A new fabrication method of designed metamaterial based on a 3D-printed structure for underwater sound absorption applications

Baena, Juan Carlos; Wang, Cheng; Fu, Yifeng; Kabir, Imrana I.; Yuen, Anthony; Peng, Zhongxiao; Yeoh, Guan Heng

doi:10.1016/j.apacoust.2023.109221

Cited by 15 publications

(9 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Pei et al (2023) successfully fabricated a metamaterial for a high-performance piezoelectric nanogenerator using the FFF method. FFF has also been used to produce a low-cost terahertz metamaterial absorber exhibiting visible light transparency, broadband absorption, polarisation insensitivity and wide incidence angle (Li et al , 2023) and fabrication of metamaterials for underwater sound absorption applications (Baena et al , 2023). More publications on FFF and metamaterials can be found in literature (Kosic et al , 2020, Lei et al , 2019, Wang et al , 2023), where the main focus has been on properties such as mechanical, optical of the metamaterial and the functionality of the fabricated devices.…”

Section: Introductionmentioning

confidence: 99%

Optimisation of printing parameters of fused filament fabrication and uniaxial compression failure analysis for four-point star-shaped structures

Wambua,

Mwema,

Akinlabi

et al. 2024

RPJ

View full text Add to dashboard Cite

Purpose The purpose of this paper is to present an optimisation of four-point star-shaped structures produced through additive manufacturing (AM) polylactic acid (PLA). The study also aims to investigate the compression failure mechanism of the structure. Design/methodology/approach A Taguchi L9 orthogonal array design of the experiment is adopted in which the input parameters are resolution (0.06, 0.15 and 0.30 mm), print speed (60, 70 and 80 mm/s) and bed temperature (55°C, 60°C, 65°C). The response parameters considered were printing time, material usage, compression yield strength, compression modulus and dimensional stability. Empirical observations during compression tests were used to evaluate the load–response mechanism of the structures. Findings The printing resolution is the most significant input parameter. Material length is not influenced by the printing speed and bed temperature. The compression stress–strain curve exhibits elastic, plateau and densification regions. All the samples exhibit negative Poisson’s ratio values within the elastic and plateau regions. At the beginning of densification, the Poisson’s ratios change to positive values. The metamaterial printed at a resolution of 0.3 mm, 80 mm/s and 60°C exhibits the best mechanical properties (yield strength and modulus of 2.02 and 58.87 MPa, respectively). The failure of the structure occurs through bending and torsion of the unit cells. Practical implications The optimisation study is significant for decision-making during the 3D printing and the empirical failure model shall complement the existing techniques for the mechanical analysis of the metamaterials. Originality/value To the best of the authors’ knowledge, for the first time, a new empirical model, based on the uniaxial load response and “static truss concept”, for failure mechanisms of the unit cell is presented.

show abstract

Section: Introductionmentioning

confidence: 99%

Optimisation of printing parameters of fused filament fabrication and uniaxial compression failure analysis for four-point star-shaped structures

Wambua,

Mwema,

Akinlabi

et al. 2024

RPJ

View full text Add to dashboard Cite

show abstract

“…Large-scale computing and advanced 3D printing manufacturing techniques enable the design of microstructures with fine and complex geometrical features [1]. Examples include cell and lattice structures, which are increasingly being investigated for their high stiffness-to-weight and strength-to-weight ratios, as well as their excellent energy absorption and sound insulation properties [2][3][4][5], and are used in a range of lightweight structures, including in the aerospace, automotive, and military industries. Topology optimisation provides an efficient computational method to find the optimal material distribution in the design domain under specific constraints and to obtain a wide range of geometrical designs for cellular structures.…”

Section: Introductionmentioning

confidence: 99%

Design and Mechanical Properties of Maximum Bulk Modulus Microstructures Based on a Smooth Topology with Grid Point Density

