Compressive behavior and energy absorbing characteristic of open cell aluminum foam filled with silicate rubber

The study deals with an application of aluminum foam as an energy-absorbing material for the carrying structure of a rail car. The material is particularly recommended for circular tube carrying structures. The authors conducted mathematical modeling of dynamic loads on the carrying structure of an open wagon that faces shunting impacts with consideration of the center sill filled with aluminum foam. It was established that the maximum accelerations on the carrying structure of an open wagon were 35.7 m/s2, which was 3.5% lower in comparison with those for a circular tube structure without a filler. The results obtained were proved by computer modeling. The strength of the carrying structure of an open wagon was also calculated. It was established that aluminum foam applied as a filler for the center sill decreased the maximum equivalent stresses in the carrying structure of an open wagon by about 5% and displacements by 12% in comparison with those involving the circular tube carrying structure of an open wagon without a filler. The natural frequencies and the oscillation modes of the carrying structure of an open wagon were defined. The designed models of the dynamic loading of the carrying structure of an open wagon were verified with an F-test.

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The temperature effect on the axial quasi-static compressive behavior of ex-situ aluminum foam-filled tubes

Composite Structures ◽

10.1016/j.compstruct.2017.08.034 ◽

2017 ◽

Vol 180 ◽

pp. 709-722 ◽

Cited By ~ 33

Author(s):

Emanoil Linul ◽

Nima Movahedi ◽

Liviu Marsavina

Keyword(s):

Temperature Effect ◽

Aluminum Foam ◽

Ex Situ ◽

Compressive Behavior ◽

Foam Filled

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Fabrication and characterization of hypoeutectic open-cell Al-Si foams using gravity die casting and squeeze casting

Metallurgical Research & Technology ◽

10.1051/metal/2018085 ◽

2018 ◽

Vol 115 (5) ◽

pp. 509 ◽

Cited By ~ 1

Author(s):

Samsudin Fitri Aida ◽

Mirsad Nur Hijrah ◽

Amirah Ahmad Hamdi ◽

Hussain Zuhailawati ◽

Abu Seman Anasyida

Keyword(s):

Energy Absorption ◽

Aluminum Foam ◽

Squeeze Casting ◽

Die Casting ◽

Compression Tests ◽

Open Cell ◽

Space Holder ◽

Absorption Energy ◽

Energy Absorbing

Gravity die casting and squeeze casting are the techniques used for the fabrication of hypoeutectic open-cell Al-Si foams which are characterized and studied for their energy absorbing quality in compression tests. The effect of different amounts of sodium chloride (NaCl) (up to 56 vol.%) as a space holder in the casting of aluminum foam on the morphology, density, porosity, compressive and energy absorption properties of aluminum foam was studied. The hypoeutectic Al-Si alloy with NaCl particles as a space holder was used to fabricate the aluminum foam using gravity die casting and squeeze casting. The hypoeutectic open-cell Al-Si foams produced by squeeze casting showed smaller pore size, better pore distribution, higher porosity, good compressive strength and greater energy absorption energy compared to that of gravity die casting. The hypoeutectic open-cell Al-Si foams with 44 vol.% NaCl using squeeze casting showed the best properties among all foams due to its moderate and well-distributed porosity.

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Compressive behavior and energy absorption capacity of unconstrained and constrained open-cell aluminum foams

Advanced Composites Letters ◽

10.1177/2633366x20923671 ◽

2020 ◽

Vol 29 ◽

pp. 2633366X2092367

Author(s):

Chengbing Li ◽

Chunxing Li ◽

Yazhou Wang

Keyword(s):

Aluminum Foam ◽

Dynamic Compression ◽

Rate Sensitivity ◽

Absorption Capacity ◽

Compressive Behavior ◽

Aluminum Foams ◽

Energy Absorption Capacity ◽

Open Cell ◽

Hollow Structures ◽

Practical Engineering

In practical engineering applications, while the open-cell aluminum foam as crash absorber is filled to the hollow structures, its deformation occurs under constrained stress boundaries. The experimental work was conducted to examine the effect of radial constraints on the mechanical behavior of the open-cell aluminum foam under quasi-static and dynamic compression. Results show that the radial constraints induce significant strain hardening of the open-cell aluminum foam. The open-cell aluminum foams tested with and without radial constraints show a clear strain rate sensitivity. The densification of the foam occurs earlier (showing lower densification strain) under radial constraints. The radial constraints enhance the energy absorbed per unit volume of the open-cell aluminum foam.

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Pressure Drop Measurements for Air Flow Through Open-Cell Aluminum Foam

Fluids Engineering ◽

10.1115/imece2004-60428 ◽

2004 ◽

Cited By ~ 5

Author(s):

Nihad Dukhan ◽

Angel Alvarez

Keyword(s):

Reynolds Number ◽

Pressure Drop ◽

Flow Rate ◽

Aluminum Foam ◽

Flow Direction ◽

The Other ◽

Turbulent Regime ◽

Thick Sample ◽

Open Cell ◽

Two Samples

Wind-tunnel pressure drop measurements for airflow through two samples of forty-pore-per-inch commercially available open-cell aluminum foam were undertaken. Each sample’s cross-sectional area perpendicular to the flow direction measured 10.16 cm by 24.13 cm. The thickness in the flow direction was 10.16 cm for one sample and 5.08 cm for the other. The flow rate ranged from 0.016 to 0.101 m3/s for the thick sample and from 0.025 to 0.134 m3/s for the other. The data were all in the fully turbulent regime. The pressure drop for both samples increased with increasing flow rate and followed a quadratic behavior. The permeability and the inertia coefficient showed some scatter with average values of 4.6 × 10−8 m2 and 2.9 × 10−8 m2, and 0.086 and 0.066 for the thick and the thin samples, respectively. The friction factor decayed with the Reynolds number and was weakly dependent on the Reynolds number for Reynolds number greater than 35.

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