Response of flexible sandwich-type panels to blast loading

“…The stress-strain properties under uniaxial compression of the four materials are presented in Figure 3. The stressstrain curves for the aluminium foam, EPS and Nomex ® were sourced from literature [1,6,9], while the Skydex ® curve was taken from information provided by the company [10] for the single layer convoy decking. Sandwich panels were made for each material with a 500 mm × 500 mm × 1.7 mm steel panel as the front face, a 500 mm × 500 mm energy absorbing layer, and a 600 mm × 600 mm × 1.7 mm steel panel as the back face.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…Karagiozova et al [1] investigated the properties of aluminium honeycomb and polystyrene sandwich panels subjected to near-field blast loading using both experimental testing and numerical modelling. They showed that as the loading increases, the densification of the foam can result in high force transmissions to the back faces of sandwich panels.…”

Section: Figurementioning

confidence: 99%

Evaluation of energy absorbing materials under blast loading

Bornstein

Ackland

2013

WIT Transactions on Engineering Sciences

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Traditional blast protection systems present a hard metallic surface, which acts to deflect and attenuate the blast loading. However, more recently, lightweight energy absorbing materials, including cellular materials, are being considered. These materials reduce the transmitted force by deforming elastically or plastically under the blast load. In this study, four commercially available energy absorbing materials were considered for application in blast protection. The materials considered were aluminium foam, Nomex ® honeycomb, Skydex ® and expanded polystyrene. The impulse transmitted by the rear face of experimental test panels under blast loading was assessed by positioning a mass on the rear face of each of the four panels, the velocity of which was measured using high speed imaging. Measurements of the permanent deformation of the rear face of the panels were also taken. The aluminium foam recorded both the lowest permanent deformation and impulse transfer to the mass of the materials tested, making it the most suitable material of those tested for use as an appliqué panel in this particular scenario. Analysis of the panels suggested that for the particular experimental setup used, minimal energy was absorbed by plastic deformation or crushing of the energy absorbing materials. Instead, the permanent deformation of the panels may be related to the mechanical properties of the materials in the plane perpendicular to the blast load.

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“…These panels possess excellent properties such as lightweight, high specific stiffness, moisture independency, and corrosion resistance. In the past, several researchers studied blast response of the sandwich foam panels and presented the effectiveness of these panels under blast loading (Guruprasad and Mukherjee, 2000aand 2000b, Hanssen et al, 2002aand 2002b, Qiu et al, 2003, Xue and Hutchinson, 2003, Radford et al, 2006, Sriram et al, 2006, Nemat-Nasser et al, 2007, Bahei-El-Din and Dvorak, 2008, Tekalur et al, 2008, Karagiozova et al, 2009, Zhu et al, 2009, and Langdon et al, 2010. Recently, with the advancement in technology, metal foam has emerged as an important material in blast resistance applications due to their high energy absorption potential (Ashby et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

“…Most of the past research work has been carried out on the sandwich foam panels with different varieties of core ranging from fiber reinforced polymer (FRP), natural material (air, sand/soils), polymeric foams, honeycombs and commercially available metal foams (Hanssen et al, 2002aand 2002b, Qiu et al, 2003, Xue and Hutchinson, 2003, Radford et al, 2006, Sriram et al, 2006, NematNasser et al, 2007, Bahei-El-Din and Dvorak, 2008, Tekalur et al, 2008, Karagiozova et al, 2009, Zhu et al, 2009, Langdon et al, 2010, Jing et al, 2013, Chang et al, 2013, and Liu et al, 2013. No studies, however, have been reported on the stiffened sandwich foam panels and their blast response, except author's recent work on the response of stiffened polymer foam sandwich structures under impulsive loading (Goel et al, 2013a).…”

Section: Introductionmentioning

confidence: 99%

Blast resistance of stiffened sandwich panels with closed-cell aluminum foam

Goel

Matsagar

Gupta

2014

Lat. Am. j. solids struct.

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In the present investigation, response of the stiffened sandwich foam panels with closed-cell aluminum foam cores subjected to blast load is examined. The panels have the metal foam sandwiched between two steel sheets. To improve resistance of the sandwich foam panel against blast, stiffeners are provided and their dynamic response under varying blast load is studied. Blast load is applied using blast equations available in LS-DYNA which takes into account reflection of blast from surface of the sandwich foam panel. Finite element based numerical simulations for dynamic analysis are performed employing a combination of shell and solid elements for steel sheets and metal foam, respectively. Quantitative assessment of dynamic response of the sandwich foam panels is made, primarily focusing on peak central point displacement of back-sheet (opposite to explosion) of the panel. Several analyses are carried out with an objective to understand the effects of stiffener configuration, foam thickness, foam density, and standoff distance on the blast response. Results indicate that the provision of stiffeners along with metal foam considerably increases blast resistance as compared to the unstiffened panels with the metal foam.

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Response of flexible sandwich-type panels to blast loading

Cited by 70 publications

References 12 publications

A two-phase model to simulate the 1-D shock wave propagation in porous metal foam

A two-phase model to simulate the 1-D shock wave propagation in porous metal foam

Evaluation of energy absorbing materials under blast loading

Blast resistance of stiffened sandwich panels with closed-cell aluminum foam

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