About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
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Symposium
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Additive Manufacturing and Cellular/Lattice Structures: Designs, Realization and Applications
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Presentation Title |
Specific Energy Absorption of 3D Printed Octet-Truss Lattice Structures with Hollow Struts |
Author(s) |
Matthew Bolan, Alexander Bardelcik |
On-Site Speaker (Planned) |
Matthew Bolan |
Abstract Scope |
In this work, we investigate the energy absorption properties of octet-truss lattice structures suitable for custom 3D printed personal protection equipment (PPE) applications. High resolution SLA 3D printing was used to produce 3”x3”x3” octet-truss lattice structures with solid and hollow strut members. An extremely ductile polymer (~180% total elongation) was used for these structures, which resulted in no strut failure up to the onset of densification during compression testing of these structures. The relative density of the structures varied from ~0.05 to ~0.5, which was due to variations in strut length (or unit cell density) and strut radius. Although the compressive energy absorption was excellent for the solid strut structures, the specific energy absorption (SEA) was relatively low when compared to expanded poly styrene (EPS), the standard helmet energy absorbing material. The hollow strut lattice structures showed improved SEA performance and potential for increased adoption within custom PPE. |