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Bimodal buckling of optimised truss-lattice shear panels


Reference:

Williams, P. A., Kim, H. A. and Butler, R., 2007. Bimodal buckling of optimised truss-lattice shear panels. In: AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference, 2008-01-01, Waikiki, HI.

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Abstract

A truss-lattice panel model is formulated under shear loading, up to and beyond the critical buckling load. Non-dimensional buckling loads and corresponding buckling mode shapes are obtained for such panels with increasing numbers of diagonally-placed internal struts. A method for minimum-mass optimisation of the truss-lattice is given, subject to a bimodal buckling criterion. The finite element method is applied to examine the buckling performance and post-buckling stability. The post-buckling response of the optimised truss-lattice is shown to be stable in all cases. The advantages of using the truss-lattice structure are demonstrated by comparing the volume requirements with that of a conventional continuous shear panel, based on the load carried and the buckling capabilities. It is shown that whilst the continuous shear panel is more efficient for heavy load applications, the trusslattice offers potential weight savings when lighter loads are applied.

Details

Item Type Conference or Workshop Items (Paper)
CreatorsWilliams, P. A., Kim, H. A. and Butler, R.
Uncontrolled Keywordsstruts, shear deformation, trusses, buckling, structural loads, optimization, structural panels
DepartmentsFaculty of Engineering & Design > Mechanical Engineering
Research CentresAerospace Engineering Research Centre
RefereedNo
StatusPublished
ID Code1475

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