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Journal articles on the topic 'Composite Honeycomb Sandwich Panels'

Author: Grafiati

Published: 4 June 2021

Last updated: 6 September 2023

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1

Im, Kwang-Hee, Sun-Kyu Kim, Jong-An Jung, Young-Tae Cho, Yong-Deuck Woo, and Chien-Ping Chiou. "NDE Terahertz Wave Techniques for Measurement of Defect Detection on Composite Panels of Honeycomb Sandwiches." Electronics 9, no. 9 (2020): 1360. http://dx.doi.org/10.3390/electronics9091360.

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Terahertz wave (T-ray) technologies have become a popular topic in scientific research over the last two decades, and can be utilized in nondestructive evaluation (NDE) techniques. This study suggests an optimal scanning technique method for honeycomb sandwich composite panels, where skins were utilized with two different skins, namely, carbon fiber-reinforced plastic (CFRP) skin and glass fiber-reinforced plastic (GFRP) skin, as layers of the panel surfaces. Foreign objects were artificially inserted between the skins and honeycomb cells in the honeycomb sandwich composite panels. For this ex

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SKOVAJSA, MICHAL, FRANTISEK SEDLACEK, and MARTIN MRAZEK. "DETERMINATION OF MECHANICAL PROPERTIES OF COMPOSITE SANDWICH PANEL WITH ALUMINIUM HONEYCOMB CORE." MM Science Journal 2021, no. 6 (2021): 5353–59. http://dx.doi.org/10.17973/mmsj.2021_12_2021132.

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This paper deal with comparison of mechanical properties of composite sandwich panel with aluminium honeycomb core which is determined by experimental measurement, analytic calculation and numerical simulation. The goal was to compared four composite sandwich panels. The composite sandwich panels were made of two different aluminium honeycomb cores with density 32 and 72 kg.m-3 and two different layup of skin with 4 and 5 layers. The comparison was performed on a three-point bend test with support span 400 mm. This paper confirms the possibility of a very precise design of a composite sandwich

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Marsono, Marsono, Sarah Fauziyyah Hanifa, and Faizal Akbar. "Pembuatan dan Pengujian Panel Honeycomb Sandwich dengan Inti Berbentuk Gelombang Berbahan Komposit Serat Bambu." Jurnal Rekayasa Hijau 5, no. 2 (2021): 165–77. http://dx.doi.org/10.26760/jrh.v5i2.165-177.

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ABSTRAKDalam penelitian ini, komposit serat bambu dibuat menjadi panel struktur honeycomb sandwich dan diuji untuk mengukur kemungkinan pemanfaatannya sebagai bahan untuk membuat sudu turbin angin sumbu vertical. Honeycomb sanwich serat bambu yang dibuat memiliki inti (core) yang berbentuk gelombang sinus pada arah memanjang panel. Sebagai pengikat pada komposit ini digunakan resin polyester. Panel honeycomb sandwich yang dibuat memiliki panjang 500mm dan lebar 200mm, sedangkan tebal panel dibuat dengan dua variasi, yaitu dengan tinggi inti honeycomb 12mm dan 17mm. Panel honeycomb sandwich ini

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Shi, Shanshan, Bingzhi Chen, and Zhi Sun. "Equivalent properties of composite sandwich panels with honeycomb–grid hybrid core." Journal of Sandwich Structures & Materials 22, no. 6 (2018): 1859–78. http://dx.doi.org/10.1177/1099636218789615.

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Combining the complementary properties of honeycomb cores and grid cores, a composite sandwich panel with honeycomb–grid hybrid core was proposed to enhance the structural performance of composite sandwich panels. However, important gaps remain in calculating the structural performance of the composite sandwich panels. In this paper, an equivalent stiffness model was proposed to analytically estimate the stiffness matrix of composite sandwich panels with honeycomb–grid hybrid core. The reliability and accuracy of the equivalent stiffness model were verified by experimental measurements from th

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Wang, Yongwei, Deng Zhou, Gang Yan, and Zhuangjie Wang. "Experimental and Numerical Study on Residual Strength of Honeycomb Sandwich Composite Structure after Lightning Strike." Aerospace 9, no. 3 (2022): 158. http://dx.doi.org/10.3390/aerospace9030158.

