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Mechanical Performance Comparison of Sandwich Panels with Graded Lattice and Honeycomb Cores

Georges, Hussam ; García Solera, Diego ; Aguilar Borasteros, Carlos ; Metar, Mohmad ; Song, Gyeongseob ; Mandava, Rahul ; Becker, Wilfried ; Mittelstedt, Christian (2024)
Mechanical Performance Comparison of Sandwich Panels with Graded Lattice and Honeycomb Cores.
In: Biomimetics, 2024, 9 (2)
doi: 10.26083/tuprints-00027163
Article, Secondary publication, Publisher's Version

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Item Type: Article
Type of entry: Secondary publication
Title: Mechanical Performance Comparison of Sandwich Panels with Graded Lattice and Honeycomb Cores
Language: English
Date: 13 May 2024
Place of Publication: Darmstadt
Year of primary publication: 6 February 2024
Place of primary publication: Basel
Publisher: MDPI
Journal or Publication Title: Biomimetics
Volume of the journal: 9
Issue Number: 2
Collation: 18 Seiten
DOI: 10.26083/tuprints-00027163
Corresponding Links:
Origin: Secondary publication DeepGreen

The design of graded and multifunctional lattice cores is driven by the increasing demand for high-performance components in lightweight engineering. This trend benefits from significant achievements in additive manufacturing, where the lattice core and the face sheets are fabricated simultaneously in a single print job. This work systematically compares the mechanical performance of sandwich panels comprising various graded lattice cores subjected to concentrated loads. In addition to graded lattice cores, uniform lattices and conventional honeycomb cores are analyzed. To obtain an optimized graded lattice core, a fully stressed design method is applied. Stresses and displacements are determined using a linear elastic analytical model that allows grading the core properties in a layerwise manner through the core thickness. The analysis indicates the superior performance of graded lattice cores compared to homogeneous lattice cores. However, conventional honeycombs outperform graded lattice cores in terms of load-to-weight ratio and stiffness-to-weight ratio. This study provides valuable insights for the design of lattice core sandwich panels and the advantages of several design approaches.

Uncontrolled Keywords: sandwich panels, 3D lattice core, honeycomb core, fully stressed design, graded core, design for additive manufacturing
Identification Number: Artikel-ID: 96
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-271635
Additional Information:

This article belongs to the Special Issue Bionic Design & Lightweight Engineering

Classification DDC: 500 Science and mathematics > 570 Life sciences, biology
600 Technology, medicine, applied sciences > 620 Engineering and machine engineering
Divisions: 16 Department of Mechanical Engineering > Institut für Leichtbau und Strukturmechanik (LSM)
Date Deposited: 13 May 2024 12:33
Last Modified: 13 May 2024 12:33
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/27163
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