Free vibration analysis of a laminated honeycomb sandwich panel: a suggested analytical solution and a numerical validation

Al-Khazraji, Mustafa S.; Jweeg, Muhsin J.; Bakhy, Sadeq H.

doi:10.1108/jedt-10-2021-0536

Cited by 10 publications

(7 citation statements)

References 45 publications

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“…Te author makes an assumption that the honeycomb deformations' linear elastic response and the consequent core characteristics are solely dependent on the bending of the core cell walls. Te stretching and shearing of cell walls were studied as additional deformation modes [26][27][28]. FEM has been used in numerous previous publications for estimating efective material characteristics regarding honeycomb architectures.…”

Section: Honeycomb Structuresmentioning

confidence: 99%

An Optimum Design of a Subsonic Aircraft Wing due to the Aerodynamic Loading

Ismeal,

Bakirci,

Jweeg

2024

The Scientific World Journal

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Aircraft designers are mainly interested in finding the level of pressure, stresses, and deformations of the parts of the aircraft wing. In many aviation accidents, the failure of the wing is the main cause of disasters, as it is considered the main surface that generates the necessary lift for the aircraft in addition to its other functions in controlling the transverse stability. In this work, a numerical study was performed to obtain the optimum wing structural design parameters for high strength and minimum weight for the L-39 A/C wing. The wing was modeled as a honeycomb with different thicknesses using the software SOLIDWORKS 2020. The pressure distribution was predicted using the FLUENT 2022 R1 package. Having obtained the aerodynamic pressure, the deformations and stresses were obtained using the ANSYS program. The results were compared with other researchers using other models, such as using ribs and stringers in the interior structure of the wing. The current results were found to be reliable and acceptable from the design point of view of the high stiffness-to-weight ratio.

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Section: Honeycomb Structuresmentioning

confidence: 99%

An Optimum Design of a Subsonic Aircraft Wing due to the Aerodynamic Loading

Ismeal,

Bakirci,

Jweeg

2024

The Scientific World Journal

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“…These structures were used in various applications, such as aerospace and protection fields (Lv et al , 2021). Basically, sandwich structures consist of an upper and lower skin with a core, as shown in Figure 1 (Al-Khazraji et al , 2022). The core layer can take various configurations and be made from different materials, depending on the application.…”

Section: Introductionmentioning

confidence: 99%

Review on impact, crushing response and applications of re-entrant core sandwich structures

Al-Khazraji

2024

AEAT

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Purpose Auxetic sandwich structures are gaining attention because of the negative Poisson’s ratio effect offered by these structures. Re-entrant core was one configuration of the auxetic structures. There is a growing concern about the design and behavior of re-entrant cores in aerospace, marine and protection applications. Several researchers proposed various designs of re-entrant core sandwiches with various materials. The purpose of this study is to review the most recent advances in re-entrant core sandwich structures. This review serves as a guide for researchers conducting further research in this wide field of study. Design/methodology/approach The re-entrant core sandwich structures were reviewed in terms of their design improvements, impact and quasi-static crushing responses. Several design improvements were reviewed including 2D cell, 3D cell, gradient, hierarchical and hybrid configurations. Some common applications of the re-entrant core sandwiches were given at the end of this paper with suggestions for future developments in this field. Findings Generally, the re-entrant configuration showed improved energy absorption and impact response among auxetic structures. The main manufacturing method for re-entrant core manufacturing was additive manufacturing. The negative Poisson’s ratio effect of the re-entrant core provided a wide area of research. Originality/value Generally, re-entrant cores were mentioned in the review articles as part of other auxetic structures. However, in this review, the focus was solely made on the re-entrant core sandwiches with their mechanics.

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“…The vibration response of sandwich structures was studied in the literature to find the natural frequencies of vibration and their mode shapes [7][8][9]. Sandwich vibrations were studied analytically by deriving a set of equations of motion based on plate theory and solving it to yield the natural frequencies of vibration [10,11].…”

Section: Introductionmentioning

confidence: 99%