Analytical Solution for Crushing Behavior of Closed Cell Al-Alloy Foam

Tunvir, K.; Kim, A.; Cheon, Seong Sik

doi:10.1080/15376490600845660

Cited by 8 publications

(5 citation statements)

References 10 publications

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“…In order to more realistically simulate the cell structure of actual aluminum foam, the basic unit shape of this representative model has also been gradually improved. Representative models of closed-cell aluminum foam have successively developed such ideal models as the Kalman model (tetrahedral model) [20,25,26], octahedral model [27], more complex cube to pyramid model [28], cube to sphere model [28,29], all of which use uniform pores, cell walls, and prisms. e main drawback of this method is that it cannot reflect the randomness of the microstructure of aluminum foam.…”

Section: Introductionmentioning

confidence: 99%

Explosion Resistance of Three-Dimensional Mesoscopic Model of Complex Closed-Cell Aluminum Foam Sandwich Structure Based on Random Generation Algorithm

Wang

Xie

et al. 2020

Complexity

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According to the randomness of the spatial distribution and shape of the internal cells of closed-cell foam aluminum and based on the Voronoi algorithm, we use ABAQUS to model the random polyhedrons of pore cells firstly. Then, the algorithm of generating aluminum foam with random pore size and random wall thickness is written by Python and Fortran, and the mesh model of random polyhedral particles and random wall thickness was established by the algorithm read in by TrueGrid software. Finally, the mesh model is impo rted into the LS-DYNA software to remove the random polyhedron part of the pore cell. Compared with the results of scanning electron microscopy and antiknock test, the morphology and properties of the model are close to those of the real aluminum foam material, and the coincidence degree is more than 91.4%. By means of numerical simulation, the mechanism of the wall deformation, destruction of closed-cell aluminum foams, and the rapid attenuation of explosion stress wave after the interference of reflection and transmission of bubbles were studied and revealed. It is found that aluminum foam deformation can be divided into four areas: collapse area, fracture area, plastic deformation area, and elastic deformation region. Therefore, the explosion resistance is directly related to the cell wall thickness and bubble size, and there is an optimal porosity rule for aluminum foam antiknock performance.

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Section: Introductionmentioning

confidence: 99%

Explosion Resistance of Three-Dimensional Mesoscopic Model of Complex Closed-Cell Aluminum Foam Sandwich Structure Based on Random Generation Algorithm

Wang

Xie

et al. 2020

Complexity

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show abstract

“…Development, design, manufacturing, characterization, and application of conventional cellular materials and structures is of significant importance in engineering in recent years [1][2][3][4][5][6]. New fabrication methods of cellular materials and structures have been developed for their more convenient and flexible use in different engineering applications [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Advanced Pore Morphology Foam Elements

Vesenjak

Gačnik

Krstulović‐Opara

2014

Mechanics of Advanced Materials and Structures

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Advanced pore morphology (APM) foam, consisting of sphere-like metallic foam elements, exhibits some particular mechanical properties with unique application possibilities. The article presents the results of experimental and computational testing of APM foam elements to determine their mechanical behavior under quasi-static and dynamic compressive loading conditions. Additionally, an infrared thermal imaging camera has been used during experimental testing. Evaluated mechanical properties give better insight into the behavior of single APM foam elements under different types of loading and provide a good base for further studies of the topology and morphology influence on the global behavior of composite structures, based on APM foam elements.

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“…Recently, advanced flexible tactile sensors have been widely studied for their promising application prospects in wearable devices, [1] electronic skin (E-skin), [2,3] intuitive human-machine interaction, [4][5][6] human healthcare monitoring, [7,8] and soft robots. [9] Compared with resistive, [10,11] piezoelectric, [12][13][14][15][16] and triboelectric [17][18][19] tactile sensors, capacitive tactile sensors [20][21][22][23][24][25][26] are commonly used where stable static pressure detection with low temperature influence at low energy consumption is required. [8] Capacitive tactile sensors have simple device architecture with a pair of parallel conductive electrodes sandwiching a deformable dielectric layer, and a capacitive readout would rise along with the induced change of the separation distance between electrodes upon application of a pressure load.…”

Section: Introductionmentioning

confidence: 99%

Tailorable Capacitive Tactile Sensor Based on Stretchable and Dissolvable Porous Silver Nanowire/Polyvinyl Alcohol Nanocomposite Hydrogel for Wearable Human Motion Detection

Wang

et al. 2021

Adv Materials Inter

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Recently, advanced flexible tactile sensors have been widely studied for human motion detection, which is an essential part of human healthcare monitoring. New types of materials with novel composition and structures play a significant role in sensing performance improvement. Herein, a stretchable and dissolvable porous silver nanowire (Ag NW)/polyvinyl alcohol (PVA) nanocomposite hydrogel is fabricated through a facile foaming and freezing‐thawing combined approach. The PVA gel is foamed with lots of tailorable micropores to achieve much enhanced stretchability and compressibility. Ag NWs are uniformly embedded inside PVA matrix to increase the permittivity upon introduction of numerous microcapacitors. Incorporated with carbon nanotube network electrodes, a capacitive tactile sensor is developed with high sensitivity (1.9 kPa−1), wide detection range (250 kPa), quick response time (25 ms), and remarkable stability over 10 000 loading/unloading cycles. Wearable sensing demonstration of detecting various human motions is performed. The hydrogel‐based sensor can be dissolved in hot water within minutes with recycling use of electrode material, which is environmentally friendly. A large‐area integrated sensor sheet can be made upon one fabrication process followed by cut into small sensor devices with desired shapes, indicating potential customized mass production. The proposed microporous nanocomposite hydrogel‐based sensor is promising in wearable sensing applications.

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Analytical Solution for Crushing Behavior of Closed Cell Al-Alloy Foam

Cited by 8 publications

References 10 publications

Explosion Resistance of Three-Dimensional Mesoscopic Model of Complex Closed-Cell Aluminum Foam Sandwich Structure Based on Random Generation Algorithm

Explosion Resistance of Three-Dimensional Mesoscopic Model of Complex Closed-Cell Aluminum Foam Sandwich Structure Based on Random Generation Algorithm

Mechanical Properties of Advanced Pore Morphology Foam Elements

Tailorable Capacitive Tactile Sensor Based on Stretchable and Dissolvable Porous Silver Nanowire/Polyvinyl Alcohol Nanocomposite Hydrogel for Wearable Human Motion Detection

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