Compressive performance and energy absorption of additively manufactured metallic hybrid lattice structures

Xiao, Lixin; Xu, Xiayu; Feng, Genzhu; Li, Shi; Song, Weidong; Jiang, Zhaoxiu

doi:10.1016/j.ijmecsci.2022.107093

Cited by 101 publications

(18 citation statements)

References 57 publications

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“…ε den denotes the densification strain, that is, integral termination point, ,, and ρ c denotes the density of the lattices. As shown in Figure g, comparing across the literature, ,− BMMMs show superior performance with a much higher SEA metric. All specimens possess high SEA over 32 kJ/kg, and the highest SEA is up to about 40 kJ/kg which is notably far above those of these mainstream metal microlattices and the corresponding general trend.…”

Section: Resultsmentioning

confidence: 68%

New Class of Multifunctional Bioinspired Microlattice with Excellent Sound Absorption, Damage Tolerance, and High Specific Strength

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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Although mutually independent, simultaneous sound absorption and superior mechanical properties are often sought after in a material. One main challenge in achieving such a material will be on how to design it. Herein, we propose a bamboo-inspired design strategy to overcome the aforementioned challenges. Building on top of the basic octet-truss design, we introduce a hollow-tube architecture to achieve lightweight property and mechanical robustness and a septum-chamber architecture to introduce acoustic resonant cells. The concept is experimentally verified through samples fabricated using selective laser melting with the Inconel 718 alloy. High sound absorption coefficients (>0.99) with broadband spectra, damage-tolerant behavior, high specific strength (up to 81.2 MPa·cm3/g), and high specific energy absorption of 40.1 J/g have been realized in this design. The sound absorption capability is attributed to Helmholtz resonance through the pore-and-cavity morphology of the structure. Microscopically speaking, dissipation primarily occurs via the viscous frictional flow and thermal boundary layers on the air and microlattice interactions at the narrow pores. The high strength is in turn attributed to the near-membrane state of stress in the plate structures and the excellent strength of the base material. Overall, this work presents a new design concept for developing multifunctional metamaterials.

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Section: Resultsmentioning

confidence: 68%

New Class of Multifunctional Bioinspired Microlattice with Excellent Sound Absorption, Damage Tolerance, and High Specific Strength

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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“…As for the method (2), the hybrid TLMs that obtained by combining two or more different types of RVUs exhibited superior compression and energy absorption properties compared to TLMs composed of a single type of RVU [22,[27][28][29]. Al-Saedi et al [27] obtained a F2BCC TLM based on the hybrid design method, and its meso-structure was composed of the BCC and FCC RVUs.…”

Section: Introductionmentioning

confidence: 99%

“…Sun et al [28] proposed and examined the novel hybrid TLM which combined the geometrical features of both octet and bending-dominated RVUs. Xiao et al [29] combined octet unit and rhombic dodecahedron unit, and the hybrid TLM exhibited superior energy absorption capacity.…”

Section: Introductionmentioning

confidence: 99%

Compression and energy absorption properties of the truss-like lightweight materials based on symmetric groups

et al. 2023

Mater. Res. Express

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Truss-like lightweight materials (TLMs) have been widely used in aeronautics and astronautics, because of excellent mechanical property and superior energy absorption capability. The design of TLMs’ meso-structures was a critical task to improve its performance. Hence, a structure design method based on the symmetric groups was proposed for TLMs, and a novel hexagonal prism TLM’s meso-structure was deduced by the symmetric and translational operations of the space group P6mm. To investigate the performance of the novel TLM, the mechanical analysis model was established. The predictive equations of compression performance was proposed based on Euler-Bernoulli beam theory. The stress distribution of the novel TLM’s meso-structure under compression load was discussed by the finite element analysis method, and its compression and energy absorption properties were investigated. The simulation results were in agreement with the predictive results. In addition, the common FCC and BCC TLMs were discussed using the symmetry group analysis method, and their compression properties were predicted. The results showed that the proposed novel TLM in this study had better compression property than BCC and FCC TLMs at the same relative density.

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“…Mitigating the PYS can further improve this ability. Thus, many efforts have been made in this regard, including the introduction of irregular ( 7 ), heterogeneous ( 8 ), or hybrid structures ( 9 ) in stretching-dominated lattices. These measures are effective in reducing the PYS to some extent, but often at the expense of yield strength.…”

Section: Introductionmentioning

confidence: 99%

Post-yield softening of bending-dominated metal metamaterials

Zhong

Das

et al. 2023

PNAS Nexus

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Post-yield softening (PYS) plays an important role in guiding the design of high-performance energy-absorbing lattice materials. PYS is usually restricted to lattice materials that are stretching-dominated according to the Gibson-Ashby model. Contrary to this long-held assumption, this work shows that PYS can also occur in various bending-dominated Ti-6Al-4V lattices with increasing relative density. The underlying mechanism for this unusual property is elucidated using the Timoshenko-beam theory. It is attributed to the increase in stretching and shear deformation with increasing relative density, thereby increasing the tendency towards PYS. The finding of this work extends perspectives on PYS for the design of high-performance energy-absorbing lattice materials.

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Compressive performance and energy absorption of additively manufactured metallic hybrid lattice structures

Cited by 101 publications

References 57 publications

New Class of Multifunctional Bioinspired Microlattice with Excellent Sound Absorption, Damage Tolerance, and High Specific Strength

New Class of Multifunctional Bioinspired Microlattice with Excellent Sound Absorption, Damage Tolerance, and High Specific Strength

Compression and energy absorption properties of the truss-like lightweight materials based on symmetric groups

Post-yield softening of bending-dominated metal metamaterials

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