Effects of cell size vs. cell-wall thickness gradients on compressive behavior of additively manufactured foams

Duan, Yu; Yi, Ding; Li, Yong; Hou, Naidan; Zhao, Xianhang; Liu, Huifang; Zhao, Zhenqiang; Hou, Bing; Li, Yulong

doi:10.1016/j.compscitech.2020.108339

Cited by 27 publications

(18 citation statements)

References 43 publications

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“…This is why the foam structure and morphology, such as the cell size and cell size distribution, are important factors to determine the overall (macroscopic) thermal insulation behavior [ 21 ]. Recent works also claimed that the spatial distribution and gradient of cell size can have a significant effect on these foam characteristics [ 22 , 23 ].…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Thermal Properties of Functionally Graded Polyolefin Elastomer Foams

Rostami‐Tapeh‐Esmaeil

Shojaei

Rodrigue

2022

Polymers

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In this work, uniform and graded polyolefin elastomer (POE) foams were prepared using a single-step technology based on a fixed chemical blowing agent (azodicarbonamide) concentration of 4 phr (parts per hundred rubber). The effect of molding temperature, including the average temperature (Tavg) and temperature difference (ΔT), on the foams’ morphology, mechanical properties (tension, compression and hardness) and thermal conductivity was investigated. Two series of samples were produced by fixing Tavg with different ΔT or setting different ΔT, leading to different Tavg. The morphological analyses showed that two or three regions inside the foams were produced depending on the molding conditions, each region having different cellular structure in terms of cell size, cell density and cell geometry. The results obtained for the conditions tested showed a range of density (0.55–0.72 g/cm3), tensile modulus (0.44–0.70 MPa) and compression elastic modulus (0.35–0.71 MPa), with a thermal conductivity between 0.125 and 0.180 W/m.K. Based on the information provided, it can be concluded that the foam’s properties can be easily controlled by the cellular structure and that graded samples are more interesting than uniform ones, especially for thermal insulation applications, such as packaging, construction, transportation, automotive and aerospace industries.

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Section: Introductionmentioning

confidence: 99%

Mechanical and Thermal Properties of Functionally Graded Polyolefin Elastomer Foams

Rostami‐Tapeh‐Esmaeil

Shojaei

Rodrigue

2022

Polymers

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“…Most commonly used finite-element models of foam materials, usually based on idealized solid element modeling, cannot describe the dynamic changes in the microstructure of porous materials [ 1 , 24 ]. Liang et al [ 25 , 26 ] studied the dynamic response of and energy absorption by double-layer aluminum foam sandwich panels under explosion loads through experiments and 2D-Voronoi numerical simulations.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Response of Sandwich Tubes with Continuously Density-Graded Aluminum Foam Cores under Internal Explosion Load

Wang

et al. 2022

Materials

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In this paper, the dynamic response of continually density-graded aluminum foam sandwich tubes under internal explosion load was studied. A 3D mesoscopic finite-element model of continually density-graded aluminum foam sandwich tubes was established by the 3D-Voronoi technology. The finite-element results were compared with the existing experimental results, and the rationality of the model was verified. The influences of the core density distribution, the core density gradient, and the core thickness on the blast resistance of the sandwich tubes were analyzed. The results showed that the blast resistance of the sandwich tube with the negative-gradient core is better than that of the sandwich tube with the uniform core. While the blast resistance of the sandwich tube with the positive-gradient core or the middle-hard-gradient core is worse than that of the sandwich tube with the uniform core. For the sandwich tube with the negative-gradient core, the core density gradient increased, and the blast resistance decreased. Increasing the thickness of the core can effectively decrease the deformation of the outer tube of the sandwich tube, but the specific energy absorption of both the whole sandwich tube and its core also decreases.

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“…Foams, particularly gradient metal foams, are important functional materials that offer advantages such as low weight and high specific strength and energy absorption efficiency [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 ]. They are widely used in applications requiring superior energy absorption and structural protection [ 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 ]. Their unique energy absorption properties are strongly dependent on the cell structure; therefore, several studies have focused on this aspect.…”

Section: Introductionmentioning

confidence: 99%

Study on the effect of the size irregularity gradient of metal foams on macroscopic compressive properties

Zhang¹,

Tang²,

Yang³

et al. 2022

Heliyon

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Effects of cell size vs. cell-wall thickness gradients on compressive behavior of additively manufactured foams

Cited by 27 publications

References 43 publications

Mechanical and Thermal Properties of Functionally Graded Polyolefin Elastomer Foams

Mechanical and Thermal Properties of Functionally Graded Polyolefin Elastomer Foams

Dynamic Response of Sandwich Tubes with Continuously Density-Graded Aluminum Foam Cores under Internal Explosion Load

Study on the effect of the size irregularity gradient of metal foams on macroscopic compressive properties

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