Optimization of anisotropic composite panels with T-shaped stiffeners including transverse shear effects and our-of-plane loading

JE Herencia, PM Weaver, MI Friswell

Research output: Contribution to journalArticle (Academic Journal)peer-review

19 Citations (Scopus)

Abstract

A two-step method to optimize anisotropic composite panels with T-shaped stiffeners, including a new formulation of the transverse shear properties and an approximation of the ply contiguity (blocking) constraints as functions of the lamination parameters is provided. At the first step, a representative element of the stiffened panel (superstiffener) is optimized using mathematical programming and lamination parameters subjected to combined loading (in-plane and out-of-plane) under strength (laminate or ply failure), buckling and practical design constraints. Ply blocking constraints are imposed at this step to improve convergence towards practical laminates. At the second step, the actual superstiffener’s laminates are obtained by using a genetic algorithm. Results, for the case considered, show that the inclusion of transverse shear effects has an associated 2.5% mass penalty and that neglecting its effects might invoke earlier buckling failure. In addition, the influence of designing for failure strength at laminate or ply level is assessed.
Translated title of the contributionOptimization of anisotropic composite panels with T-shaped stiffeners including transverse shear effects and our-of-plane loading
Original languageEnglish
Pages (from-to)165 - 184
Number of pages20
JournalStructural and Multidisciplinary Optimization
Volume37 (2)
DOIs
Publication statusPublished - 2008

Bibliographical note

Publisher: Springer-Verlag

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