Inserts thermal coupling analysis in hexagonal honeycomb plates used for satellite structural design

Boudjemai, A.; Mankour, Abdeljelil; Salem, H.; Amri, R.; Hocine, R.; Chouchaoui, Ben

doi:10.1016/j.applthermaleng.2014.03.060

Cited by 15 publications

(3 citation statements)

References 17 publications

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“…In aerospace structures, honeycomb panels are widely used as wall panels and wing panels. Carbon-fiber aluminum honeycomb sandwich panels are lightweight, have strong load-bearing performance, and provide vibration isolation and energy absorption [ 4 , 5 ]. However, when subjected to low-velocity impacts, the honeycomb panel structures are prone to damage such as core collapse and surface layer tearing, which affects the performance and reliability of the material structure [ 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

Low-Velocity Impact Localization on a Honeycomb Sandwich Panel Using a Balanced Projective Dictionary Pair Learning Classifier

Zheng

Liang

2021

Sensors

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Carbon-fiber aluminum honeycomb sandwich panels are vulnerable to low-velocity impacts, which can cause structural damage and failures that reduce the bearing performance and reliability of the structure. Therefore, a method for locating such impacts through a sensor network is very important for structural health monitoring. Unlike composite laminates, the stress wave generated by an impact is damped rapidly in a sandwich panel, meaning that the signal qualities measured by different sensors vary greatly, thereby making it difficult to locate the impact. This paper presents a method for locating impacts on carbon-fiber aluminum honeycomb sandwich panels utilizing fiber Bragg grating sensors. This method is based on a projective dictionary pair learning algorithm and uses structural sparse representation for impact localization. The measurement area is divided into several sub-areas, and a corresponding dictionary is trained separately for each sub-area. For each dictionary, the sensors are grouped into main sensors within the sub-area and auxiliary sensors outside the sub-area. A balancing weight factor is added to optimize the proportion of the two types of sensor in the recognition model, and the algorithm for determining the balancing weight factor is designed to suppress the negative effects on the positioning of the sensors with poor signal quality. The experimental results show that on a 300 mm × 300 mm × 15 mm sandwich panel, the impact positioning accuracy of this method is 96.7% and the average positioning error is 0.85 mm, which are both sufficient for structural health monitoring.

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Section: Introductionmentioning

confidence: 99%

Low-Velocity Impact Localization on a Honeycomb Sandwich Panel Using a Balanced Projective Dictionary Pair Learning Classifier

Zheng

Liang

2021

Sensors

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“…The panel face sheets are commonly fabricated using aluminum or graphite/epoxy composite panels. The core is typically fabricated using a honeycomb or aluminum foam construction [4]. The sandwich concept significantly reduces weight and increases stiffness while maintaining strength.…”

Section: Introductionmentioning

confidence: 99%

Temperature Effect on the Modal Frequencies of Aluminum Honeycomb Plate

Amri

2020

AMR

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The aim of this paper is to perform a study on how the elevated temperature and gradient of temperature affect the natural frequencies of aluminum honeycomb plate. This study is carried out for temperature range between 200K and 800K, and gradient temperature (ΔT) across the thickness direction of the plate between [0-500K]. Different honeycomb plate geometries have been selected for the analysis, by changing the core thickness, skins thickness and cell size. The obtained results show that the effect of the temperature is noticeable. At temperature 800K, the natural frequencies decrease by 16.1% in comparison to their values at ambient temperature (300K). That means, high temperature makes the material suffers from weak rigidity, which furthermore contribute to high decrease of all the frequencies. In addition, investigations carried out in this work relate to the modal analysis of the honeycomb plate, under various gradients of temperature across the core of the plate. The obtained results show that the gradient of temperature has an effect on the modes of vibration of the honeycomb plate. This effect becomes significant when the gradient of temperature is very high. At ΔT equal 500K, the natural vibration modes decrease by 9.5% in comparison to the case where no gradient of temperature (ΔT = 0K) is applied between the two faces of the plate. Keywords: honeycomb panel; aluminum; natural frequency; finite element method; temperature.

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“…By and large, when light weight is needed and the outside temperature or service temperature is much higher, the sandwich panel core requires proper geometric considerations. Corrugation, honeycomb, and lattice have all been extensively studied [ 20 , 31 , 32 , 33 , 34 ]. By using additional inner insulation materials or coolants, high service temperatures can be achieved.…”

Section: Introductionmentioning

confidence: 99%

Experimental Assessment of Thermal Performance and Bridging Effects of Low-Cost Sandwich Panels under a High-Temperature Impinging Jet

Cai

Huang

et al. 2020

Materials

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Sandwich panels are commonly used across industries for their ability to bear structural and thermal loads. In this paper, a panel chamber matching apparatus was designed to investigate the thermal performance of eight steel-based panels by exposing them to an impinging jet at approximately 550 °C for 30 min. Three types of low-cost materials (polycrystalline filaments, silica aerogel, and aluminum silicate) were used as the insulation core. The temperature of the panel surfaces was measured, as well as the metallic fasteners, including bolts, nails, battens, seams, and angle iron, to examine their thermal bridge effects. Major conclusions include the following: first, the maximum temperature on the impinged surface was consistent among all 20 cases, whereas that of the surface under free convection varied, ranging from 41 to 120 °C, depending on the core and thermal bridges. Second, most of the highest temperatures on opposite surfaces were caused by a section of bare angle iron, and this bridging effect could be significantly reduced by up to 50 °C using a few layers of cloth, although the improvement could be temporary. Bolts and nails were less effective as thermal bridges, while the battens could be more effective. Third, the estimated heat flux of all specimens ranged from 167 to 331 W·m−2.

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Inserts thermal coupling analysis in hexagonal honeycomb plates used for satellite structural design

Cited by 15 publications

References 17 publications

Low-Velocity Impact Localization on a Honeycomb Sandwich Panel Using a Balanced Projective Dictionary Pair Learning Classifier

Low-Velocity Impact Localization on a Honeycomb Sandwich Panel Using a Balanced Projective Dictionary Pair Learning Classifier

Temperature Effect on the Modal Frequencies of Aluminum Honeycomb Plate

Experimental Assessment of Thermal Performance and Bridging Effects of Low-Cost Sandwich Panels under a High-Temperature Impinging Jet

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