Acoustic Properties of 316L Stainless Steel Lattice Structures Fabricated via Selective Laser Melting

Sun, Xiaojing; Jiang, Fengchun; Wang, Jiandong

doi:10.3390/met10010111

Cited by 16 publications

(8 citation statements)

References 35 publications

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“…This also implies that fluorite‐truss mainly functions as a Helmholtz resonator under sound absorption. This is in contrast to the works in literature whereby truss microlattices are mainly found to work based on airflow resistivity, that is, working principles fit using the Johnson–Champoux and Allard model, [ 33 ] Delany–Bazley model and general viscothermal models, [ 15,16 ] etc. For instance, open‐cell metallic foams, as approximated to be a tetrakaidecahedron lattice structure in the work of Zhai et al., [ 12b ] show to function based on the Delany–Bazley model.…”

Section: Further Discussionmentioning

confidence: 62%

“…It can be seen that the cascaded resonant cell theorem is in turn multiple geometrical parameters dependent in contrast to the single pore size parameter of the Delany–Bazley model. One main difference between the fluorite‐truss and that reported in literature, for example, inverse spherical struts, [ 33 ] dode medium, [ 16 ] tetrakaidecahedron, [ 12b ] etc., will be the extremely high connectivity, that is, strut‐to‐node ratio, of the fluorite‐truss. The extremely high connectivity of the fluorite‐truss actually renders it to be approximal as a fluorite‐plate but with a higher occurrence of micro‐pores.…”

Section: Further Discussionmentioning

confidence: 99%

“…Traditionally studied absorbers are usually based on foams, [ 12 ] honeycombs, [ 13 ] and perforated plate structures. [ 14 ] Kelvin cell, [ 15 ] dode‐medium, [ 16 ] spherical cavity, [ 17 ] and TPMS [ 18 ] microlattices have been explored for possibilities as sound absorbers. Potentials have been realized, along with the microlattice architecture and dimensions being observed to have notable influences on the absorption coefficients.…”

Section: Introductionmentioning

confidence: 99%

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Microlattice Metamaterials with Simultaneous Superior Acoustic and Mechanical Energy Absorption

Chua

et al. 2021

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The advent of 3D printing brought about the possibilities of microlattice metamaterials as advanced materials with the potentials to surpass the functionalities of traditional materials. Sound absorbing materials which are also tough and lightweight are of particular importance as practical engineering materials. There are however a lack of attempts on the study of metamaterials multifunctional for both purposes. Herein, we present four types of face‐centered cubic based plate and truss microlattices as novel metamaterials with simultaneous excellent sound and mechanical energy absorption performance. High sound absorption coefficients nearing 1 and high specific energy absorption of 50.3 J g−1 have been measured. Sound absorption mechanisms of microlattices are proposed to be based on a “cascading resonant cells theory”, an extension of the Helmholtz resonance principle that we have conceptualized herein. Characteristics of absorption coefficients are found to be essentially geometry limited by the pore and cavity morphologies. The excellent mechanical properties in turn derive from both the approximate membrane stress state of the plate architecture and the excellent ductility and strength of the base material. Overall, this work presents a new concept on the specific structural design and materials selection for architectured metamaterials with dual sound and mechanical energy absorption capabilities.

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Section: Further Discussionmentioning

confidence: 62%

Section: Further Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Microlattice Metamaterials with Simultaneous Superior Acoustic and Mechanical Energy Absorption

Chua

et al. 2021

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“…Sound absorption efficiency is mostly connected with the thickness of the bulk material [ 7 , 8 ]. On the other hand, to improve the effectivity of sound absorbent materials at lower frequencies, this can be compensated by the air space behind the acoustic board [ 1 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of the Pore Shape and Size of 3D-Printed Open-Porous ABS Materials on Sound Absorption Performance

et al. 2020

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Noise has a negative impact on our environment and human health. For this reason, it is necessary to eliminate excessive noise levels. This paper is focused on the study of the sound absorption properties of materials with open-porous structures, which were made of acrylonitrile butadiene styrene (ABS) material using additive technology. Four types of structures (Cartesian, Octagonal, Rhomboid, and Starlit) were evaluated in this work, and every structure was prepared in three different volume ratios of the porosity and three different thicknesses. The sound absorption properties of the investigated ABS specimens were examined utilizing the normal incidence sound absorption and noise reduction coefficients, which were experimentally determined by the transfer function method using a two-microphone acoustic impedance tube. This work deals with various factors that influence the sound absorption performance of four different types of investigated ABS material’s structures. It was found, in this study, that the sound absorption performance of the investigated ABS specimens is strongly affected by different factors, specifically by the structure geometry, material volume ratio, excitation frequency of an acoustic wave, material’s thickness, and air space size behind the tested sound-absorbing materials.

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“…Lightweight sandwich structures with lattice cores [1,2] and foam cores [3,4] have been widely studied and applied due to their outstanding mechanical performance [5][6][7]. Lattice cored structures such as pyramidal [8,9], corrugated [10,11], Kagome [12], and honeycomb cores [13][14][15] have advantages in load carrying applications; however, after the loading force reaches its peak, core member softening occurs and leads to an immediate and dramatic decline of load-carrying capacity [8].…”

Section: Introductionmentioning

confidence: 99%

Effects of Aluminum Foam Filling on Compressive Strength and Energy Absorption of Metallic Y-Shape Cored Sandwich Panel

Yan

Han

et al. 2020

Metals

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The design of lightweight sandwich structures with high specific strength and energy absorption capability is valuable for weight sensitive applications. A novel all-metallic foam-filled Y-shape cored sandwich panel was designed and fabricated by using aluminum foam as filling material to prevent core member buckling. Experimental and numerical investigation of out-of-plane compressive loading was carried out on aluminum foam-filled Y-shape sandwich panels to study their compressive properties as well as on empty panels for comparison. The results show that due to aluminum foam filling, the specific structural stiffness, strength, and energy absorption of the Y-shape cored sandwich panel increased noticeably. For the foam-filled panel, aluminum foam can supply sufficient lateral support to the corrugated core and vertical leg of the Y-shaped core and causes a much more complicated deformation mode, which cannot occur in the empty panel. The complicated deformation mode leads to an obvious coupling effect, with the stress–strain curve of the foam-filled panel much higher than those of the empty panel and aluminum foam, which were tested separately. Metallic foam filling is an effective method to increase the specific strength and energy absorption of sandwich structures with lattice cores, making it competitive in load carrying and energy absorption applications.

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Acoustic Properties of 316L Stainless Steel Lattice Structures Fabricated via Selective Laser Melting

Cited by 16 publications

References 35 publications

Microlattice Metamaterials with Simultaneous Superior Acoustic and Mechanical Energy Absorption

Microlattice Metamaterials with Simultaneous Superior Acoustic and Mechanical Energy Absorption

Effect of the Pore Shape and Size of 3D-Printed Open-Porous ABS Materials on Sound Absorption Performance

Effects of Aluminum Foam Filling on Compressive Strength and Energy Absorption of Metallic Y-Shape Cored Sandwich Panel

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