Compression after impact test (CAI) on NOMEX™ honeycomb sandwich panels with thin aluminum skins

Gilioli, Andrea; Sbarufatti, Claudio; Manes, Andrea; Giglio, Marco

doi:10.1016/j.compositesb.2014.07.015

Cited by 78 publications

(24 citation statements)

References 12 publications

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“…They also suggested that the visual inspection methods are very misleading and the planar damage area should be used to evaluate the residual strength decay of sandwich panels, rather than barely visible impact damage (BVID). Recently, Gilioli et al [9] conducted a series of CAI test on sandwich panels having thin (1 mm or 1.5 mm) aluminum skins and a Nomex honeycomb core. The relation between the residual strength of the panel and the possible relevant parameters were statistically investigated.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on the compression-after-impact behavior of foam-core sandwich panels

Wang

Chen

Wang

et al. 2015

Jnl of Sandwich Structures & Materials

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This paper presents the experimental results pertaining to the deformation, failure mode, failure mechanism and residual strength for the compression-after-impact tests of woven polymer-based foam-core sandwich panels. Sandwich panels with impact-type damage, inflicted via low-velocity impact, were tested to failure in compression. The optical strain measurement system ARAMIS was used to obtain the complete nonuniform strain and displacement fields of the damaged face-sheet. Consequently, damage in the face-sheets was characterized by fractography. It has been found that the dominant damage mechanism is kink band in the impacted face-sheets due to fiber plastic micro-buckling. Besides, the effects of impactor diameter, impact energy, facesheet thickness and foam core thickness on the residual strength under in-plane compressive loading were studied. This study will be useful for characterizing and predicting the residual compressive strength and understanding the failure mechanism of woven polymer-based foam-core sandwich panel.

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Section: Introductionmentioning

confidence: 99%

Experimental study on the compression-after-impact behavior of foam-core sandwich panels

Wang

Chen

Wang

et al. 2015

Jnl of Sandwich Structures & Materials

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“…Nomex TM honeycomb sandwich structures are extensively used in the aerospace and automotive industry to reduce the overall weight of vehicles, aircrafts, trains, etc., due to the combined advantages of the Nomex core and sandwich structure [1][2][3][4][5][6][7][8]. Examples of the applications of Nomex honeycomb core sandwich structures in airplane are floors, doors, wing flaps, wing-body fairings, rudders, overhead stowage bins, ceiling or sidewall panels, engine cowls, spoilers, nacelles, radomes, etc.…”

Section: Introductionmentioning

confidence: 99%

The flatwise compressive properties of Nomex honeycomb core with debonding imperfections in the double cell wall

Liu

Peng

Wang

et al. 2015

Composites Part B: Engineering

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“…Lascoup [19] performed double cantilever beam tests to quantify the influence of the presence of the through-the-thickness reinforcement on the skin-core interfacial toughness. Gilioli [20] studied the decrease of the sandwich mechanical performance after an impact through compression after impact tests (CAI). There are also a few studies focusing on the test method.…”

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confidence: 99%

Dynamic mechanical behavior of foam-core composite sandwich structures subjected to low-velocity impact

Zhang

Long

et al. 2016

Arch Appl Mech

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The dynamic response of foam-core composite sandwich plates subjected to low-velocity impact is thoroughly investigated by means of drop-weight impact tests and numerical simulations in this paper. The influences of impact energy, foam-core thickness, and punch-head shape and size on the impact mechanical behavior including the impact force time history, the dynamic displacement time history, the residual plastic deformation, the energy absorption capacity, and the back plate deflection are contrastively studied through the control-variant approaches. Several conclusions drawn are useful and helpful to the related product design. The top faceplates of specimens with large foam-core thickness are demonstrated to be vulnerable to the lowvelocity impact under stepped levels of impact energy, while large foam-core thickness can reduce deformation of the interior plates effectively. Moreover, among the three representative types of punch heads, the sharper hemispherical one is checked to be the most destructive with the lowest impact force peak. Besides, a finite element model was built to investigate the damage of faceplates and foam cores. The numerical method was proved to be accurate and efficient. A series of results were obtained revealing the damage mode of faceplates and cores under different impact energies.

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Compression after impact test (CAI) on NOMEX™ honeycomb sandwich panels with thin aluminum skins

Cited by 78 publications

References 12 publications

Experimental study on the compression-after-impact behavior of foam-core sandwich panels

Experimental study on the compression-after-impact behavior of foam-core sandwich panels

The flatwise compressive properties of Nomex honeycomb core with debonding imperfections in the double cell wall

Dynamic mechanical behavior of foam-core composite sandwich structures subjected to low-velocity impact

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