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Honeycomb sandwich composite structures are widely used in various aircraft structures due to their unique performance. However, honeycomb sandwich composite structures are prone to lightning damage that threatens the structure safety. Therefore, it is necessary to assess the residual mechanical properties of honeycomb sandwich composite structures after a lightning strike. In this study, simulated lightning strike tests were first conducted for honeycomb sandwich panels with and without carbon nanotube film (CNTF) to obtain different damage scenarios and study the protection effect of CNTF. T

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Yang, Xiao Jun, Qing Shan Lan, and Yu Ning Zhong. "Buckling Analysis and Experiment of Fiber-Paper Honeycomb Sandwich Structure Composites." Advanced Materials Research 314-316 (August 2011): 566–70. http://dx.doi.org/10.4028/www.scientific.net/amr.314-316.566.

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The aim of this paper is to present a finite element method to predict buckling characteristics of paper honeycomb sandwich panels with composite skins under dynamic axial compression via ANSYS/LS-DYNA. First of all, some problems of the conventional method using honeycomb plate theory, sandwich laminboard theory and equivalent panel theory were pointed out. In order to develop an effective predicting method, by assuming appropriate periodic boundary condition on the edges, a simplified finite element model on hexagonal structure of a unit cell for sandwich panels was developed utilizing the 3

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LIU, J., Y. S. CHENG, R. F. LI, and F. T. K. AU. "A SEMI-ANALYTICAL METHOD FOR BENDING, BUCKLING, AND FREE VIBRATION ANALYSES OF SANDWICH PANELS WITH SQUARE-HONEYCOMB CORES." International Journal of Structural Stability and Dynamics 10, no. 01 (2010): 127–51. http://dx.doi.org/10.1142/s0219455410003361.

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A semi-analytical method for bending, global buckling, and free vibration analyses of sandwich panels with square-honeycomb cores is presented. The discrete geometric nature of the square-honeycomb core is taken into account by treating the core sheets as thin beams and the sandwich panel as composite structure of plates and beams with proper displacement compatibility. Based on the classical model of sandwich panels, the governing equations of motion of the discrete structure are derived using Hamilton's principle. Closed-form solutions are developed for bending, global buckling, and free vib

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Seo, Sung Il, Jung Seok Kim, Se Hyun Cho, and Seong Chul Kim. "Manufacturing and Mechanical Properties of a Honeycomb Sandwich Panel." Materials Science Forum 580-582 (June 2008): 85–88. http://dx.doi.org/10.4028/www.scientific.net/msf.580-582.85.

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Sandwich panels are widely used in the main structure of aircrafts and ships because of their lightweight, high strength, stiffness, durability, and corrosion resistance. The present paper proposes a manufacturing process of a carbody structure of rolling stock using a composite honeycomb sandwich panel. The panel is made of carbon/epoxy composite faces and an aluminum core. The faces bear bending loads and the core shearing load. A product is manufactured by lay-up of composite material on the mold of the product in final dimensions; then cured in a large autoclave for obtaining one body of a

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Ren, Jin, Yutaka Iwakawa, and Jian Mei He. "An Evaluation on Impact Performance of Light-Weight Composite Honeycomb Sandwich Panels." Applied Mechanics and Materials 423-426 (September 2013): 78–83. http://dx.doi.org/10.4028/www.scientific.net/amm.423-426.78.

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A honeycomb core sandwich panel is superior in impact absorption under whole surface compression, because of the buffer effect of core. However impact properties of honeycomb sandwich panels under local compressions such as drop weight impact are affected by the plates as the face sheets in addition to the core layers. This research describes the drop weight impact properties of honeycomb sandwich panels which consist of various aluminum-alloy honeycomb cores and CFRP composite laminate faces through the spindle falling experiments. In order to confirm the validity of the experiments convictiv

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Franco-Urquiza, Edgar Adrián, Perla Itzel Alcántara Llanas, Victoria Rentería-Rodríguez, et al. "Innovation in Aircraft Cabin Interior Panels. Part II: Technical Assessment on Replacing Glass Fiber with Thermoplastic Polymers and Panels Fabricated Using Vacuum Forming Process." Polymers 13, no. 19 (2021): 3258. http://dx.doi.org/10.3390/polym13193258.

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The manufacturing process of the aircraft cabin interior panels is expensive and time-consuming, and the resulting panel requires rework due to damages that occurred during their fabrication. The aircraft interior panels must meet structural requirements; hence sandwich composites of a honeycomb core covered with two layers of pre-impregnated fiberglass skin are used. Flat sandwich composites are transformed into panels with complex shapes or geometries using the compression molding process, leading to advanced manufacturing challenges. Some aircraft interior panels are required for non-struct

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Kim, Hong Gun, Young Jun Kim, Hee Jae Shin, et al. "A Study on the Bending Analysis of the Al Honeycomb Core Sandwich Composite Panel Bearing Large Bending Load." Advanced Materials Research 702 (May 2013): 245–52. http://dx.doi.org/10.4028/www.scientific.net/amr.702.245.

