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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium Structural Metamaterials
Presentation Title High-stiffness Metamaterial Composite Structure with Plate Reinforced Strut-microlattice
Author(s) Manash Jyoti Baishya, Bikram Jyoti Sahariah, Nelson Muthu, Prasenjit Khanikar
On-Site Speaker (Planned) Manash Jyoti Baishya
Abstract Scope A novel metamaterial lattice composite structure inspired by the particle reinforced composite materials was designed by combining the plate and strut microlattice topologies to achieve high stiffness. The previously published literature has shown that the plate-lattice exhibits much higher stiffness than that of the strut-lattice, and the stiffness values of the plate-lattice can even exceed the maximum theoretical stiffness limit, i.e., Hashin-Shtrikman upper bound. However, the plate lattices are difficult to be fabricated using additive manufacturing because of the powder entrapment in the enclosed space of the plate lattice. In this study, high stiffness plate-lattice substructures were added as reinforcements in the matrix of strut-lattice to achieve high stiffness. The quasi-static compression behavior of the metamaterial composite structures was predicted using finite element analysis of the heterogeneous lattice structure and equivalent material obtained through the homogenization technique. The results showed that the metamaterial lattice composite with plate reinforcement exhibited considerable improvement in stiffness and elastic strain energy absorption compared to the parent strut lattice of the same relative density.
Proceedings Inclusion? Planned:
Keywords Additive Manufacturing, Composites, Mechanical Properties


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