110785 20230519145514.0 doi 10.1080/15376494.2021.1919803 sideral 125084 ART-2021-125084 eng Higuera, S. Mechanical properties and energy–absorption capabilities of thermoplastic sheet gyroid structures 2021 Access copy available to the general public Unrestricted The development of additive manufacturing and lattice structures has created opportunities for the development of lightweight impact–absorption structures that can overcome most constraints of previously used materials such as expanded polystyrene foams. However, for the successful application of such structures, the effects of their variables in their mechanical performance must be established. In this study, the mechanical properties and energy absorption of thermoplastic sheet gyroid structures were investigated and compared with the performance of current materials. Consequently, the specimens were tested after changing the main variables, i.e., cell size and volume fraction, of various thermoplastic materials such as acrylonitrile butadiene styrene, polylactic acid, thermoplastic polyurethane, and polyamide 12. Finally, they were tested in a quasi-static compression test and their deformation stages were photographed. The stress–strain curves of all materials changed after adopting the sheet gyroid structure, exhibiting three distinct regions: linear elastic, long collapse plateau, and densification that made them particularly applicable for energy absorption. Volume fraction affected the layer collapse. The elastic geometrical stiffness increased for higher volume fractions and smaller cells. In addition, the peak and plateau stresses increased at higher volume fractions, and while smaller cells were not directly affected. Additionally, the area under the curves increase with the volume fraction; hence, for most materials, specific energy absorption was larger for higher volume fractions. The constituent material properties contributed significantly to the structural behavior, exhibiting three primary deformation mechanisms, i.e., elastomeric, elastic–plastic, and elastic–brittle, resulting in a wide spectrum of properties for each application requirement. The comparison of the optimal properties with the expanded polystyrene demonstrated the ability of sheet gyroid structures to overcome most of its challenges, exhibiting a superior specific energy absorption, ability to withstand various impacts, letting air flow in its all axes, and being recyclable. Thus, sheet gyroid structures can be considered promising alternatives. info:eu-repo/grantAgreement/ES/UZ/UZCUD2019-TEC-04 info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 3.338 2021 MATERIALS SCIENCE, CHARACTERIZATION & TESTING 10 / 32 = 0.312 2021 Q2 T1 MECHANICS 46 / 138 = 0.333 2021 Q2 T2 MATERIALS SCIENCE, COMPOSITES 14 / 29 = 0.483 2021 Q2 T2 MATERIALS SCIENCE, MULTIDISCIPLINARY 194 / 345 = 0.562 2021 Q3 T2 0.662 2021 Civil and Structural Engineering 2021 Q2 Mechanics of Materials 2021 Q2 Mechanical Engineering 2021 Q2 Materials Science (miscellaneous) 2021 Q2 5.5 2021 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Miralbes, R. Universidad de Zaragoza (orcid)0000-0002-9702-9314 Ranz, D. Universidad de Zaragoza (orcid)0000-0001-8451-660X 5002 305 Universidad de Zaragoza Dpto. Ingeniería Diseño Fabri. Área Expresión Gráfica en Ing. (2021), 1-15 Mech. adv. mat. struct. MECHANICS OF ADVANCED MATERIALS AND STRUCTURES 1537-6494 5953437 http://zaguan.unizar.es/record/110785/files/texto_completo.pdf Postprint 465918 http://zaguan.unizar.es/record/110785/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:110785 articulos driver 2023-05-18-15:14:27 ARTICLE