Clues for Cellular Structure Optimization in Aluminum Foams

Lázaro, Jaime; Solórzano, E.; Rodríguez‐Pérez, Miguel Ángel

doi:10.1002/adem.201600496

Cited by 2 publications

(3 citation statements)

References 22 publications

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“…[1] A range of different materials, new manufacturing processes, and optimized pore structures have been developed recently. [2][3][4][5][6] Metal foams are cellular materials mimicking the structure of femur bone or wood. [7] This cellular design concept combines lightweight construction through material savings with a high specific stiffness.…”

Section: Introductionmentioning

confidence: 99%

“…Although the origin of metal foams dates back to the 1950s, this class of material has gained considerable attention during the last few decades . A range of different materials, new manufacturing processes, and optimized pore structures have been developed recently . Metal foams are cellular materials mimicking the structure of femur bone or wood .…”

Section: Introductionmentioning

confidence: 99%

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Investigation of Strain‐Rate Effects in Ni/PU Hybrid Foams under Low‐Impact Velocities

et al. 2020

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Metal foams are often used as energy absorbers and lightweight materials. Inspired by a natural blueprint, open‐cell metal foams can significantly reduce the mass of a structure. The innovative manufacturing process of electrodeposition provides the possibility to customize the coating layer thickness of nickel (Ni) on a polyurethane (PU) precursor foam. Consequently, the mechanical properties can be adjusted according to the requirements of the expected application. Herein, quasistatic compression tests and low‐velocity impact tests are conducted on open‐cell Ni/PU hybrid foams to investigate the strain‐rate effects for strain rates in the range of 10−3 to 550 s−1. Furthermore, digital image correlation is performed with the intention of comparing the micromechanical deformation mechanisms under quasistatic loading with those under dynamic loading. For the first time, the heat evolution at different impact velocities of metal foams has been investigated with an infrared camera.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigation of Strain‐Rate Effects in Ni/PU Hybrid Foams under Low‐Impact Velocities

et al. 2020

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“…X‐ray tomography makes it possible to obtain the 3D cell structure of aluminum foam non‐destructively . If the cell deformation and failure can be predicted by the initial cell structure, an optimized direction of foam structure could be provided for preparation, and then, the mechanical properties could be improved . Moreover, the first failure region of an aluminum foam piece could be known in advance and prevented through reinforcement, which is significant for applications.…”

Section: Introductionmentioning

confidence: 99%

Study on Cell Deformation of Low Porosity Aluminum Foams under Quasi‐Static Compression by X‐Ray Tomography

et al. 2020

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Understanding the correlation between cell deformation and initial cell structure during compression is important for improvement and development of effective applications of aluminum foams. Foams with porosities lower than 75% now get more attention because of more spherical cells and better mechanical performance. Herein, two low porosity aluminum foam samples are deformed by a compressive device allowing simultaneous X‐ray tomography. The foam cell structures in the initial undeformed state and in the state, where the first batch of cells deforms, are characterized and correlated. The absolute value of anisotropy change is selected as the most sensitive parameter to evaluate the cell deformation. A fitting formula between the cell deformation degree and the initial cell parameters is obtained, which can predict the cell deformation degree. It is found that a cell with small anisotropy, large angle between the longest axis of the cell and the loading direction, small sphericity, more neighbors, and large cell size is more prone to deform during compression. With the fitting formula, the weakest region where the first batch of deformed cells occurs can be predicted. The influence of cell morphology parameters in low porosity aluminum foams is significant and verified by experimental results.

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Clues for Cellular Structure Optimization in Aluminum Foams

Cited by 2 publications

References 22 publications

Investigation of Strain‐Rate Effects in Ni/PU Hybrid Foams under Low‐Impact Velocities

Investigation of Strain‐Rate Effects in Ni/PU Hybrid Foams under Low‐Impact Velocities

Study on Cell Deformation of Low Porosity Aluminum Foams under Quasi‐Static Compression by X‐Ray Tomography

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