Zhou,

Tao,

Liang

et al. 2024

Aerospace

View full text Add to dashboard Cite

The aim of topology optimisation is to determine the optimal distribution of material phases within the periodic cells of a microstructure. In this paper, the density of grid points under element volume fraction is constructed to replace the finite elements in the traditional SIMP framework, avoiding jagged and blurry boundaries in the computational process due to grid dependence. This is then combined with homogenisation theory, a microstructure topology optimisation algorithm with maximum bulk modulus under prescribed volume constraints is proposed, which can obtain 2D and 3D topologies with smooth boundaries. In addition, a closed form expression for the two-dimensional topological concave edge structure (taking the most typical topology as an example) was derived, and a compression experiment was conducted on the topological microstructure based on 3D metal printing technology. Scanning electron microscopy showed that the powder bonded on the surface of the printed structure was not completely melted and the step effect caused the finite element analysis results to be higher than the experimental results. Overall, the finite element simulation and experimental results of the concave surface structure have good consistency, with high strength and energy absorption effects. Topologies based on grid point density obtain microstructures with smooth boundaries, and the introduction of the Heaviside smoothing function and multiple filtering steps within this algorithm leads to more robust optimisation, facilitating 3D or 4D printing of microstructures that meet specific design requirements and confirming the feasibility of the proposed topology for lightweighting studies.

show abstract

“…The sound absorption performance of GFAR was considerably higher than that of common foam geopolymers due to the bridging effect between voids and the inherent sound absorption performance of the silica aerogel. As a common damping elastomer, thermoplastic polyurethane (TPU) is widely used in vibration reduction and underwater sound absorption. , However, the application of TPU in air sound absorption is limited by its impermeability. Therefore, porous TPU microstructures can be constructed in PIF pores with moderate opening degrees to combine multiple sound absorption mechanisms for enhancing sound energy dissipation.…”

Section: Introductionmentioning

confidence: 99%

“…As a common damping elastomer, thermoplastic polyurethane (TPU) is widely used in vibration reduction and underwater sound absorption. 40,41 However, the application of TPU in air sound absorption is limited by its impermeability. Therefore, porous TPU microstructures can be constructed in PIF pores with moderate opening degrees to combine multiple sound absorption mechanisms for enhancing sound energy dissipation.…”

Section: Introductionmentioning

confidence: 99%

Formation of Interpenetrating-Phase Composites Based on the Combined Effects of Open-Cell PIF and Porous TPU Microstructures for Enhanced Mechanical and Acoustical Characteristics

Ren,

Wang,

Sun

et al. 2023

ACS Appl. Polym. Mater.

View full text Add to dashboard Cite

The open-cell foam is a highly preferred soundabsorbing material used for improving indoor sound quality. Herein, polyimide foam (PIF) with an open-cell structure was synthesized through the introduction of oxalic acid dihydrate (H 2 C 2 O 4 •2H 2 O). The introduction and subsequent decomposition of H 2 C 2 O 4 •2H 2 O provided additional heterogeneous nucleation sites during foaming and promoted the formation of open-cell structures. The relation between H 2 C 2 O 4 •2H 2 O content and pore structure, the formation mechanism of open-cell structures, and the effect of H 2 C 2 O 4 •2H 2 O content on the sound absorption performance were analyzed. Furthermore, interpenetrating-phase thermoplastic polyurethane (TPU)/PIF composites were prepared via non-solvent-induced phase separation on the basis of the open-cell PIF. The formation of porous TPU microstructures and improvement of mechanical and acoustic properties of the interpenetrating-phase composites were discussed. Two main forms of TPU existed in the interpenetrating composites: microparticle TPU structure and microporous TPU structure. The compression strength (125.54 kPa) and sound insulation capacity of 10%TPU/PIF3 were 3.47 and approximately 5 times those of open-cell PIF3, respectively. Moreover, the average sound absorption coefficient (1000−6400 Hz) increased by 58.43% compared to that of opencell PIF3. The design based on the open-cell PIF promoted the enrichment of internal channels, and the construction of the internal channels with porous TPU microstructures achieved reflection enhancement and viscoelastic damping dissipation. Finally, the combined effects of the two designs synchronously enhanced the mechanical properties, sound absorption, and sound insulation properties of TPU/PIF materials, providing a thought for improving the acoustic properties of serialized polymer foam materials.

show abstract

A new fabrication method of designed metamaterial based on a 3D-printed structure for underwater sound absorption applications

Cited by 15 publications

References 43 publications

Optimisation of printing parameters of fused filament fabrication and uniaxial compression failure analysis for four-point star-shaped structures

Optimisation of printing parameters of fused filament fabrication and uniaxial compression failure analysis for four-point star-shaped structures

Design and Mechanical Properties of Maximum Bulk Modulus Microstructures Based on a Smooth Topology with Grid Point Density

Formation of Interpenetrating-Phase Composites Based on the Combined Effects of Open-Cell PIF and Porous TPU Microstructures for Enhanced Mechanical and Acoustical Characteristics

Contact Info

Product

Resources

About