Abstract
Metamaterials with unique energy absorption properties are fabricated by additive manufacturing. Manufacturing limitations, imposed by Laser Powder Bed Fusion (LPBF), hamper the production of in particular 3D metamaterial structures, due to unsupported overhanging struts that are part of the unit cell design. This study analyses two types of 3D metamaterials, the auxetic re-entrant and octet truss. Optimal process parameters are determined experimentally for stainless steel 316L and unit cell design parameters are related to the overall performance of the metamaterial lattices. Drop-weight impact testing experiments are conducted on LPBF-fabricated metamaterial samples. Unique properties for energy absorption, directly related to the metamaterial’s unit cell design, are demonstrated.
| Original language | English |
|---|---|
| Pages (from-to) | 374-379 |
| Number of pages | 6 |
| Journal | Procedia CIRP |
| Volume | 137 |
| DOIs | |
| Publication status | Published - 28 Aug 2025 |
UN SDGs
This output contributes to the following UN Sustainable Development Goals (SDGs)
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SDG 9 Industry, Innovation, and Infrastructure
Keywords
- Metamaterials
- Additive manufacturing
- Laser powder bed fusion
- Auxetic re-entrant lattice
- Octet truss lattice
- Impact testing
- Energy absorption
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