Micro–macro investigation of deformation and failure in closed-cell aluminum foams

Kadkhodapour, Javad; Raeisi, Sajjad

doi:10.1016/j.commatsci.2013.10.017

Cited by 59 publications

(37 citation statements)

References 16 publications

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“…[2,10]. Mechanical properties of aluminum foams are influenced by their relative density [9,11], matrix [12,13], the microstructure of the cell walls [14], cell shapes [15] and cell size [16]. These factors are largely related to the preparation methods of closed-cell aluminum foams [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

“…The energy absorption performance of the aluminum foam is related to the failure modes of cells [35]. The modes usually contain the formation of plastic hinges, tearing, fracture and buckling of cell membranes [15,35]. At present, methods for characterizing cell deformation mainly include photographs of the deformation process [30], scanning electron microscope (SEM) [36], and X-ray tomography [33,37,38].…”

Section: Introductionmentioning

confidence: 99%

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Compressive performance and deformation mechanism of the dynamic gas injection aluminum foams

Wang

Maire

Chen

et al. 2019

Materials Characterization

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The dynamic gas injection method with high-speed horizontal oscillation could reduce the cell size and improve the cell quality of aluminum foams, so it is of interest to study the compressive performance and deformation mechanism of the foams produced with this process. In-situ compression in X-ray tomography was used for this research. Results have shown that the plateau stresses of bulk aluminum foams prepared by the dynamic gas injection method are in the range of 0.3 ~ 11 MPa. When the cell size is reduced to around 1 mm, the plateau stress could reach 22 MPa. In addition, the brittle deformation characteristics of aluminum foams in the quasi-static compression process are obvious. The dynamic gas injection method could greatly improve the mechanical properties of aluminum foams, and aluminum foams prepared by this method have a better compressive performance compared to that prepared by static method even at the same relative density. The uniformity of the cell size and sphericity also affects the mechanical properties. The result of in-situ compression shows that there are two main failure modes for cell walls of aluminum foams: the fracture after buckles of the cell walls and the direct fracture of the cell walls. The aluminum foams prepared by the dynamic gas injection method could have a wide application prospect due to its superior compressive performance.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Compressive performance and deformation mechanism of the dynamic gas injection aluminum foams

Wang

Maire

Chen

et al. 2019

Materials Characterization

View full text Add to dashboard Cite

show abstract

“…Similar to most of the cellular structures, deformation bands emerged by growing the compressive strain. The bands developed with the angle between 20 and 35 degree [18] which ensuing the sliding of porous layer on one another shown in Figure 11.d. The shear stress due to sliding layer decreased the reaction force of the deformed structure appeared as softening region in Figure 6 .…”

Section: Resultsmentioning

confidence: 95%

The Effect of the Cell Shape on Compressive Mechanical Behavior of 3D Printed Extruded Cross-sections

Raeisi

Tovar

2018

SAE Technical Paper Series

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Additive manufacturing has been a promising technique for producing sophisticated porous structures. The pore's architecture and infill density percentage can be easily controlled through additive manufacturing methods. This paper reports on development of sandwich-shape extruded cross sections with various architecture. These lightweight structures were prepared by employing additive manufacturing technology. In this study, three types of cross-sections with the same 2-D porosity were generated using particular techniques. a) The regular cross section of hexagonal honeycomb, b) The heterogeneous pore distribution of closed cell aluminum foam cross section obtained from image processing and c) linearly patterned topology optimized 2-D unit cell under compressive loading condition. The optimized unit cell morphology is obtained by using popular two-dimensional topology optimization code know as 99-line code, and by having the same volume fraction as the heterogeneous foam. The upper edge of the unit cell was under distributed uniform loading and the lower edge was fixed. All the cross sections have the same cavity to wall area ratio on their 2-D configuration. The samples are extruded to produce 3-D CAD model of sandwich shape porous structures. The different samples are tested with universal compression machine and mechanical characteristics of the models are investigated. Furthermore, the energy absorption efficiency and load bearing capability of samples are studied. The results of the experimental procedure are compared to numerical simulations under quasi-static condition.

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“…Basically, the foams experience a uniform deformation with progressive collapse of cells until the deformation becomes localized in shear bands. The shear bands, which typically form at the angles ranging from 25°to 45° [56][57][58], are marked in Fig. 3d with dashed black lines.…”

Section: Quasi-static Compressionmentioning

confidence: 99%

In situ manufacturing and mechanical properties of syntactic foam filled tubes

et al. 2016

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Micro–macro investigation of deformation and failure in closed-cell aluminum foams

Cited by 59 publications

References 16 publications

Compressive performance and deformation mechanism of the dynamic gas injection aluminum foams

Compressive performance and deformation mechanism of the dynamic gas injection aluminum foams

The Effect of the Cell Shape on Compressive Mechanical Behavior of 3D Printed Extruded Cross-sections

In situ manufacturing and mechanical properties of syntactic foam filled tubes

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