Mechanically robust 3D printed elastomeric lattices inspired by strong and tough hierarchical structures

Thirunavukkarasu, Naveen; Gao, Jianhong; Peng, Shuqiang; Laroui, Abdelatif; Wu, Lixin; Weng, Zixiang

doi:10.1016/j.addma.2023.103451

Cited by 8 publications

(3 citation statements)

References 63 publications

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“…Based on hybrid additive manufacturing combining fused deposition modeling (FDM) 3D printing and ultrasonic treatment, Li et al [17] fabricated TPU flexible auxetic structure strain sensors with embedded CNTs to achieve stability and high sensitivity. Inspired by hierarchical structures, it has been proven that the toughness of 3D printed elastomeric lattice structures can be enhanced [18]. Nevertheless, the toughness and stretchability of UV-curable 3D printed elastomer in-plane structure patterns with LCD 3D printing have not yet been studied.…”

Section: Introductionmentioning

confidence: 99%

Designing for strength: enhancing mechanical performance through structured patterns in 3D printed elastomer

Zou,

Song,

Liu

2023

Mater. Res. Express

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The mechanical performance of 3D printed elastomers is crucial for various applications including soft robotics, wearable devices, and biomedical engineering. This study investigates the impact of different structured patterns, namely vertical and crosswise vertical SC, on the strength and mechanical performance of 3D printed elastomers. Through a series of experimental tests and numerical simulations, it was found that the cross-shaped structure exhibited the best strength among the tested patterns. This enhanced performance can be attributed to the unique arrangement of the crosswise structure, which effectively distributes stress and reduces strain concentration. The findings of this study provide valuable insights into the design and fabrication of high-performance 3D printed elastomers, paving the way for the development of advanced materials and devices with improved mechanical properties.

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Section: Introductionmentioning

confidence: 99%

Designing for strength: enhancing mechanical performance through structured patterns in 3D printed elastomer

Zou,

Song,

Liu

2023

Mater. Res. Express

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“…[25] Additionally, several groups have demonstrated the fabrication of elastomeric micro-structural composite lattices with excellent properties by using 3D printing technologies. [8,[26][27][28] In an instance, Duoss et al reported a 3D printed porous, elastomeric architectures with mechanical properties governed by the ordered arrangement of sub-millimeter structures. [29] Similarly, porous elastomeric lattices with expected electrical and electro-mechanical properties were also fabricated through 3D printing.…”

Section: Introductionmentioning

confidence: 99%

Additive Manufacturing of Elastomeric Composite Lattices with Thermally Grown Micro‐Architectures for Versatile Applications

Tang,

Xue,

et al. 2023

Adv Materials Technologies

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Microengineering of materials plays an important role in achieving multifunctionality and enhancing performance. However, it is still a major challenge to construct secondary micro‐architectures in composite lattices to date. Herein, a novel microengineering strategy of combining additive manufacturing and thermo‐growth processes is proposed to develop elastomeric composite lattices with micro‐architectures throughout the filaments for versatile applications. The new printing inks are composed of elastomeric matrices, closed‐cell microspheres and carbon nanotubes (CNTs). After printing, microspheres “grow” to form secondary micro‐architectures inside by applying thermal treatment. Such thermo‐growth offers a good opportunity to manufacture objects with exceptional and complex micro‐architectures, and few synthetic materials can “grow” like this. Further investigation shows that the obtained microstructured elastomeric composite lattice has an excellent impact energy dissipation capacity by reducing the impact force by 57% owing to the hierarchical energy dissipation mechanisms, and exhibits a distinctively linear electrical response to impact which endows it a self‐sensing capability. In addition, it also shows a good thermal‐insulation performance endowed by mm‐scale pores and µm‐scale hollow spheres, which is comparable to existing composite foams. This study represents an innovative and effective approach for the development of micro‐engineered composite lattices with excellent multifunctional properties for versatile applications.

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“…It was observed that the compressive stress [33], tensile stress [34], impact resistance and energy absorption properties [35,36] of lattice structures fabricated with different composite materials via MJ were significantly strengthened. On the other hand, in addition to the use of composite materials, hybrid designs have also been used in recent years to improve the mechanical properties of these lattice structures [37]. They aimed to strengthen the mechanical properties of the lattice structure by transforming it into a graded form with hybrid designs.…”

Section: Introductionmentioning

confidence: 99%

The Mechanical Properties of Functionally Graded Lattice Structures Derived Using Computer-Aided Design for Additive Manufacturing

Top,

Şahin,

Gökçe

2023

Applied Sciences

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This study aims to investigate the mechanical properties of Functionally Graded Lattice Structures (FGLSs) and to determine their industrial application possibilities through additive manufacturing. For this purpose, lattice structures with uniform and horizontal, vertical and radially graded configurations are designed using auxetic unit cells were fabricated with RGD720 photopolymer resin using Material Jetting. FGLSs are compared with uniform structures in regards with deformation behavior, structural strength and energy absorption. The results showed that the most significant deviation in the strut diameters of the uniform lattice structures was seen in the rotation lattice structure at 8.2%. The lowest deviation was seen in the chiral structure, which deviated by 5.4%. The lowest deviations (between 3.4% and 9%) in FGLSs were obtained in chiral structures. The highest relative density value (0.3049 g/cm3) among all configurations was observed in the vertically graded chiral structure. The lowest relative density value (0.1865 g/cm3) was obtained in uniform re-entrant structures. According to the compression test results, the highest compressive stress (2.61513 MPa) and elastic modulus (84.63192 MPa) were formed in the rotation structure. The maximum energy absorption capacity value (19.381 KJ) and the maximum specific energy absorption value (3649.905 KJ/kg) were obtained in the uniform chiral structure.

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Mechanically robust 3D printed elastomeric lattices inspired by strong and tough hierarchical structures

Cited by 8 publications

References 63 publications

Designing for strength: enhancing mechanical performance through structured patterns in 3D printed elastomer

Designing for strength: enhancing mechanical performance through structured patterns in 3D printed elastomer

Additive Manufacturing of Elastomeric Composite Lattices with Thermally Grown Micro‐Architectures for Versatile Applications

The Mechanical Properties of Functionally Graded Lattice Structures Derived Using Computer-Aided Design for Additive Manufacturing

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