Perforation resistance and crushing toughness of hybrid minimal surface-based lattice cores
2025 (English)In: Next Materials, E-ISSN 2949-8228, Vol. 8, article id 100776Article in journal (Refereed) Published
Abstract [en]
The bending-dominated honeycomb-like cores are known for their weak out-of-plane strength and high directional dependency. This paper proposes a new strategy for controlling anisotropy in triply periodic minimal surface-based lattices (e.g., Schwartz Primitive, Pp) to enhance control of the deformation behavior of cores in sandwich panels subjected to impact and crushing loads. It considered creating a hierarchy in the topology of the P lattice through a multi-stage variation in the periodicity along the tested direction to have Php-latticed core. Furthermore, the relative density of the Php-latticed core was graded in a bi-linear manner with minimum relative density at the center, which yields Phpg lattice, to control the collapse behavior of the topology (honeycomb-like Pp i.e., Pc) at the center of the hybrid lattice. Additionally, this study designed a new type of minimal surface-based lattice (Pmp) from an implicit synthesis of Pp and Pc topologies. From the elasto-plastic-damage simulations, the Phpg-latticed core resisted perforation, while the Pmp-latticed core showed significantly improved toughness to the crushing load at quasi-static conditions compared to the other designs. The findings provide valuable insights into controlling the deformation of the core of sandwich panels subjected to impact and crushing loads.
Place, publisher, year, edition, pages
Elsevier BV , 2025. Vol. 8, article id 100776
Keywords [en]
Crushing, Impact loading, Functional gradation, Perforation resistance, Triply periodic minimal surface
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-364460DOI: 10.1016/j.nxmate.2025.100776ISI: 001512558000004Scopus ID: 2-s2.0-105007019110OAI: oai:DiVA.org:kth-364460DiVA, id: diva2:1968276
Note
QC 20250617
2025-06-122025-06-122026-04-20Bibliographically approved