Deformation and failure of blast-loaded metallic sandwich panels—Experimental investigations

Zhu, Feng; Zhao, Longmao; Lu, Guoxing; Wang, Zhi Hua

doi:10.1016/j.ijimpeng.2007.11.003

Cited by 217 publications

(77 citation statements)

References 27 publications

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“…The mid-span permanent deflection of the back face-sheet of sandwich structures is normally used in assessing the resistance of an object to blast/impact loading. The experimental results showed that the back facesheet mid-span deflection of sandwich specimens increases with the increase of impulse magnitude and decreases with the increase of face-sheet or core thickness (Wang et al, 2011;Zhu et al, 2008;Xie et al, 2013). The experimental and simulation results were compared in terms of the permanent deflection of the central point of the back face-sheets, as shown in Fig.…”

Section: Permanent Deflection Of Back Face-sheet and Core Compressionmentioning

confidence: 99%

“…Considerable research demonstrates that the sandwich beams and plates outperform the corresponding monolithic structures for shock loading. The typical deformation/failure modes, the dynamic response, and the failure mechanism of sandwich beams and panels have been obtained experimentally (Rubino et al, 2008;Wang et al, 2011;Zhu et al, 2008). Corresponding theoretical and numerical predictions have also been completed Qiu et al, 2004;Zhu et al, 2010;Hutchinson et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

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The Response of Clamped Shallow Sandwich Arches with Metallic Foam Cores to Projectile Impact Loading

Fan

Xie

et al. 2015

Lat. Am. j. solids struct.

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The dynamic response and energy absorption capabilities of clamped shallow sandwich arches with aluminum foam core were numerically investigated by impacting the arches at mid-span with metallic foam projectiles. The typical deformation modes, deflection response, and core compression of sandwich arches obtained from the tests were used to validate the computation model. The resistance to impact loading was quantified by the permanent transverse deflection at mid-span of the arches as a function of projectile momentum. The sandwich arches have a higher shock resistance than the monolithic arches of equal mass, and shock resistance could be significantly enhanced by optimizing geometrical configurations. Meanwhile, decreasing the face-sheet thickness and curvature radius could enhance the energy absorption capability of the sandwich arches. Finite element calculations indicated that the ratio of loading time to structural response time ranged from 0.1 to 0.4. The projectile momentum, which was solely used to quantify the structural response of sandwich arches, was insufficient. These findings could provide guidance in conducting further theoretical studies and producing the optimal design of metallic sandwich structures subjected to impact loading. Keywords INTRODUCTIONThe superior performance of sandwich structures relative to monolithic solid structures is well established for the broad range of application requiring high quasi-static strength and stiffness (Lu and Yu, 2003;Ashby et al., 2000;Zhu et al., 2010). However, the resistance of sandwich structures to impact loading must be fully investigated to quantify the advantage of sandwich designs over the monolithic design for potential application in shock resistant structures. Considerable research demonstrates that the sandwich beams and plates outperform the corresponding monolithic structures for shock loading. The typical deformation/failure modes, the dynamic response, and the failure mechanism of sandwich beams and panels have been obtained experimentally (Rubino et al., 2008;Wang et al., 2011;Zhu et al., 2008). Corresponding theoretical and numerical predictions have also been completed Qiu et al., 2004;Zhu et al., 2010;Hutchinson et al., 2005). The superior performance of sandwich structures ¬is caused by a segment of the fluid-structure interaction (Liang et al., 2007) and by the greater bending strength of sandwich configures when compared with their monolithic counterpart. All these works, however, are restricted to the flat sandwich structures, although substantive curved structures are applied in practical engineering.Corona E and Wang JW (2008) experimented on arches constructed by bonding a layer of foam to a single metal sheet under a point load at mid-span. Results showed that the critical buckling loads of such arches could be significantly increased with the presence of the foam layer. Karam and Gibson (2008) and Obrecht et al. (1995) also indicated that shells supported or coated with lightweight materials display less imperfec...

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Section: Permanent Deflection Of Back Face-sheet and Core Compressionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Response of Clamped Shallow Sandwich Arches with Metallic Foam Cores to Projectile Impact Loading

Fan

Xie

et al. 2015

Lat. Am. j. solids struct.

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“…Competitors such as corrugated structures [8][9][10][11] were also proposed having controllable macro structures in complex shapes by providing energy absorption comparable with foam-like behavior. Metallic honeycombs are also used as core material in sandwich panels [12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Dynamic crushing and energy absorption of sandwich structures with combined geometry shell cores

Taşdemirci

Kara

Turan

et al. 2015

Thin-Walled Structures

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a b s t r a c tDynamic crushing and energy absorption characteristics of sandwich structures with combined geometry shell cores were investigated experimentally and numerically. The effect of strain rate on the crushing behavior was presented by the crushing tests at quasi-static, intermediate and high strain rate regimes. It was shown that absorbed energy increased with increasing impact velocity. The effect of confinement on crushing behavior was shown by conducting confined experiments at quasi-static and dynamic rates. Higher buckling loads at lower deformation were observed in confined quasi-static crushing due to additional lateral support and friction provided by confinement wall. By using fictitious numerical models with strain rate insensitive material models, the effect of inertia and strain rate on crushing were shown. It was observed that, increase in impact velocity caused increase in inertial effects and strain rate effects were nearly independent from the impact velocity. The effects of multilayering were also investigated numerically.

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“…However, recent investigations on the behaviors of sandwich composites under blast loading mainly focus on the transverse behavior without longitudinal compressive loading [2][3][4][5][6][7][8]. Nurick [2], Zhu [3], and Dharmasena et al [4] have tested sandwich structures with a metallic honeycomb core.…”

Section: Introductionmentioning

confidence: 99%

“…Nurick [2], Zhu [3], and Dharmasena et al [4] have tested sandwich structures with a metallic honeycomb core. Radford et al [5] conducted blast experiments on sandwich composites with a metal foam core.…”

Section: Introductionmentioning

confidence: 99%

Blast Performance of Sandwich Composites with In-Plane Compressive Loading

Wang

Shukla

2011

Exp Mech

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An experimental investigation was conducted to evaluate the dynamic performance of E-glass Vinyl Ester composite face sheet / foam core sandwich panels when subjected to pre-compression and subsequent blast loading. The sandwich panels were subjected to 0 kN, 15 kN and 25 kN of in plane compression respectively, prior to transverse blast wave loading with peak incident pressure of 1 MPa and velocity of 3 Mach. The blast loading was generated using a shock tube facility. During the experiments, a high-speed photographic system utilizing three digital cameras was used to acquire the real-time 3-D deformation of the sandwich panels. The 3D Digital Image Correlation (DIC) technique was used to quantify the back face out-of-plane deflection and in-plane strain. The results showed that in-plane compressive loading facilitated buckling and failure in the front face sheet. This mechanism greatly reduced the blast resistance of sandwich composites.

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Deformation and failure of blast-loaded metallic sandwich panels—Experimental investigations

Cited by 217 publications

References 27 publications

The Response of Clamped Shallow Sandwich Arches with Metallic Foam Cores to Projectile Impact Loading

The Response of Clamped Shallow Sandwich Arches with Metallic Foam Cores to Projectile Impact Loading

Dynamic crushing and energy absorption of sandwich structures with combined geometry shell cores

Blast Performance of Sandwich Composites with In-Plane Compressive Loading

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