Low-velocity impact indentation rate sensitivity of aluminium foams

Sahu, Shantanu Kumar; Reddy, T. Sreekantha; Reddy, G. Jagan; Gokhale, A.M.

doi:10.1016/j.mtcomm.2020.101351

Cited by 8 publications

(3 citation statements)

References 21 publications

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“…The reason for this may be due to the apparent strain rate sensitivity of low-density aluminum foams. Sahu et al [ 27 ] studied the low-velocity impact indentation rate sensitivity of aluminum foam with different densities, and the study showed that densities below 0.53 g.cm 3 have higher velocity sensitivity. The core density of the Group 1 sample can be calculated by subtracting the mass of the front and back panels to give a density of 0.36 g.cm −3 , which is a low-density aluminum foam.…”

Section: Resultsmentioning

confidence: 99%

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Investigation of the Indentation Resistance of Aluminum Foam Sandwich Panels with Metallurgical Bonding Interfaces under Low-Velocity Impact

Gao

Huang

et al. 2023

Materials

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The impact resistance of aluminum foam sandwich panels (AFS) with metallurgical bonding interfaces prepared by the powder cladding rolling method was investigated. Low-velocity impact tests were conducted by using a drop-weight impact facility to explore the dynamic mechanical behavior, deformation and damage mechanisms, and energy absorption of AFS with metallurgical bonding interfaces. The effects of variation of impact energy, panel thickness, and specimen density on the energy absorption performance of AFS were quantitatively evaluated by energy absorption indicators. The results indicate that the load-displacement curve illustrates prominent three-stage characteristics when the impact energy is 120 J containing the front panel yielding stage, the foam core’s compressive and shear failure stage, and the back panel fracture stage. The impact strength of the sandwich structure increases with increasing panel thickness and specimen density. The AFS with metallurgical bonding interfaces presents favorable energy absorption efficiency under low velocity.

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Section: Resultsmentioning

confidence: 99%

“…This can be explained by the fact that the low-density-AFS has a high volume fraction of the gas phase, and the cell’s shape is mainly polygonal, with many weak connections between the cells [ 27 ]. Therefore, the load value is sharply reduced to the valley value under impact loading, showing a clear brittle behavior.…”

Section: Resultsmentioning

confidence: 99%

Investigation of the Indentation Resistance of Aluminum Foam Sandwich Panels with Metallurgical Bonding Interfaces under Low-Velocity Impact

Gao

Huang

et al. 2023

Materials

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show abstract

“…[4][5][6] However, most researchers investigated the rigid or brittle composite materials such as metal foams, which were easily damaged by any impact force and shortened the service life of commodities. [7][8][9] This limits the application range of composite materials and causes the waste of energy to a great extent.…”

Section: Introductionmentioning

confidence: 99%

Bionic micro‐interface lattice foam‐core composites: Manufacturing techniques, compression resistance, bursting strength, low‐velocity impact, and dynamic cushion efficacy

Lin

Wang

et al. 2021

Polymers for Advanced Techs

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This study proposes a high-resilience foam-core composite with bionic micro-interface lattice structure using columnar lattice mold and two-step foaming technique. This foam-core composite uses polyamides nonwoven fabrics as the bionic surface layers and polyurethane foam as the bionic core layer. The foam cavity diameter and columnar interface area are adjusted by the polyols content and the column diameter, respectively. Effects of the cavity diameter and the column diameter on the compression resistance, static-bursting strength, low-velocity impact, and dynamic cushion efficacy of foam-core composites are investigated. The results show that compression resistance, bursting strength, and cushion efficacy of the foam-core composites are all increased by degrees with the cavity diameter when the content of polyols increases.When the cavity diameter was 195 μm, bionic micro-interface foam-core composite absorbed 99% low-velocity impact energy. Existence of bionic micro-interface lattice obviously improved the static compression and bursting properties. Bionic microinterface foam-core composites with 16 mm-diameter column have the lower and wider contact force peak compared to pomelo, 8 mm and 12 mm-diameter column, indicating higher dynamic cushion efficacy. The resulted composite provides an idea of establishing bionic foam-core cushion composites by foam interface, which is expected to be used as energy absorption material for commercial application.

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Axial Impact Performances of Composite Aluminum Foam Tubes

Wang,

Xu,

Zhang

et al. 2024

Adv Eng Mater

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An improved melt foaming method is employed to fabricate composite aluminum foam tubes (CAFTs) with varying diameter ratios, achieving metallurgical bonding between the aluminum foam and aluminum tubes. Based on the structural characteristics of aluminum foam‐filled tubes and traditional numerical formula for calculating the energy absorption properties of metal foams, a new calculation formula is proposed to accurately evaluate energy absorption performance of CAFTs under axial load, enabling more precise numerical calculation of total energy absorption. Furthermore, drop weight impact tests and finite element simulations are conducted to investigate the axial impact performance and deformation mechanism of CAFTs. The influence of diameter ratio on crashworthiness and energy absorption performance is also analyzed. As the diameter ratios decrease, both the impact resistance and total energy absorption of CAFTs increase, while the degree of tube damage gradually decreases. Moreover, finite element simulation results demonstrate that metallurgical combination between aluminum foam and aluminum tubes effectively transfers stress to thin‐walled tubes with better load‐bearing performance, preventing concentrated collapse of aluminum foam core. Additionally, the presence of aluminum foam provides robust restraint against deformation or rupture in thin‐walled tubes.

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Low-velocity impact indentation rate sensitivity of aluminium foams

Cited by 8 publications

References 21 publications

Investigation of the Indentation Resistance of Aluminum Foam Sandwich Panels with Metallurgical Bonding Interfaces under Low-Velocity Impact

Investigation of the Indentation Resistance of Aluminum Foam Sandwich Panels with Metallurgical Bonding Interfaces under Low-Velocity Impact

Bionic micro‐interface lattice foam‐core composites: Manufacturing techniques, compression resistance, bursting strength, low‐velocity impact, and dynamic cushion efficacy

Axial Impact Performances of Composite Aluminum Foam Tubes

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