COMPLAS 2023

On the Influence of the Lattice Geometry on the Mechanical Properties of Additively Manufactured Metamaterials

  • Garrido, Conrado (Universidad Politécnica de Madrid)
  • Alabort, Enrique (Alloyed Ltd)
  • Barba, Daniel (Universidad Politécnica de Madrid)

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The advancement of metallic additive manufacturing technologies, such as Laser Powder Bed Fusion, has allowed for the production of intricate geometries with a great potential for material lightweighting. Periodic lattice structures (also included in the family of metamaterials) are commonly employed for this purpose. These structures consist of a variety of elemental struts in variety of geometrical designs and interconnections. However, it is well known that the mechanical properties of additively manufactured parts are dependent on the printing geometry and orientation [1-2] which is relevant for the design stage. In this study, the mechanical properties of 3D printed alloy struts with different diameters and orientations were addressed. Bulk lattice structures were also tested to understand the influence of the different mechanical properties on the overall lattice response with support of material models. The results show the importance of accounting for the particularities of the unit lattice cell geometry when designing a 3D printed metamaterial component.