Open Access

ARTICLE

Fabrication and Statics Performance of Pyramidal Lattice Stitched Foam Sandwich Composites

Yun Zhao, Shi Yan^*, Jiale Jia

Department of Engineering Mechanics, Harbin University of Science and Technology, Harbin, China

* Corresponding Author: Shi Yan. Email:

(This article belongs to this Special Issue: Mechanics of Composite Materials and Structures)

Computer Modeling in Engineering & Sciences 2021, 126(3), 1251-1274. https://doi.org/10.32604/cmes.2021.013478

Received 07 August 2020; Accepted 29 October 2020; Issue published 19 February 2021

Abstract

In this study, the pyramidal lattice stitched foam sandwich composite materials were manufactured by integrating top and bottom panels with pyramidal lattice core to overcome the weak interface between the core and the skins of the sandwich structure. The influence of the reinforcing core rods on the mechanical properties including compressive, shear, and three-point bending performances of the foam sandwich composite materials were revealed through theoretical analysis and comparative experiments. The theoretical predictions were consistent with the experimental results. Compressive test, shear test and three-point bending test were performed. The experimental results show that the core rods can significantly improve the compressive performance and energy absorption efficiency of the pyramidal lattice stitched foam sandwich structure. The effect is related to the diameter of the core rod. The core rod with large diameter has better effect. Compared with the foam sandwich structure, the pyramidal lattice reinforcing foam composites have stronger shear and bending resistance. The failure modes and failure mechanisms of the pyramidal lattice stitched foam sandwich structure under the shear load are given. The failure modes and failure mechanisms of the pyramidal lattice stitched foam sandwich structure under the three-point bending load are also given. The study concludes that compared with the foam sandwich structure, the overall mechanical properties of the lattice stitched foam sandwich structure composites are significantly improved.

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Citations