Multiscale optimization of specific elastic properties and microscopic frequency band-gaps of architectured microtruss lattice materials

Gasparetto, Victor E. L.

doi:10.1016/j.ijmecsci.2021.106320

Cited by 26 publications

(6 citation statements)

References 65 publications

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“…For the first aspect of the structural property, the multiscale and multiobjective optimization design method was applied in the design of functional material honeycomb structures. Starting from the geometry of the truncated section of the honeycomb beam, the coordination relationship between the stiffness, strength, and relative density of the honeycomb beam was analyzed from the macroscopic characterization of size parameters and the micromechanical principle [6]. e anisotropic characteristics of the porous material were analyzed.…”

Section: Introductionmentioning

confidence: 99%

Optimal Design of Honeycomb Beams with Unit Cell Structure Based on Multiobjective Optimization Algorithm

Feng

Sun

Chen

et al. 2022

Security and Communication Networks

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In order to promote the development of honeycomb composite reinforcements, the mechanical properties and optimization methods of honeycomb beams are studied. A structural optimization design method is proposed based on natural frequency and stiffness and the lightest weight. According to the vibration frequencies and mechanical analysis, the equivalent density and equivalent stiffness of the section in the unit length are deduced, which is considered a typical example. The geometric parameters of the structure system are trained by multiobjective optimization minimax algorithm (MOMA), and the Pareto optimal solution of variable combination is obtained. The results show that optimized objects are significantly better than that previously. Therefore, the optimized scheduling algorithm has some reference value and prospects for practical application.

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Section: Introductionmentioning

confidence: 99%

Optimal Design of Honeycomb Beams with Unit Cell Structure Based on Multiobjective Optimization Algorithm

Feng

Sun

Chen

et al. 2022

Security and Communication Networks

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“…For periodic structural materials, wave and finite element methods have been developed to study the frequency band characteristics of wave propagation throughout the entire structure. By solving the representative unit cell models and applying the principle of periodic extension, the frequency band characteristics of wave propagation can be obtained [ 25 , 26 , 27 ]. For non-periodic materials, such as foams, structural generation algorithms can be conveniently used to obtain finite element models based on parameter constraints [ 28 , 29 ].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Wave Propagation Characteristics in Entangled Metallic Wire Materials by Acoustic Emission

Liang

Wang

et al. 2023

Materials

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In this paper, the response characteristics of wave propagation in entangled metallic wire materials (EMWMs) are investigated by acoustic emission. The frequency, amplitude of wave emission, and the pre-compression force of the specimen can be adjusted in the experimental setup. EMWM specimens fabricated from stainless steel wires and with different design parameters are tested in this work. The results show that waves of different amplitudes propagate in EMWMs with approximate linear characteristics and the fluctuation coefficient of wave passing ratios is calculated below 15%. The response spectrum of passing waves shows a distinct single-peak characteristic, with the peak response at approximately 14 kHz. The parameters of pre-compression force, porosity, wire diameter, helix diameter, specimen height, and the layered structure of specimens have no significant effect on the frequency characteristics but moderately affect the wave passing ratios. Notably, EMWMs exhibit a lower wave passing ratio (ranging from 0.01 to 0.18) compared to aluminum alloy and natural rubber. The characteristics of response spectrums can be successfully reproduced by the finite element simulation. This work demonstrates EMWMs’ potential as an acoustic frequency vibration isolation material, offering excellent performance and engineering design convenience.

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“…It is urgent to use high-efficiency cooling technology with high structural strength to ensure the safe and reliable operation of blades. Truss structure is a kind of multifunctional topology optimization structure [3]. With the development of 3D printing technology, truss structure has been gradually applied to many industrial fields [4][5].…”

Section: Introductionmentioning

confidence: 99%

Study on flow and heat transfer characteristics of cooling channel filled with x-shaped truss array

Gao

et al. 2023

THERM SCI

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In order to enhance the cooling performance of turbine blades, novel cooling channels filled with X-shaped truss array were investigated in this study. The flow mechanism and heat transfer characteristic of the cooling channel filled with X-shaped truss array were analyzed numerically. The empirical correlations of friction coefficient and Nusselt number related to the inlet Reynolds number (10,000 to 60,000) and truss rod inclination angle (30? to 45?) were fitted. The results show that the secondary flow vortex in the channel and the Nusselt number on the channel wall both show periodic distributions along the streamwise direction. The row-averaged Nusselt number and friction coefficient of the channel first decrease quickly and then decrease slowly along the streamwise direction. When truss rod inclination angle increases from 30? to 60?, the whole-averaged Nusselt number and the whole friction coefficient of the channel increase by 25.4% to 52.3% and 1.19 to 1.33 times respectively under different Reynolds number. The channel with truss rod inclination angle of 45? has the best comprehensive thermal performance. In all cases, the ratio of heat transfer quantity of the truss rod surface to the total heat transfer quantity of the channel ranges from 22.9% to 42.3%. The increase of Reynolds number improves the heat transfer quantity of the channel wall and the increase of truss rod inclination angle reduces the heat transfer quantity of the channel wall.

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Multiscale optimization of specific elastic properties and microscopic frequency band-gaps of architectured microtruss lattice materials

Cited by 26 publications

References 65 publications

Optimal Design of Honeycomb Beams with Unit Cell Structure Based on Multiobjective Optimization Algorithm

Optimal Design of Honeycomb Beams with Unit Cell Structure Based on Multiobjective Optimization Algorithm

Experimental Investigation of Wave Propagation Characteristics in Entangled Metallic Wire Materials by Acoustic Emission

Study on flow and heat transfer characteristics of cooling channel filled with x-shaped truss array

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