Effective Thermal and Mechanical Properties of Honeycomb Core Panels for Hot Structure Applications

Fatemi, Javad; Lemmen, Martin

doi:10.2514/6.2006-8121

Cited by 5 publications

(4 citation statements)

References 4 publications

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“…The dimensional notations of the hexagonal core are shown in figure 3. The effective parameters of mechanics can be extracted [17]. The equivalent elastic moduli and Poisson's ratios of the core can be expressed as…”

Section: Effective Parameters Of Sandwich Platesmentioning

confidence: 99%

Low-frequency vibration isolation in sandwich plates by piezoelectric shunting arrays

Chen

Wang

Song

2016

Smart Mater. Struct.

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Piezoelectric shunting arrays are proposed to isolate low-frequency vibrations transmitted in sandwich plates. The performance is characterized through application of finite element method. The numerical result shows that a complete band gap, whose width is about 20 Hz, is produced in the desired low-frequency ranges. The band gap is induced by local resonances of the shunting circuits, whose location is strongly related to the inductance, while the resistance can broaden the band gap to some extent. Vibration experiments are conducted on a 1200×1000×15 mm aluminum honeycomb plate with two arrays of 5×5 shunted piezoelectric patches bonded on the surface panels. Significant attenuation is found in the experimental results, which agree well with the theoretical predictions. Consequently, the proposed idea is feasible and effective.

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Section: Effective Parameters Of Sandwich Platesmentioning

confidence: 99%

Low-frequency vibration isolation in sandwich plates by piezoelectric shunting arrays

Chen

Wang

Song

2016

Smart Mater. Struct.

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“…[7] theoretically and numerically found a new analytical model of heat transfer performance of sandwich metallic honeycomb structures under the forced convection conditions and compared the results. Fatemi and Lemmen [8] addressed the calculation of the effective thermal properties of a honeycomb sandwich panel and mentioned an alternative method based on the familiar Swann-Pittman method. However, the model was only established upon theoretical analysis and numerical simulation.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical study for effective thermal conductivity of metallic honeycomb sandwich structures

Yuan

2020

Jnl of Sandwich Structures & Materials

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Effective thermal conductivity is an essential parameter to investigate thermal properties of metallic honeycomb sandwich structures. And it cannot be measured by traditional methods due to sandwich structure imbedded with air. A practical experimental equipment was designed to evaluate the value under different temperature from 100°C to 400°C. And it was found that the value of effective thermal conductivity can also be calculated by knowing the thermal conductivity of the reference, thickness of the reference and the slope and intercept of temperature in different layers. Meanwhile, numerical simulation was conducted and the results agreed well with that achieved by experiment. Also, the value of effective thermal conductivity calculated by experiment is close to the value calculated by Swann-Pittman empirical equation. And the method is not limited in metallic honeycomb sandwich structure while it can be applied in most structures with amounts of air. On that basis, heat transfer process of the structure is discussed including heat conduction, heat convection and heat radiation.

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“…Honeycomb sandwich composites have proven their usefulness as lightweight construction materials due to their high strength-to-weight ratio, effective acoustic damping and high energy-absorption capability [1]. The 3D-core sandwich composite structures (3DCSCS) is one of these sandwich structures, which consist of two thin glass fiber reinforced composite (GFRC) face-sheet (skin) bonded to a relatively thick and lightweight composite hexagonal honeycomb core [2].…”

Section: Introductionmentioning

confidence: 99%

Online detection of barely visible low-speed impact damage in 3D-core sandwich composite structure

Sikdar

Kudela

Radzieński

et al. 2018

Composite Structures

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Effective Thermal and Mechanical Properties of Honeycomb Core Panels for Hot Structure Applications

Cited by 5 publications

References 4 publications

Low-frequency vibration isolation in sandwich plates by piezoelectric shunting arrays

Low-frequency vibration isolation in sandwich plates by piezoelectric shunting arrays

Experimental and numerical study for effective thermal conductivity of metallic honeycomb sandwich structures

Online detection of barely visible low-speed impact damage in 3D-core sandwich composite structure

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