A dataset for the publication: Lightweight hybrid composite sandwich structures with additively manufactured cellular cores

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A dataset for the publication: Lightweight hybrid composite sandwich structures with additively manufactured cellular cores Albert Forés-Garriga, Giovanni Gómez-Gras and Marco A. Pérez* Thin-Walled Structures, 2023 This study focuses on advancing sandwich structures by designing and fabricating complex two- and three-dimensional cellular cores combined with Carbon Fiber Reinforced Polymer (CFRP) skins. Numerical analysis is used to investigate the effect of core design and density on the bending performance. Optimal configurations are identified and experimentally validated. Professional Fused Filament Fabrication (FFF) equipment with a heating chamber is employed for manufacturing the core samples to enhance layer cohesion and material joint stiffness. A high-performance technical polymer with a superior strength-to-weight ratio is employed to maximize structural capabilities. Hybrid sandwich structures with PEI Ultem cellular cores demonstrate stiffness and strength comparable to reference materials, outperforming foam cores while slightly trailing behind Nomex® and aluminum honeycombs. In addition, the results demonstrate more efficient cell morphologies achievable through additive manufacturing technologies, surpassing the hexagonal design. This work provides valuable insights into hybrid composite materials and the potential of additive manufacturing in creating lightweight, high-performance sandwich panels. This dataset contains: - 01 Numerical Approach: - 01 Unit Cell Designs: 3D CAD models developed for creating the unit cell designs in .SLDPRT and .STL file format. - 02 Homogenization RVE: Effective stiffness tensor of the RVE of each cellular design (in Pa units) in .csv file format. - 02 Experimental Tests: - 01 Core Designs: 3D CAD models for manufacturing the samples in .SLDPRT and .STL file format. - 02 Bending Tests Curves: Experimental test data for each sandwich panel in .xls file format.

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