated/shell structures. The present paper intends to review the fundamental trends and dominant approaches in the optimal design of engineering constructions. A special attention is focused on the formulation of objective functions/functional and the definition of physical (material) variables, particularly in view of composite materials understood in the broader sense as not only multilayered laminates but also as sandwich structures, nanocomposites, functionally graded materials, and materials with piezoelectric actuators/sensors. Moreover, various original aspects of optimization problems of composite structures are demonstrated, discussed, and reviewed in depth.

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Beetle forewings: Epitome of the optimal design for lightweight composite materials

Carbohydrate Polymers ◽

10.1016/j.carbpol.2012.08.061 ◽

2013 ◽

Vol 91 (2) ◽

pp. 659-665 ◽

Cited By ~ 42

Author(s):

Jinxiang Chen ◽

Gang Wu

Keyword(s):

Composite Materials ◽

Optimal Design

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Optimal design of composite lateral wing upper covers. Part II: Nonlinear buckling analysis

Aerospace Science and Technology ◽

10.1016/j.ast.2016.01.020 ◽

2016 ◽

Vol 51 ◽

pp. 87-95 ◽

Cited By ~ 12

Author(s):

E. Barkanov ◽

E. Eglītis ◽

F. Almeida ◽

M.C. Bowering ◽

G. Watson

Keyword(s):

Optimal Design ◽

Buckling Analysis ◽

Nonlinear Buckling ◽

Lateral Wing ◽

Nonlinear Buckling Analysis

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Sequential laminates in multiple-state optimal design problems

Mathematical Problems in Engineering ◽

10.1155/mpe/2006/68695 ◽

2006 ◽

Vol 2006 ◽

pp. 1-14 ◽

Cited By ~ 6

Author(s):

Nenad Antonic ◽

Marko Vrdoljak

Keyword(s):

Composite Materials ◽

Optimal Design ◽

Optimality Conditions ◽

Matrix Phase ◽

Numerical Treatment ◽

State Equations ◽

Design Problems ◽

Stationary Diffusion ◽

Multiple State ◽

Diffusion Problems

In the study of optimal design related to stationary diffusion problems with multiple-state equations, the description of the setH={(Aa1,...,Aam):A∈K(θ)}for given vectorsa1,...,am∈ℝd(m<d) is crucial.K(θ)denotes all composite materials (in the sense of homogenisation theory) with given local proportionθof the first material. We prove that the boundary ofHis attained by sequential laminates of rank at mostmwith matrix phaseαIand coreβI(α<β). Examples showing that the information on the rank of optimal laminate cannot be improved, as well as the fact that sequential laminates with matrix phaseαIare preferred to those with matrix phaseβI, are presented. This result can significantly reduce the complexity of optimality conditions, with obvious impact on numerical treatment, as demonstrated in a simple numerical example.

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