On the structural parameters of honeycomb-core sandwich panels against low-velocity impact

Sun, Guangyong; Huo, Xintao; Wang, Hongxu; Hazell, Paul J.; Li, Qing

doi:10.1016/j.compositesb.2021.108881

Cited by 115 publications

(29 citation statements)

References 49 publications

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“…It is thought that the resistance of top and bottom face sheets and face-sheet/core interface to local bending in the impact region with global bending and crushing, and the bending stiffness of top and bottom laminated BFR face-sheets are strongly important. [37,56,57] The variation in the stiffness slope in the second region may be caused by debonding, delamination, and fiber damage in the layers of the top face-sheets; while it may also result from local delamination occurring at the interface of top face/core. The core walls and interface of top face-sheet/aluminum core can be subjected to shear stresses because of local bending in the impact zone.…”

Section: Resultsmentioning

confidence: 99%

“…It is thought that the second and third stages of the force-displacement curves are affected by face-sheet bending stiffness. Therefore, it may be commented that the face-sheet thicknesses [57] and nanoparticle additives [42,43] that can affect the bending stiffness of the face-sheets are significant. In addition, it can be said that an adhesive with increased toughness or interfacial strength makes a great contribution.…”

Section: Resultsmentioning

confidence: 99%

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Investigation of low‐velocity impact behavior of aluminum honeycomb composite sandwiches with GNPs doped BFR laminated face‐sheets and interfacial adhesive for aircraft structures

Demirci

2022

Polymer Composites

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The low-velocity impacts that represent the equipment drop during maintenance and production, crash and drops of luggage that may occur during transportation and bird strikes during takeoff may occur in aircraft parts where honeycomb composite structures are used. Therefore, the low-velocity impact (LVI) resistance of aircraft components is crucial. In this study, the effect of graphene nano platelets (GNPs) on the LVI behaviors of the BFR (basalt fiber reinforcement) laminated face-sheets and the interface adhesive between the face-sheet and the aluminum honeycomb core for composite sandwich structures were investigated. LVI tests were applied to GNPs doped and un-doped BFR/aluminum composite sandwich samples to determine the values of the impact forces, displacements, interaction times, and absorbed energy at two different energy levels of 10 J and 20 J. The surface damages in the impact zones of the GNPs doped and un-doped BFR laminated top face-sheets of the sandwich samples were investigated on a macro scale with liquid penetrant. The damage formation and development of GNPs were detected in the crosssectional micro-images of the top face-sheets. SEM analysis was accomplished to define the fracture mechanisms provided by GNPs. As a consequence of tests and damage analysis, it was reported that GNPs increase the impact resistance of BFR/aluminum honeycomb composite sandwiches and limit and reduce damage development. GNPs showed increases in force and rebound energies of approximately 16.1% and 21.1% for 10 J, and approximately 8.2% and 14.7% for 20 J, respectively.aluminum honeycomb, basalt fiber reinforcement (BFR), composite sandwich, graphene Nano platelets (GNPs), low-velocity impact (LVI) | INTRODUCTIONThe usage of fiber-reinforced composites are rapidly increasing and widely spreading in industry since their advantages such as high strength, impact and abrasion resistance, rigidity, good corrosion resistance, electrical and thermal insulation. [1][2][3][4] Composites are widely used in many industrial fields related to aerospace, marine,

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Investigation of low‐velocity impact behavior of aluminum honeycomb composite sandwiches with GNPs doped BFR laminated face‐sheets and interfacial adhesive for aircraft structures

Demirci

2022

Polymer Composites

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“…In conclude, the small hole structure has a negative effect on the overall performance characteristics. According to the literature, the perforation resistance of the front surface in sandwich structures is higher when the core structure is soft, and a soft core structure can be obtained with large cell size and/or thin cell wall [30]. Furthermore, Zuhri et al (2014) investigated the energy absorption properties of sandwich composite structures with square and triangular honeycomb core structures, and it was discovered that the square shaped honeycomb structure, which has a larger cell unit, absorbs more energy [31].…”

Section: Drop-weight Impact Resistance Test Resultsmentioning

confidence: 99%

An investigation of the effect of structural parameters on the impact properties of sandwich-structured shock absorbers

Yalcin-Enis¹,

Sezgin²

2022

JSEAM

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The purpose of this study is to develop an impact absorber with a core made of sustainable textile waste as an alternative to the conventional honeycomb structure. In this case, the core structure is made of cotton fiber webs recycled from denim waste, and the outer shell is made of polypropylene plates reinforced with carbon, jute, and E-glass woven fabrics. Production of the sandwich structure is carried out using the hot press method. In addition to the fabric types and layer sequences utilized in the outer shell, the geometry of the core structure is altered, and their effect on the drop-weight impact resistance is examined. The prominent results emphasize that the use of high-performance fabrics in the outer shell facing the outer surface increases the impact resistance, and the sizes of the holes to be obtained in the core structure should be optimized in order to be effective in energy absorption. The results reveal that these developed sandwich structures can constitute a promising alternative for the automotive industry.

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“…Different core configurations will demonstrate diversity of mechanical properties. The common core type includes lattice, [6][7][8] corrugate, [9] honeycomb, [10,11] re-entrant core, [12][13][14] X-core [15,16] and so on.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the dynamic behavior of composite gradient double‐arrow auxetic structure under local impact load

Zeng

et al. 2022

Polymer Composites

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Based on the design concept of functionally graded materials, the composite gradient double-arrow auxetic structures were designed and fabricated. The thickness of core layers demonstrates an increasing trend for positive gradient structure, while a decreasing trend for negative gradient structure. The thickness of core layers keeps constant for homogeneous structure. The dynamic response and failure modes of the double-arrow auxetic structure with different gradient distributions of wall thickness were obtained by foam projectile impact experiments. The influence of the gradient distribution of core wall thickness on the impact resistance of composite double-arrow auxetic structures under local impact load was investigated. The results demonstrated that the gradient distribution of core wall thickness has an important influence on the dynamic response and failure modes of the structure. The negative gradient auxetic structure revealed more excellent impact resistance compared with the positive gradient auxetic structure. In addition, the response of the gradient double-arrow auxetic structure under local impact load was simulated by ABAQUS/Explicit, and the simulation results were in good agreement with the experimental results. Combined with the experimental and numerical simulation results, it was found that the negative gradient distribution of core wall thickness had an obvious improvement on the impact resistance of composite double-arrow auxetic structure under local impact load.

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On the structural parameters of honeycomb-core sandwich panels against low-velocity impact

Cited by 115 publications

References 49 publications

Investigation of low‐velocity impact behavior of aluminum honeycomb composite sandwiches with GNPs doped BFR laminated face‐sheets and interfacial adhesive for aircraft structures

Investigation of low‐velocity impact behavior of aluminum honeycomb composite sandwiches with GNPs doped BFR laminated face‐sheets and interfacial adhesive for aircraft structures

An investigation of the effect of structural parameters on the impact properties of sandwich-structured shock absorbers

Investigation on the dynamic behavior of composite gradient double‐arrow auxetic structure under local impact load

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