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Al honeycomb core sandwich composite panels have different core and plate materials. The core is the Al honeycomb core, and the thin plate is GFRP sheets with fibers laminated in the 0°/90° symmetric structure. The Al honeycomb core sandwich composite panel is used for structures, which involve relatively high bending load. Before designing the structures, their stability is evaluated via the finite element analysis. In this study, an analysis method that is closest to the reality was proposed for designing the structures with Al honeycomb core sandwich composite panels. For that purpose, the

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12

Shen, Yang. "Numerical Simulation of Impact Resistance of Composite Honeycomb Sandwich Radome under High-Speed Impact." Journal of Physics: Conference Series 2179, no. 1 (2022): 012017. http://dx.doi.org/10.1088/1742-6596/2179/1/012017.

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Abstract In order to study the impact resistance and dynamic response of the composite honeycomb sandwich radome under high-speed bird impact, a simulation model of the bird impacting composite honeycomb sandwich radome with glass fiber reinforced composite (GFRP) panel and meta-aromatic polyphthalamide honeycomb (NOMEXR) core is established through the finite element simulation software LS-DYNA. The effects of thickness distribution of the upper and lower panels of the radome, and the layering angle of the upper panel on the impact resistance of the radome are studied. The research results sh

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Lee, Jae Heon, Seong Kyun Cheong, and Ki Hoon Shin. "Impact Characteristics of a Honeycomb Sandwich Panel." Key Engineering Materials 326-328 (December 2006): 1761–64. http://dx.doi.org/10.4028/www.scientific.net/kem.326-328.1761.

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The concept of light weight design will be very helpful for the tilting train to travel around a curve at a faster speed because the light weight car body makes the center of gravity lower. The impact characteristics of composite materials should be investigated because the impact property of composites is very important. This paper investigates the low-velocity impact characteristics and residual strength conducted on honeycomb sandwich panels. Low-velocity impact tests were carried out at different energy levels on honeycomb sandwich panels using a drop-weight apparatus. The impact-induced d

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14

Wang, Luyao, and Liming Dai. "Vibro-acoustical responses of a sandwich panel consist of aluminum honeycomb core and fabric-reinforced graphite facings." Journal of Sandwich Structures & Materials 24, no. 2 (2021): 1407–28. http://dx.doi.org/10.1177/1099636220982468.

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This research presents a numerical study on vibro-acoustic and sound transmission loss behavior of an aluminum honeycomb core sandwich panel with fabric-reinforced graphite (FRG) composite face sheets. The sandwich theory, which assumes the honeycomb core as an orthotropic structural layer, is applied to investigate the free and forced vibration behavior of the panel. The radiated sound power from the panel is quantified by Rayleigh integral method, and the random diffuse field as an incident sound source is derived based on finite element method with the employment of ACTRAN. A validation bet

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15

Shahbazi, Sepideh, Nicholas Singer, Muslim Majeed, Miroslava Kavgic, and Reza Foruzanmehr. "Cementitious Insulated Drywall Panels Reinforced with Kraft-Paper Honeycomb Structures." Buildings 12, no. 8 (2022): 1261. http://dx.doi.org/10.3390/buildings12081261.

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Standard building practices commonly use gypsum-based drywall panels on the interior wall and ceiling applications as a partition to protect the components of a wall assembly from moisture and fire to uphold the building code and ensure safety standards. Unfortunately, gypsum-based drywall panels have poor resistance to water and are susceptible to mold growth in humid climates. Furthermore, the accumulation of drywall in landfills can result in toxic leachate impacting the surrounding environment. A proposed solution to the pitfalls of gypsum-based drywall arises in its substitution with a ne

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16

Jayaram, R. S., V. A. Nagarajan, and K. P. Vinod Kumar. "Mechanical performance of polyester pin-reinforced foam filled honeycomb sandwich panels." Science and Engineering of Composite Materials 25, no. 4 (2018): 797–805. http://dx.doi.org/10.1515/secm-2017-0039.

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Abstract Honeycomb sandwich panels entice continuously enhanced attention due to its excellent mechanical properties and multi-functional applications. However, the principal problem of sandwich panels is failure by face/core debond. Novel lightweight sandwich panels with hybrid core made of honeycomb, foam and through-thickness pin was developed. Reinforcing polyester pins between faces and core is an effectual way to strengthen the core and enhance the interfacial strength between the face/core to improve the structural performance of sandwich panels. To provide feasibility for pin reinforce

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17

Zhou, Xiang, Zhandong MA, and Xiaofei Liu. "Impact Damage Characteristics of Quartz Fiber and NOMEX Paper Honeycomb Sandwich Panel composite materials." Journal of Physics: Conference Series 2194, no. 1 (2022): 012013. http://dx.doi.org/10.1088/1742-6596/2194/1/012013.

