Superior energy absorption characteristics of additively-manufactured hollow-walled lattices

Zhang, Qiao; Li, Bo; Zhou, Sicong; Luo, Min; Han, Fusheng; Chai, Chuanguo; Wang, Jie; Yang, Xianfeng

doi:10.1016/j.ijmecsci.2023.108834

Cited by 8 publications

(1 citation statement)

References 67 publications

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“…FEA plays a crucial role in this framework, particularly in assessing the load capacity and mechanical properties of the designed structures. By simulating the physical behavior under various loading conditions, FEA provides insights into the structural integrity and performance of cellular structures, guiding the optimization process for enhanced functionality and efficiency [9,10]. Implicit techniques, such as topology optimization, use mathematical equations to define shapes, facilitating the efficient handling of complex geometries [11,12].…”

Section: Introductionmentioning

confidence: 99%

Geometric modeling of advanced cellular structures with skeletal graphs

Letov,

Zhao

2024

International Journal of Mechanical Sciences

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Section: Introductionmentioning

confidence: 99%

Geometric modeling of advanced cellular structures with skeletal graphs

Letov,

Zhao

2024

International Journal of Mechanical Sciences

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The Energy Absorption Characteristics and Sound Absorption Behavior of In Situ Integrated Aluminum Lattice Structure Filled Tubes

Wang,

et al. 2024

Adv Eng Mater

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Lattice structures, as integrated structure‐function engineering materials, have developed rapidly in industrial fields. In this study, the in situ integrated solid/hollow aluminum lattice structure filled tubes are designed and manufactured by a selective laser melting technique. The effects of structure parameters on compressive properties, energy absorption, and sound absorption are analyzed. The in situ integrated aluminum lattice structure filled tubes with hollow lattice structure and strengthened hollow lattice structure can achieve a wide adjustment of compressive property (31.04–185.64 MPa) and energy absorption density (11.21–51.70 MJ m−3) in a narrow density range. The compressive property and energy absorption are superior compared with ex situ aluminum lattice structure filled tubes due to the interaction and metallurgical bonding between the thin‐walled tubes and the aluminum lattice structures. The hollow structure design and altering its structure parameters can regulate the sound absorption coefficient and the corresponding peak frequency (the highest absorption peak is 0.723 at 2098 Hz). In addition, the hollow structure design can realize double absorption peaks (0.360 at 1462 Hz and 0.503 at 2122 Hz), presenting the potential for broadband sound absorption. Eventually, superior integrated energy/sound absorption structures can be obtained by the hollow structure design and its corresponding optimization.

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Adjustable Ultra‐Light Mechanical Negative Poisson's Ratio Metamaterials with Multi‐Level Dynamic Crushing Effects

Xu,

Huang,

et al. 2024

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Mechanical metamaterials with multi‐level dynamic crushing effects (MM‐MLs) are designed in this study through coordinate transformation and mirror arrays. The mechanical effects of the diameter and length ratio of the struts and connecting rods, the Euler angles, and the cell numbers on the mechanical properties are investigated separately. MM‐ML can exhibit significant two‐level platform stress, and the local cells in the first platform stress stage undergo rotational motion, while the second platform stress stage mainly involves collapse compression and bending. Although increasing the length of the connecting rods can increase the range of Poisson's ratio, it will reduce the level of platform stress and energy absorption. Increasing the Euler angle will reduce the strain interval of the first platform stress and can improve the energy absorption capacity. In addition, increasing the cell number while maintaining a constant relative density can effectively enhance energy absorption. MM‐ML has significant parameter controllability, can achieve different platform stress regions, different ranges of Poisson's ratios, and energy absorption requirements according to the application scenario, and can demonstrate functional diversity compared to existing research. The design scheme can provide ideas for adaptive crushing protection requirements.

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Superior energy absorption characteristics of additively-manufactured hollow-walled lattices

Cited by 8 publications

References 67 publications

Geometric modeling of advanced cellular structures with skeletal graphs

Geometric modeling of advanced cellular structures with skeletal graphs

The Energy Absorption Characteristics and Sound Absorption Behavior of In Situ Integrated Aluminum Lattice Structure Filled Tubes

Adjustable Ultra‐Light Mechanical Negative Poisson's Ratio Metamaterials with Multi‐Level Dynamic Crushing Effects

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