Low velocity impact behavior of composite sandwich panels

Schubel, Patrick M.; Luo, Jianqiang; Daniel, I. M.

doi:10.1016/j.compositesa.2004.11.014

Cited by 161 publications

(103 citation statements)

References 22 publications

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“…Hence, studies on low velocity impact behavior on aerospace application are very essential. Although much of the research has been done on Rohacell and PVC based foams as core material for sandwich composites [11]- [13], very limited research has been carried out on polyurethane based foam core sandwich composites subject to low velocity impact. One main issue with low velocity impact is the visibility of impacted region (BVID = Barely Visible Impact Damage).…”

Section: Introductionmentioning

confidence: 99%

Effect of Core Thickness and Core Density on Low Velocity Impact Behavior of Sandwich Panels with PU Foam Core

Loganathan¹,

Shivanand²

2015

JMMCE

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Composite sandwich structures are highly proven materials that provide high strength to weight ratio. However research works are still being carried out in the area of impact characteristics of sandwich composites. This paper provides a better understanding on the effect of core density and core thickness of sandwich panels subject to low velocity drop test. Specific energy absorption capacity of sandwich panels is obtained and factors affecting the same are explored with facings made of woven glass fiber laminates and polyurethane foam core with three different densities of 70 Kg/m 3 , 100 Kg/m 3 , 200 Kg/m 3 .

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Section: Introductionmentioning

confidence: 99%

Effect of Core Thickness and Core Density on Low Velocity Impact Behavior of Sandwich Panels with PU Foam Core

Loganathan¹,

Shivanand²

2015

JMMCE

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“…In this latter case, sandwich structures are often susceptible to foreign object damages resulting from impacts [7]. Therefore, the performance of structural sandwich parts under impact loading has to be considered in many cases.…”

Section: Introductionmentioning

confidence: 99%

Cork agglomerates as an ideal core material in lightweight structures

et al. 2010

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The experiments carried out in this investigation were oriented in order to optimize the properties of cork-based agglomerates as an ideal core material for sandwich components of lightweight structures, such as those used in aerospace applications. Static bending tests were performed in order to characterize the mechanical strength of different types of cork agglomerates which were obtained considering distinct production variables. The ability to withstand dynamic loads was also evaluated from a set of impact tests using carbon-cork sandwich specimens. The results got from experimental tests revealed that cork agglomerates performance essentially depends on the cork granule size, its density and the bonding procedure used for the cohesion of granulates, and these parameters can be adjusted in function of the final application intended for the sandwich component. These results also allow inferring that optimized cork agglomerates have some specific properties that confirm their superior ability as a core material of sandwich components when compared with other conventional materials.

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“…As a second case (Sample case #2), consider the experiments by Schubel et al [13]. Sandwich panels with closed-cell PVC foam core (Divinycell H250) and laminated carbon fabric/epoxy faces (AGP370-5H/3501-6S) have been impacted with energies ranging from 7.75 to 108 J.…”

Section: Numerical Results and Discussionmentioning

confidence: 99%

“…The sandwich panels have been fabricated by bonding the face sheets to the foam core with Hysol 9430 adhesive epoxy resin. For all the omitted details, the readers are referred to [13]. A drop tower apparatus with a free falling mass has been used to impacts the plates.…”

Section: Numerical Results and Discussionmentioning

confidence: 99%

Impact analysis of laminated and sandwich composites using a plate finite element with strain energy updating

Icardi

Ferrero

2008

WIT Transactions on the Built Environment

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This paper deals with finite element simulation of low velocity-low energy impacts on sandwich composites with laminated faces. A refined zig-zag model with a high-order piecewise representation of in-plane and transverse displacement components is used as a structural model in order to accurately simulate the effects of the transverse normal stress and strain. The goal is to develop a tool for improving the accuracy of conventional plate models, so as to enable the impact analysis of sandwich composites. A strain energy updating process is used for this purpose. As is customary, the Hertzian law and the Newmark implicit time integration scheme are used. The contact radius is computed within each load step by an iterative algorithm, which forces the impacted top surface to conform, in the least-squares sense, to the shape of the impactor. Then, the failure analysis is performed and the material properties of the failed areas reduced. Nonlinear strains of von Karman type are used because the transverse displacement can be quite large even when the plate deflection is small. Comparison with numerical and experimental results published in literature show the present model to be able to accurately predict the impact force and the damage it induces.

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Low velocity impact behavior of composite sandwich panels

Cited by 161 publications

References 22 publications

Effect of Core Thickness and Core Density on Low Velocity Impact Behavior of Sandwich Panels with PU Foam Core

Effect of Core Thickness and Core Density on Low Velocity Impact Behavior of Sandwich Panels with PU Foam Core

Cork agglomerates as an ideal core material in lightweight structures

Impact analysis of laminated and sandwich composites using a plate finite element with strain energy updating

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