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Abstract To provide a reference for practical engineering application of fiber composite materials, this work researches on the impact resistance of type-B quartz fiber/modified cyanate ester composite material laminates and NOMEX paper honeycomb sandwich panels. Firstly, low-speed impact tests are carried out on the quartz fiber laminates and the NOMEX paper honeycomb sandwich panels by setting different parameters to analyze the impact energy and punch mass on impact damage; secondly, based on the experimental results, impact responses are analyzed; and the damage morphology of the two compo

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18

Fan, Xue Mei, Jian Feng Wang, Cheng Jin Duan, Xiang Xin Xia, and Zhao Hui Wang. "Study on Automobile Body Performance of Honeycomb Sandwich Composite Material." Advanced Materials Research 567 (September 2012): 146–49. http://dx.doi.org/10.4028/www.scientific.net/amr.567.146.

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In order to analyze the mechanical properties of Carbon/epoxy facings-Aluminum honeycomb sandwich structure, we simulated panels of different layers and core thickness using ABAQUS finite element analysis program. And three-point bending tests and shear tests were made on the same panels using electronic universal testing machine. In addition, we also made the same three-point bending tests on steel tubes to get a comparison with honeycomb sandwich panels. It could be seen that, the simulated results were basically identified with experimental results. The results indicated that core thickness

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19

Kim, Yong‐Joe. "Acoustical characteristics of honeycomb sandwich composite panels." Journal of the Acoustical Society of America 129, no. 4 (2011): 2415. http://dx.doi.org/10.1121/1.3587879.

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Renji, K., P. S. Nair, and S. Narayanan. "MODAL DENSITY OF COMPOSITE HONEYCOMB SANDWICH PANELS." Journal of Sound and Vibration 195, no. 5 (1996): 687–99. http://dx.doi.org/10.1006/jsvi.1996.0456.

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RENJI, K., and S. SHANKAR NARAYAN. "LOSS FACTORS OF COMPOSITE HONEYCOMB SANDWICH PANELS." Journal of Sound and Vibration 250, no. 4 (2002): 745–61. http://dx.doi.org/10.1006/jsvi.2001.3602.

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Surya Kiran, M. Phani, I. Balasundar, K. Gopinath, and T. Raghu. "Parametric study on factors influencing the stiffness of honeycomb sandwich panels using impulse excitation technique." Journal of Sandwich Structures & Materials 21, no. 1 (2017): 115–34. http://dx.doi.org/10.1177/1099636216686649.

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Metallic thermal protection systems are used to protect the airframe and pay load from aerodynamic and aerothermal heating in hypersonic cruise vehicles that are powered with advanced scramjet engines. Metallic thermal protection systems is a composite structure that contains honeycomb sandwich panels at the top and bottom and a variety of thermal insulating materials placed in between them. Several design factors influence the structural and thermal performance of the honeycomb sandwich panels. Panel bending stiffness is one important structural property that is generally estimated using a de

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Im, Kwang-Hee, Sun-Kyu Kim, Jong-An Jung, Young-Tae Cho, Yong-Deuck Woo, and Chien-Ping Chiou. "NDE Detection Techniques and Characterization of Aluminum Wires Embedded in Honeycomb Sandwich Composite Panels Using Terahertz Waves." Materials 12, no. 8 (2019): 1264. http://dx.doi.org/10.3390/ma12081264.

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For many years, scientists have been aware of the importance of terahertz waves (T-rays), which have now emerged as an NDE (nondestructive evaluation) technique for certain ranges of the electronic spectrum. The present study deals with T-ray scanning techniques of honeycomb sandwich composite panels with a carbon-fiber-reinforced plastic (CFRP) skin as well as the refractive index (n), and the electrical conductivity (α) of glass fiber-reinforced plastic (GFRP) composites. For this experiment, the degree of penetration to FRP composites is investigated for the THz transmitted power based on t

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Upadhyay, V., and Anindya Bhar. "FINITE-ELEMENT ANALYSIS OF HYBRID GRID-STIFFENED HONEYCOMB CORE SANDWICH PLATES FOR STRUCTURAL PERFORMANCE ENHANCEMENT." Composites: Mechanics, Computations, Applications: An International Journal 14, no. 2 (2023): 79–97. http://dx.doi.org/10.1615/compmechcomputapplintj.v14.i2.80.

