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    Simplified and accurate stiffness of a prismatic anisotropic thin-walled box.

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    TOMEJ-12-1.pdf
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    Authors
    Canale, Giacomo
    Rubino, Felice
    Weaver, Paul M.
    Citarella, Roberto
    Maligno, Angelo
    Affiliation
    Rolls-Royce Plc
    University of Salerno
    University of Bristol
    University of Derby
    Issue Date
    2018-02-14
    
    Metadata
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    Abstract
    Background: Beam models have been proven effective in the preliminary analysis and design of aerospace structures. Accurate cross sectional stiffness constants are however needed, especially when dealing with bending, torsion and bend-twist coupling deformations. Several models have been proposed in the literature, even recently, but a lack of precision may be found when dealing with a high level of anisotropy and different lay-ups. Objective: A simplified analytical model is proposed to evaluate bending and torsional stiffness of a prismatic, anisotropic, thin-walled box. The proposed model is an extension of the model proposed by Lemanski and Weaver for the evaluation of the bend-twist coupling constant. Methods: Bending and torsional stiffness are derived analytically by using physical reasoning and by applying bending and torsional stiffness mathematic definition. Unitary deformations have been applied when evaluation forces and moments arising on the cross section. Results: Good accuracy has been obtained for structures with different geometries and lay-ups. The model has been validated with respect to finite element analysis. Numerical results are commented upon and compared with other models presented in literature. Conclusion: For cross sections with a high level of anisotropy, the accuracy of the proposed formulation is within 2% for bending stiffness and 6% for torsional stiffness. The percentage of error is further reduced for more realistic geometries and lay-ups. The proposed formulation gives accurate results for different dimensions and length rations of horizontal and vertical walls.
    Citation
    Canale, G. et al (2018) 'Simplified and Accurate Stiffness of a Prismatic Anisotropic Thin-Walled Box', The Open Mechanical Engineering Journal, 12 (1):1 .
    Publisher
    Bentham Open
    Journal
    The Open Mechanical Engineering Journal
    URI
    http://hdl.handle.net/10545/622288
    DOI
    10.2174/1874155X01812010001
    Additional Links
    http://benthamopen.com/FULLTEXT/TOMEJ-12-1
    Type
    Article
    Language
    en
    ISSN
    1874155X
    ae974a485f413a2113503eed53cd6c53
    10.2174/1874155X01812010001
    Scopus Count
    Collections
    Institute for Innovation in Sustainable Engineering

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