Bi-modal buckling of optimised truss-lattice shear panels
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A truss-lattice panel is modeled under shear loading, up to and beyond the critical buckling load. Nondimensional 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 optimization of the truss lattice is given, based upon simultaneous in-plane and out-of-plane buckling. The finite element method is applied to examine the buckling performance and postbuckling stability. The postbuckling response of the optimized 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 those of a conventional continuous shear panel, based on the load carried and the buckling capabilities. It is shown that although the continuous shear panel is more efficient for heavy load applications, the truss lattice offers potential weight savings when lighter loads are applied.
|Creators||Williams, P. A., Kim, H. A. and Butler, R.|
|Uncontrolled Keywords||struts, shear deformation, trusses, buckling, structural loads, optimization, structural panels|
|Departments||Faculty of Engineering & Design > Mechanical Engineering|
|Research Centres||Aerospace Engineering Research Centre|
Available Versions of this Item
- Bimodal buckling of optimised truss-lattice shear panels. (deposited 16 Oct 2008 12:38)
- Bi-modal buckling of optimised truss-lattice shear panels. (deposited 23 Jun 2009 10:06)[Currently Displayed]
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