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Use of honeycomb sandwich structures is increasing in many engineering applications in aircraft, automobile, and other industries, due to their high flexural strength-to-weight ratio. Naturally, the challenge on further increasing their strength-to-weight ratio is an active research objective in this area. Grid stiffeners are known for their high bending strength. Hence, to combine the advantages of both of the honeycomb core and grid stiffeners, this paper investigates the possibility of enhancing the structural performance of composite sandwich panels by using a hybrid-grid-stiffened honeyco

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Rajkumar, S., B. Arulmurugan, M. Manikandan, R. Karthick, and S. Kaviprasath. "Analysis of Physical and Mechanical Properties of A3003 Aluminum Honeycomb Core Sandwich Panels." Applied Mechanics and Materials 867 (July 2017): 245–53. http://dx.doi.org/10.4028/www.scientific.net/amm.867.245.

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The demand for lightweight structures made of sandwich panels is ever increasing in many Industrial sectors. Numerous research efforts have been taken by various researchers in this area in terms of weight and cost reduction. Sandwich panel is a composite structure and it is an excellent alternative material in place of weight reduction without sacrificing its strength and stiffness characteristics. The geometrical characteristics of honeycomb core sandwich panels as well as their physical and mechanical properties such as compressive strength, flexural stiffness, core shear moduli, shear stre

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Tang, Wing-Cheong. "Low Frequency Acoustic Performance in Ducts Using Honeycomb Layer Systems." Building Acoustics 15, no. 1 (2008): 21–34. http://dx.doi.org/10.1260/135101008784050188.

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The use of composite materials, like honeycomb structures, in the building industry is growing rapidly, due to their superior performance (very high Sound Transmission Loss) and significant weight reduction over conventional materials. An experimental investigation into low-frequency duct noise reduction using honeycomb sandwich panels is presented. Composite sandwich structures with an air gap between panels provide low-frequency sound absorption. The waves in the duct are coupled with those in the porous layer and the air cavities. The energy is dissipated as a result of the resonant mass-sp

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Komarov, V. A., and S. A. Pavlova. "Optimal design of sandwich floor panels made of high-strength composite materials considering stiffness constraints." VESTNIK of Samara University. Aerospace and Mechanical Engineering 20, no. 2 (2021): 45–52. http://dx.doi.org/10.18287/2541-7533-2021-20-2-45-52.

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The article considers the challenge of designing sandwich floor panels made of high-strength composites considering stiffness constraints. A dimensionless criterion is proposed for assessing the stiffness of floor panels. A new constraint equation determines an interrelation between geometrical parameters of composite constructions and a given criterion. A demo example and the results of designing a typical floor panel using a high-strength composite material are presented. The mass of a square meter of the structure is considered as an objective function, and the thickness of the skin and the

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Abbasloo, Aslan, and Mohamad Reza Maheri. "On the mechanisms of modal damping in FRP/honeycomb sandwich panels." Science and Engineering of Composite Materials 25, no. 4 (2018): 649–60. http://dx.doi.org/10.1515/secm-2015-0444.

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Abstract Sandwich panels made of fibre-reinforced plastic (FRP) skins and a honeycomb core can be effectively damped through the choice of the skin and especially of the core materials. Because the core is often highly damped, a lateral deflection that causes more shearing of the core than bending of the skin increases sandwich damping. Aside from the skin and the core material properties, the shearing/bending ratio depends on a number of other, often interacting, factors, including the sandwich planar as well as transverse dimensions, the particular modal pattern in which the panel vibrates a

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Li, Chang Liang, Da Zhi Jiang, Jing Cheng Zeng, and Su Li Xing. "Dynamic Response and Damage Mechanism of Two-Core Composite Sandwich Panels under Low-Velocity Impact." Applied Mechanics and Materials 405-408 (September 2013): 2810–14. http://dx.doi.org/10.4028/www.scientific.net/amm.405-408.2810.

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Dynamic response and damage mechanism of two-core sandwich panels with foam and honeycomb cores and glass fiber/epoxy composite sheets under low-velocity transverse impact are investigated. The emphasis is focused on the contact force response and crash mechanism of the two-core sandwich panels. Effects of configurations, impact energy levels and types of the cores on the dynamic response are investigated. A modified drop-test experiment is carried out to obtain contact force history of the two-core sandwich structures under different impact energies. The experimental results show that the 10:

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Čapka, Alexander, Vladimir Platonovič Vavilov, Soňa Rusnáková, Ladislav Fojtl, Milan Žaludek, and Lukáš Maňas. "Detecting Water in Composite Sandwich Panels by Using Infrared Thermography." Materials Science Forum 891 (March 2017): 516–21. http://dx.doi.org/10.4028/www.scientific.net/msf.891.516.

