Response of aluminum corrugated sandwich panels under foam projectile impact – Experiment and numerical simulation

Li, Xin; Li, Shiqiang; Wang, Zhi Hua; Yang, Jinglei; Wu, Guiying

doi:10.1177/1099636216630503

Cited by 20 publications

(7 citation statements)

References 33 publications

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“…Corrugated panels have other remarkable characteristics, such as a high ratio of strength to density, good energy absorption and easy fabrication. Hence many papers have been published in the literature investigating the mechanical behavior of corrugated sheets for general applications, such as the effect of different shapes of the corrugation on the bending stiffness of the panel (Luo et al 1992), their geometric and material nonlinearities with different loading configurations through finite element analysis (Gilchrist et al 1999), the equivalent properties of the panels by homogenized-based analytical models (Bartolozzi et al 2014) and the dynamic response of corrugated sandwich panels in free vibration analysis (Peng et al 2014) or under air blast loadings (Li et al 2014;Zhang et al 2014).…”

Section: Corrugation and Anisotropic Behaviormentioning

confidence: 99%

Multi-objective optimization for the geometry of trapezoidal corrugated morphing skins

Dayyani

Friswell

2016

Struct Multidisc Optim

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Morphing concepts have great importance for the design of future aircraft as they provide the opportunity for the aircraft to adapt their shape in flight so as to always match the optimal configuration. This enables the aircraft to have a better performance, such as reducing fuel consumption, toxic emissions and noise pollution or increasing the maneuverability of the aircraft. However the requirements of morphing aircraft are conflicting from the structural perspective. For instance the design of a morphing skin is a key issue since it must be stiff to withstand the aerodynamic loads, but flexible to enable the large shape changes. Corrugated sheets have remarkable anisotropic characteristics. As a candidate skin for a morphing wing, they are stiff to withstand the aerodynamic loads and flexible to enable the morphing deformations. This work presents novel insights into the multi-objective optimization of a trapezoidal corrugated core with elastomer coating. The geometric parameters of the coated composite corrugated panels are optimized to minimize the in-plane stiffness and the weight of the skin and to maximize the flexural out-of-plane stiffness of the skin. These objective functions were calculated by use of an equivalent finite element code. The gradientbased aggregate method is selected to solve the optimization problem and is validated by comparing to the GA multiobjective optimization technique. The trend of the optimized objectives and parameters are discussed in detail; for example the optimum corrugation often has the maximum corrugation height. The obtained results provide important insights into the design of morphing corrugated skins.

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Section: Corrugation and Anisotropic Behaviormentioning

confidence: 99%

Multi-objective optimization for the geometry of trapezoidal corrugated morphing skins

Dayyani

Friswell

2016

Struct Multidisc Optim

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“…due to their higher specific stiffness, strength, energy absorption capability under blast/impact loading [1–3]. In the past few decades, various types of topological configurations of metallic and composite sandwich cores such as closed cell foam, honeycomb, corrugated, and recently 3D lattice truss cores have been developed [4–8]. It has been proven that corrugated and 3D periodic lattice core sandwich structures (pyramidal, tetrahedral, Kagome, prismatic configurations, etc.)…”

Section: Introductionmentioning

confidence: 99%

Dynamic responses of hybrid lightweight composite sandwich panels with aluminium pyramidal truss cores

Jiang

Chen

et al. 2020

Jnl of Sandwich Structures & Materials

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This paper experimentally and numerically investigates the free vibration, quasi-static compressive and split Hopkinson pressure bar impact responses of hybrid composite pyramidal truss sandwich panels. Such sandwich panels made of carbon fibre composite face sheets and aluminium alloy pyramidal truss cores are fabricated using an interlocking and adhesive bonding approach. Modal tests and quasi-static compression tests are conducted. A good consistency for natural frequencies, modal shapes and static stress–strain curves of the specimen with the same specification is obtained, which ensures the good repeatability of the present specimens. Considering the effect of strain rate, a series of split Hopkinson pressure bar tests combined with numerical simulations is carried out to investigate their dynamic compression responses. A good agreement between simulation results and experimental data is observed, which shows that the adopted split Hopkinson pressure bar testing device and the modified Johnson-Cook model are reasonable and reliable. Results show that the dynamic compression modulus and strength of specimen are strongly influenced by the relative density of the truss cores and much higher than the corresponding static compression modulus and strength. Furthermore, it is also revealed that all the specimens have excellent energy absorption performance, which may have greatly advantage in shock isolation application.

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“…4,5 The light core structure provides a high energy damping capacity, while the surface plates provide great shear strength and bending resistance. 6 Sandwich panels with a corrugated core are widely used because of their low cost, ease of production, low density and advanced mechanical properties. 7,8 Metallic corrugated cores provide effective impact resistance and a high energy-absorbing capacity.…”

Section: Introductionmentioning

confidence: 99%

The effect of core configuration on the compressive performance of metallic sandwich panels

Zurnaci¹,

Gökkaya²

2019

Mater. Tehnol.

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The compressive performance of metallic sandwich panels signifies a key mechanical behaviour under compression loading. This paper describes the compressive performance of metallic corrugated core sandwich panels having different core configurations under quasi-static compression loads. Two different sandwich panel core configurations were studied: the corrugated monolithic core and the corrugated sliced core. The corrugated cores were fabricated using a sheet-metal bending technique with trapezoidal geometry and then bonded to surface plates. Aluminium 1050 H14 sheets were used as the core and surface materials. Sandwich panel samples were prepared and tested experimentally under a quasi-static compression load (compression rate of 2 mm/min). The force-displacement curves of the sandwich panels with different core configurations were obtained from the experimental tests. The compressive performance parameters included the maximum compression load, the average compression load, the energy absorption and the specific energy absorption. It was found that the core configuration played a key role in the compressive performance. Finally, when the compressive performance of these two different core configurations was compared, the corrugated sliced-core configurations exhibited better performance.

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Response of aluminum corrugated sandwich panels under foam projectile impact – Experiment and numerical simulation

Cited by 20 publications

References 33 publications

Multi-objective optimization for the geometry of trapezoidal corrugated morphing skins

Multi-objective optimization for the geometry of trapezoidal corrugated morphing skins

Dynamic responses of hybrid lightweight composite sandwich panels with aluminium pyramidal truss cores

The effect of core configuration on the compressive performance of metallic sandwich panels

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