An investigation into the compressive properties of stainless steel micro-lattice structures

This article presents a theoretical analysis for predicting the initial stiffness E*, and plastic collapse strength σ* pl of BCC micro-lattice blocks under compressive loading. This theoretical analysis is based on the observed deformation mechanisms, and can, in principle, be developed to predict t...

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Bibliographic Details
Published in:The journal of sandwich structures & materials 2011-05, Vol.13 (3), p.303-329
Main Authors: Ushijima, K., Cantwell, WJ, Mines, RAW, Tsopanos, S., Smith, M.
Format: Article
Language:English
Subjects:
Beams (radiation)
Compressive properties
Compressive strength
Finite element method
Mathematical analysis
Mathematical models
Sandwich structures
Three dimensional
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Summary:This article presents a theoretical analysis for predicting the initial stiffness E*, and plastic collapse strength σ* pl of BCC micro-lattice blocks under compressive loading. This theoretical analysis is based on the observed deformation mechanisms, and can, in principle, be developed to predict the elastic properties of other micro-lattice structures. The analytical solutions are verified by comparing the predictions with FEM data using 1D beam and 3D solid elements and uniaxial compression tests on samples fabricated by selective laser melting. The FEM predictions using the 3D solid elements agree well with the experimental data for a wide range of strut aspect ratios, d/L. In addition, the range of applicability of the analytical model and the FEM predictions using beam elements are clarified.
ISSN:1099-6362
1530-7972
DOI:10.1177/1099636210380997