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Honeycomb composite structures widely used in aviation are sturdy and light-weight but they may accumulate water from the atmosphere during aircraft operation. The presence of water in honeycomb cells leads to a higher airplane mass and excessive corrosion of aluminum cores, while the frozen water endangers panel integrity. This work describes the use of infrared thermography for detecting water trapped in aviation honeycomb cells.

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Amir, Abd Latif, Mohammad Ridzwan Ishak, Noorfaizal Yidris, Mohamed Yusoff Mohd Zuhri, Muhammad Rizal Muhammad Asyraf, and Sharifah Zarina Syed Zakaria. "Influence of Woven Glass-Fibre Prepreg Orientation on the Flexural Properties of a Sustainable Composite Honeycomb Sandwich Panel for Structural Applications." Materials 16, no. 14 (2023): 5021. http://dx.doi.org/10.3390/ma16145021.

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Owing to the high potential application need in the aerospace and structural industry for honeycomb sandwich composite, the study on the flexural behaviour of sandwich composite structure has attracted attention in recent decades. The excellent bending behaviour of sandwich composite structures is based on their facesheet (FS) and core materials. This research studied the effect of woven glass-fibre prepreg orientation on the honeycomb sandwich panel. A three-point bending flexural test was done as per ASTM C393 standard by applying a 5 kN load on different orientation angles of woven glass-fi

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Wolff, Ernest G., Hong Chen, and Darrell W. Oakes. "Hygrothermal Deformation of Composite Sandwich Panels." Advanced Composites Letters 9, no. 1 (2000): 096369350000900. http://dx.doi.org/10.1177/096369350000900104.

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Coefficients of thermal and moisture expansion (CTE and CME) can be predicted for many composite laminates and sandwich panels. Core and adhesive properties, such as geometry and stiffness are important variables. Laminate theory is augmented with a modified model for anisotropic core properties to predict the CTE and CME of sandwich panels. Procedures to measure both CTE and CME are described. Since these are thermodynamic properties, methods to obtain equilibrium moisture strains are needed. Results are given for CFRP facesheets with Al and NOMEX honeycomb cores, and for woven Kevlar faceshe

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Michalski, Mateusz, and Wojciech Krauze. "Influence of Honeycomb Core Stabilization on Composite Sandwich Structure Geometry." Transactions on Aerospace Research 2019, no. 3 (2019): 1–13. http://dx.doi.org/10.2478/tar-2019-0013.

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Abstract Authors showed the influence of stabilization of the honeycomb core on shape of the composite sandwich test panel. Adhesive film laid on core ramps and cured with suitable cure cycle served as core stabilizer. Test panel geometry included different ramp angles (20° and 30°). To verify stabilization process a technology trial was performed. Three test panels were manufactured (3-stage, 1-stage and 1-stage with stabilized core). All test panels were manufactured in OoA process (Out of Autoclave). Panel surfaces were scanned with 3D scanner and compared with the reference CAD model. Both

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Yutaka, Iwakawa, Takahisa Machida, Mitsuo Kobayashi, and Jian Mei He. "Investigation on Impact Performance of Light-Weight Composite Honeycomb Sandwich Panels." Applied Mechanics and Materials 249-250 (December 2012): 949–53. http://dx.doi.org/10.4028/www.scientific.net/amm.249-250.949.

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In this study, the relationship between the impact performances of light-weight honeycomb sandwich composite panels with design parameters like panel cores and face’s thicknesses and materials, honeycomb foil thickness and cell size etc. are experimentally evaluated through the spindle falling tests. Analytical approaches are also carried out to confirm the validity of the experiments based on 3D modeling and using ANSYS LS-DYNA software. Comparisons of the experimental and analytical results are reported in this study.

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Ramly, Ramzyzan, Wahyu Kuntjoro, and Mohd Kamil Abd Rahman. "Embedded FBG Sensor in Aircraft Smart Composite Materials for Structural Monitoring." Applied Mechanics and Materials 393 (September 2013): 311–16. http://dx.doi.org/10.4028/www.scientific.net/amm.393.311.

