Local optimisation of long anisotropic laminated fibre composite panels with T shape stiffeners

J. Enrique Herencia, Paul M. Weaver, Mike I. Friswell

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

A method to locally optimise long anisotropic laminated fibre composite panels with T shape stiffeners is presented. The technique splits the optimisation problem into two levels. At the first level, composite optimisation is performed using mathematical programming (MP), and the skin and stiffeners are modelled using lamination parameters that account for their membrane and flexural anisotropy. Skin and stiffener laminates are assumed to be symmetric, or mid-plane symmetric laminates, with 0, 90, 45, or -45 degree, ply angles. The skin-stiffener configuration is further idealised as a group of flat plate laminates that are rigidly connected. The panel is subjected to a combined case of loading under strength, budding and manufacturing constraints. At the second level, the actual skin and stiffener lay-ups are obtained using a genetic algorithm (GA) and considering the ease of manufacture. This approach offers the advantage of introducing accurate analysis methods such as finite elements at the first level, without significant increases in processing time. Furthermore modelling the laminate anisotropy enables the designer to explore and potentially use elastic tailoring in a beneficial manner.

Original languageEnglish
Title of host publicationCollection of Technical Papers - 47th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
Subtitle of host publication14th AIAA/ASME/AHS Adaptive Structures Conference, 8th AIAA Non-deterministic App
Pages6869-6893
Number of pages25
Publication statusPublished - 2006
Externally publishedYes
Event47th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference - Newport, RI, United States
Duration: 1 May 20064 May 2006

Publication series

NameCollection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
Volume10
ISSN (Print)0273-4508

Conference

Conference47th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
Country/TerritoryUnited States
CityNewport, RI
Period1/05/064/05/06

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