Importance

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Abstract

A lattice structure according to an embodiment of the invention comprises a plurality of struts integrally connected to one another at a plurality of nodes, wherein the plurality of struts are arranged into at least a first region comprising a first repeating strut arrangement, a second region comprising a second repeating strut arrangement, the first repeating strut arrangement being different to the second repeating strut arrangement, and a boundary region disposed between the first region and the second region, the boundary region comprising a plurality of struts configured to connect nodes in the first region to nodes in the second region, a strut arrangement in the boundary region being different to the first and second repeating strut arrangements. The first repeating strut arrangement and/or the second repeating strut arrangement may be configured based on a crystallographic lattice, including but not limited to the Bravais lattices. Such an arrangement of lattices can mimic the polygrain structure in crystals so as to enhance the strength and ductility of the lattice structure, using strengthening mechanisms analogous to those in crystalline alloys. Methods and apparatus for designing a lattice structure are also disclosed.

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First Claim