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This paper describes the use of embedded Fiber Brag Grating (FBG) sensor in the honeycomb core carbon fiber sandwich panel in smart composite materials for the application of monitoring the structural integrity of an aircraft. A part of vertical stabilizer was selected and reproduced using carbon fiber honeycomb core sandwich panels. The sandwich panel was fabricated in accordance to the generic sandwich structure and aviation industry standards, including the materials and also the method of construction. Using a carbon fiber from Hexcel as the face-sheet, Nomex honeycomb as the core, the san

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Butukuri, R. R., V. P. Bheemreddy, K. Chandrashekhara, T. R. Berkel, and K. Rupel. "Evaluation of skin-core adhesion bond of out-of-autoclave honeycomb sandwich structures." Journal of Reinforced Plastics and Composites 31, no. 5 (2012): 331–39. http://dx.doi.org/10.1177/0731684412437267.

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Composite sandwich structures offer several advantages over conventional structural materials such as lightweight, high bending and torsional stiffness, superior thermal insulation and excellent acoustic damping. One failure mechanism in a composite sandwich structure is the debonding of the composite facesheets from the core structure. A well-formed adhesive fillet at the interface of the honeycomb core cell walls and the laminate is a significant factor in preventing bond failure. In the present work, honeycomb composite sandwich panels are manufactured using a low-cost vacuum-bag-pressure-o

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Labib Adyavit, Muhammad, Larasati Irischa Ramadhani, and Steven Steven. "Kajian Material Komposit Sandwich pada Floor Panel Pesawat Terbang." Mesin 29, no. 1 (2023): 45–63. http://dx.doi.org/10.5614/mesin.2023.29.1.4.

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Sandwich composites have been used as lightweight materials in aircraft manufacturing for a long time, from balsa wood sandwich in the 1930s to honeycomb and fiber-reinforced polymers sandwich. Its characteristics are considered as a 'perfect' material for aircraft, which has high strength with low density. Sandwich composites are the common materials for aircraft floor panels. The core is usually made of Nomex or aluminum honeycomb, while the skin is made of 1 "“ 2 ply of carbon/glass fiber in epoxy resin composite. The core is usually constructed using the corrugating or expansion method, wh

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Chen, An, Wei Feng Zang, and Lei Li. "Compressive Strength Experiment of Honeycomb Sandwich Composite Panel." Key Engineering Materials 907 (January 21, 2022): 136–41. http://dx.doi.org/10.4028/www.scientific.net/kem.907.136.

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The experimental investigation on the compressive properties of honeycomb sandwich composite panels was carried out in this paper. The local compressive specimens and global compressive specimens were manufactured for compressive experiment. The test fixture has been designed and manufactured to examine the compressive behavior of honeycomb sandwich panel. The results indicate that there is no buckling occurred in local compressive specimen skin during the whole compressive experiment. The average failure load of local compressive specimens is 106884 N. The local buckling increases with the lo

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Naseer, Zainab, and Zaffar Khan. "Graphene Effect on Mechanical Properties of Sandwich Panel for Aerospace Structures." Key Engineering Materials 875 (February 2021): 121–26. http://dx.doi.org/10.4028/www.scientific.net/kem.875.121.

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This research examines the mechanical properties of graphene-based polymer composites and Nomex honeycomb sandwich using a new strain sensing technique. Sandwich panels are fabricated individually with glass fibre reinforced polymers (GFRP) and face-sheets having different filler ratios of graphene nanoparticles (GNPs). These graphene nanoparticles are oxidized with (UV-O3) ozone to get graphene oxide (GO) which in turn improves resin matrix interfacial strength. Filler ratios of GO 0.0%, 0.2%, 0.6% and 1.0% by weight of poly-epoxy are fabricated for the face-sheets of composite sandwich panel

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Tarpani, José R., and Alexandre MA Portela. "Magnetic resonance imaging of contaminated and damaged core cells in polymer composite sandwich panels." Journal of Sandwich Structures & Materials 20, no. 7 (2017): 831–60. http://dx.doi.org/10.1177/1099636216681698.

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Computed tomography magnetic resonance imaging has been successfully applied to fully detect typical aircraft hydrogen-rich liquid contaminants entrapped in honeycomb core cells of structural polymer composite sandwich panels. With the aid of Bayesian-based image processing toolbox, the quantification, identification, and discrimination of the contaminants were also rapidly accomplished. Computed tomography magnetic resonance imaging has also been auspiciously applied to accurately define the extent of crushed-core damage in liquid impregnated honeycomb cells. Presented results strengthen the

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Schubert, Martin, and Anthanasios Dafnis. "Multifunctional load-bearing aerostructures with integrated space debris protection." MATEC Web of Conferences 304 (2019): 07003. http://dx.doi.org/10.1051/matecconf/201930407003.

