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. 2024 Sep 30;17(19):4844.
doi: 10.3390/ma17194844.

Crashworthiness Investigations for 3D-Printed Multi-Layer Multi-Topology Engineering Resin Lattice Materials

Autumn R Bernard  1 , Muhammet Muaz Yalçın  2 , Mostafa S A ElSayed  1
Affiliations

Crashworthiness Investigations for 3D-Printed Multi-Layer Multi-Topology Engineering Resin Lattice Materials

Autumn R Bernard et al. Materials (Basel). .

Abstract

In comparison to monolithic materials, cellular solids have superior energy absorption capabilities. Of particular interest within this category are the periodic lattice materials, which offer repeatable and highly customizable behavior, particularly in combination with advances in additive manufacturing technologies. In this paper, the crashworthiness of engineering multi-layer, multi-topology (MLMT) resin lattices is experimentally examined. First, the response of a single- and three-layer single topology cubic and octet lattices, at a relative density of 30%, is investigated. Then, the response of MLMT lattices is characterized and compared to those single-topology lattices. Crashworthiness data were collected for all topology arrangements, finding that while the three-layer cubic and octet lattices were capable of absorbing 9.8 J and 7.8 J, respectively, up to their respective densification points, the unique MLMT lattices were capable of absorbing more: 19.0 J (octet-cube-octet) and 22.4 J (cube-octet-cube). These values are between 94% and 187% greater than the single-topology clusters of the same mass.

Keywords: cellular materials; cubic lattice topology; energy absorption performance; experimental techniques; octet lattice topology; stereolithography.

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Conflict of interest statement

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

Figures

Figure 1
Figure 1
The 3 × 3 single-layer lattice samples printed with Tough 1500 resin: (a) octet and (b) cubic.
Figure 2
Figure 2
The 3 × 3 × 3 multi-layer lattice samples printed with Tough 1500 resin: (a) octet and (b) cubic.
Figure 3
Figure 3
Schematic view of single- (3 × 3 × 1) and three-layer (3 × 3 × 3) lattice clusters with dimensions.
Figure 4
Figure 4
MTS machine for lattice testing.
Figure 5
Figure 5
The 3 × 3 × 3 MLMT lattice samples printed with Tough 1500 resin: (a) octet-cube-octet and (b) cube-octet-cube.
Figure 6
Figure 6
Stress vs. strain and efficiency vs. strain curves for experiments of (a) cubic and (b) octet lattice printed with Tough 1500 resin. See Figure 7 for photos relating to letter labels.
Figure 7
Figure 7
Progressive compression of experimental sample and numerical model of single-layer cube lattice printed with Tough 1500 resin.
Figure 8
Figure 8
Stress vs. strain and efficiency vs. strain curves for experiments of (a) cubic and (b) octet multi-layer lattices printed with Tough 1500 resin. See Figure 8 for photos relating to letter labels.
Figure 9
Figure 9
Progressive compression of the multi-layer cube lattice sample printed with Tough 1500 resin.
Figure 10
Figure 10
Stress vs. strain and efficiency vs. strain curves for experiments of MLMT lattices: (a) octet-cube-octet and (b) cube-octet-cube printed with Tough 1500 resin. Refer to Figure 10 for photos relating to letter labels.
Figure 11
Figure 11
Progressive compression of the sample of MLMT lattices printed with Tough 1500 resin: (a) octet-cube-octet and (b) cube-octet-cube.
See this image and copyright information in PMC

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