Experimental Investigations on Bending Collapse Modes of Innovative Sandwich Panels with Metallic Foam Core

Formisano, Antonio; Viscusi, Antonio; Durante, Massimo; Carrino, L.; Fazio, Dario De; Langella, A.

doi:10.1016/j.promfg.2020.04.228

Cited by 10 publications

(5 citation statements)

References 15 publications

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“…Note that regarding the foaming process of precursors by optical heating, Hangai et al [21] demonstrated the effectiveness of using the steel mesh as die for the manufacture of complex shaped aluminum foam parts, but they did not consider it as reinforcement for foam core sandwich panels. Moreover, quasi-static mechanical tests were performed to determine the adhesion properties of the core/skin coupling and to compare the bending behavior of sandwiches manufactured by innovative and traditional mold [22].…”

Section: /1mentioning

confidence: 99%

Corrugated Structure Reinforcing Aluminum Foam

Durante¹,

Boccarusso²,

Formisano³

et al. 2021

Esaform 2021

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Metal foams have a number of established niche market and potential applications under investigation due to their peculiarities including thermal, acoustic and mechanical properties at low weight. In order to produce structures resistant at high temperature and acting as barrier to the fire, metals with closed cells are often required, and one of the most consolidate manufacturing process for their production is the gas releasing particles decomposition in semisolids, by means of which a foam is created by a foaming agent dispersed into a precursor. In previous researches, the authors have investigated the possibility of foaming the aluminum starting by a precursor, placed between two skins consisting of steel grids, in order to obtain a sandwich structure at the same time of the foaming step. In line to continue on this topic and to improve the compression strength of the aluminum-foamed core, in this work the steel grid was used both as skins and as a corrugated skeleton inside the core. Different types of sandwich structures were manufactured, following some experimental tests executed to determine the optimal value of temperature and time to foam the precursor. Then, compression tests were carried out, in order to investigate the effectiveness of the proposed solution on the improvement of this mechanical behavior. The mechanical tests highlighted the increase of mechanical properties using this type of corrugated core.

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Section: /1mentioning

confidence: 99%

Corrugated Structure Reinforcing Aluminum Foam

Durante¹,

Boccarusso²,

Formisano³

et al. 2021

Esaform 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…To the authors' best of knowledge, very few works have been carried out on reinforced aluminum foam samples with the skins constituting the sandwich made of lightweight metallic grid. This solution was proved to be capable of providing lightness and relatively higher thermomechanical properties [10]. For instance, Viscusi et al [11] studied the bending behavior and the failure mechanisms of grid-reinforced aluminum foam cylinders through an experimental/numerical approach; Formisano et al [12] investigated the collapse modes of innovative sandwich panels with aluminum foam as the core and stainless-steel wire mesh grid as the skins under three-point bending.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Behavior of Innovative Reinforced Aluminum Foam Panels

Durante

Boccarusso

Carrino

et al. 2022

KEM

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Metals foams are attracting great interest in aerospace, automotive and military fields. Particularly, the closed-cells aluminum foams are characterized by peculiar properties, such as low specific weight coupled with high energy absorption capacity, high specific stiffness and strength and reduced thermal and electrical conductivity. For the above reasons, aluminum foams can be effectively used as core of sandwich structures, replacing the traditional honeycomb and polymer-based foams. However, under specific loading conditions, the foam core was proved to collapse because of the bubble-cell structure, so affecting the mechanical performance of the sandwich constructions. Different solutions have been studying in literature to reinforce the foam-based core; for example, the authors in previous studies investigated the possibility to use a metal grid inside the core as a corrugated skeleton, to improve its behavior under compression. Therefore, based on these premises, the aim of this work is to improve understanding of the mechanical behavior of innovative reinforced aluminum foam panels through an experimental approach consisting of three-point bending tests. In particular sandwich structures with and without a corrugated grid structure, acting as skeleton inside the core, were manufactured. The bending properties were estimated also considering two different types of steel grid employed for the corrugated structure and for reinforcing the skins.

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“…Note that regarding the foaming process of precursors by optical heating, Hangai et al [22] demonstrated the effectiveness of using the steel mesh as die for the manufacturing of complex shaped aluminum foam parts, but they did not consider it as reinforcement for foam core sandwich panels. Moreover, quasi-static mechanical tests were performed to determine the adhesion properties of the core/skin coupling and compare the bending behavior of sandwiches manufactured by innovative and traditional molds [23].…”

Section: Introductionmentioning

confidence: 99%

An Experimental–Numerical Analysis of Innovative Aluminum Foam-Based Sandwich Constructions Under Compression Loads

Viscusi¹,

Durante²,

Formisano³

2021

Lecture Notes in Mechanical Engineering

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Recent studies have highlighted the effectiveness of using closed-cells aluminum foams as core of sandwich constructions, making them attractive for industrial applications. In previous studies, the authors proved the possibility of developing innovative sandwiches by using aluminum foams as core and stainless-steel grid as reinforcing skin, through a one-single foaming step and without using any molds. In line with this topic, the present work investigates the possibility of improving the compression strength of these constructions by integrating the same grid, used as skin, inside the core as corrugated skeleton. For this purpose, sandwiches with different geometries were manufactured and characterized mechanically. An original numerical FEM model was developed in support of the experimental campaign to thoroughly investigate the foam/grid interaction, as well as the failure mechanisms, in order to study the effects of the skeleton shape on the compression behavior of the sandwiches.

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Experimental Investigations on Bending Collapse Modes of Innovative Sandwich Panels with Metallic Foam Core

Cited by 10 publications

References 15 publications

Corrugated Structure Reinforcing Aluminum Foam

Corrugated Structure Reinforcing Aluminum Foam

Mechanical Behavior of Innovative Reinforced Aluminum Foam Panels

An Experimental–Numerical Analysis of Innovative Aluminum Foam-Based Sandwich Constructions Under Compression Loads

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