Optimization strategy for minimizing damage in postbuckling stiffened panels

Andrea Faggiani, Brian. G. Falzon

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)

Abstract

Composite materials are finding increasing use on primary aerostructures to meet demanding performance targets while reducing environmental impact. This paper presents a finite-element-based preliminary optimization methodology for postbuckling stiffened panels, which takes into account damage mechanisms that lead to delamination and subsequent failure by stiffener debonding. A global-local modeling approach is adopted in which the boundary conditions on the local model are extracted directly from the global model. The optimization procedure is based on a genetic algorithm that maximizes damage resistance within the postbuckling regime. This routine is linked to a finite element package and the iterative procedure automated. For a given loading condition, the procedure optimized the stacking sequence of several areas of the panel, leading to an evolved panel that displayed superior damage resistance in comparison with nonoptimized designs.

Original languageEnglish
Pages (from-to)2520-2528
Number of pages9
JournalAIAA Journal
Volume45
Issue number10
DOIs
Publication statusPublished - Oct 2007

ASJC Scopus subject areas

  • Aerospace Engineering

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