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    Three-Dimensional Finite Strip Analysis of Laminated Stiffened Panels

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    Publication date
    2007
    Author
    Attallah, K.M.Z.
    Ye, J.
    Lam, Dennis
    Keyword
    Three Dimensional Analysis
    Spline Finite Strip
    Laminated Composites
    State Space Approach
    Plate Modelling
    Orthotropic Plates
    Peer-Reviewed
    Yes
    
    Metadata
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    Abstract
    In this paper, a new three-dimensional spline finite strip method (spline FSM) is introduced. This is done by combining the classical spline finite strip method [1] and the state space approach. According to the traditional spline FSM, a laminated plate is divided into strips. Within each strip, the spline FSM calls for the use of simple polynomials and a continuously differentiable spline function, respectively, in the transverse and in-plane directions. In the through-thickness direction, the state space method is used to compute the distribution of displacements and stresses. The combination of the in-plane spline FSM and the out-of-plane state space formulations results in a global state space equation that is solved numerically by the precise time step integration method [2,3]. Apart from obtaining a three-dimensional solution, the new method has a unique feature that the final algebra equation system is independent of the number of material layers of a laminate. The main aim of this work is to establish the new solution procedure and validate the method. To this end, the work reported in the paper focus on laminated plates with arbitrary boundary conditions. Thus, the spline FSM is more flexible than the FSM in imposing boundary conditions. Future development is expected to extend the solution to more practical applications. From the numerical validation included, it can be seen clearly that the newly developed method can provide accurate three dimensional solutions for laminated composites, particularly, with continuous transverse stress distributions across material interfaces. This is normally difficult to obtain if a traditional three dimensional finite element is used, where only continuity of displacements across material boundaries are guaranteed. Apart from the above new feature, the new three-dimensional formulation always ends up with a global matrix whose dimension depends only on the number of strips and knots that a plate has been divided into, and is completely independent of the number of material layers of the plate.
    URI
    http://hdl.handle.net/10454/5566
    Version
    No full-text available in the repository
    Citation
    Attallah, K.M.Z., Ye, J. and Lam, D. (2007). Three-Dimensional Finite Strip Analysis of Laminated Stiffened Panels. In: Proceedings of the 11th International Conference on Civil, Structural and Environmental Engineering and Computing by B.H.V. Topping (Ed.). 11th International Conference on Civil, Structural and Environmental Engineering and Computing 18-21 September, 2007, St Julians, Malta.
    Link to publisher’s version
    http://dx.doi.org/10.4203/ccp.86.125
    Type
    Conference paper
    Collections
    Engineering and Informatics Publications

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