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In the project multiSat multifunctional composite structures for satellite application have been developed. Functions such as protection against space debris, radiation shielding and passive thermal control have been integrated into the load-bearing composite spacecraft structure by use of suitable materials and components. Sandwich panels have been studied as representative structural parts of a conventional satellite structure. Measures for increased space debris protection include the substitution of the conventional honeycomb core by 3D-printed aluminum cellular structures and the reinforc

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Krzyżak, Aneta, Michał Mazur, Mateusz Gajewski, Kazimierz Drozd, Andrzej Komorek, and Paweł Przybyłek. "Sandwich Structured Composites for Aeronautics: Methods of Manufacturing Affecting Some Mechanical Properties." International Journal of Aerospace Engineering 2016 (2016): 1–10. http://dx.doi.org/10.1155/2016/7816912.

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Sandwich panels are composites which consist of two thin laminate outer skins and lightweight (e.g., honeycomb) thick core structure. Owing to the core structure, such composites are distinguished by stiffness. Despite the thickness of the core, sandwich composites are light and have a relatively high flexural strength. These composites have a spatial structure, which affects good thermal insulator properties. Sandwich panels are used in aeronautics, road vehicles, ships, and civil engineering. The mechanical properties of these composites are directly dependent on the properties of sandwich c

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Miranda, A., M. Leite, L. Reis, E. Copin, MF Vaz, and AM Deus. "Evaluation of the influence of design in the mechanical properties of honeycomb cores used in composite panels." Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications 235, no. 6 (2021): 1325–40. http://dx.doi.org/10.1177/1464420720985191.

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The aerospace, automotive, and marine industries are heavily reliant on sandwich panels with cellular material cores. Although honeycombs with hexagonal cells are the most commonly used geometries as cores, recently there have been new alternatives in the design of lightweight structures. The present work aims to evaluate the mechanical properties of metallic and polymeric honeycomb structures, with configurations recently proposed and different in-plane orientations, produced by additive and subtractive manufacturing processes. Structures with configurations such as regular hexagonal honeycom

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Abbadi, Ahmed, Y. Koutsawa, A. Carmasol, S. Belouettar, and Z. Azari. "Experimental and numerical characterization of honeycomb sandwich composite panels." Simulation Modelling Practice and Theory 17, no. 10 (2009): 1533–47. http://dx.doi.org/10.1016/j.simpat.2009.05.008.

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Lascano, Diego, Rene Guillen-Pineda, Luis Quiles-Carrillo, et al. "Manufacturing and Characterization of Highly Environmentally Friendly Sandwich Composites from Polylactide Cores and Flax-Polylactide Faces." Polymers 13, no. 3 (2021): 342. http://dx.doi.org/10.3390/polym13030342.

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This work focuses on the manufacturing and characterization of highly environmentally friendly lightweight sandwich structures based on polylactide (PLA) honeycomb cores and PLA-flax fabric laminate skins or facings. PLA honeycombs were manufactured using PLA sheets with different thicknesses ranging from 50 to 500 μm. The PLA sheets were shaped into semi-hexagonal profiles by hot-compression molding. After this stage, the different semi-hexagonal sheets were bonded together to give hexagonal panels. The skins were manufactured by hot-compression molding by stacking two Biotex flax/PLA fabrics

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Khodaei, Meysam, Mojtaba Haghighi-Yazdi, and Majid Safarabadi. "Numerical modeling of high velocity impact in sandwich panels with honeycomb core and composite skin including composite progressive damage model." Journal of Sandwich Structures & Materials 22, no. 8 (2018): 2768–95. http://dx.doi.org/10.1177/1099636218817894.

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In this paper, a numerical model is developed to simulate the ballistic impact of a projectile on a sandwich panel with honeycomb core and composite skin. To this end, a suitable material model for the aluminum honeycomb core is used taking the strain-rate dependent properties into account. To validate the ballistic impact of the projectile on the honeycomb core, numerical results are compared with the experimental results available in literature and ballistic limit velocities are predicted with good accuracy. Moreover, to achieve composite skin material model, a VUMAT subroutine including dam

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Khalid, Ahmed Ali, Fadhel Abbas Abdulla, and Mushtaq Al-Sharify. "Experimental Investigation on the Fatigue Behavior on Honeycomb Sandwich Composite Panels." Tikrit Journal of Engineering Sciences 30, no. 2 (2023): 122–29. http://dx.doi.org/10.25130/tjes.30.2.13.

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This paper aims to study the dynamic behaviors of particular sandwich panels manufactured using three specifications of aluminum honeycomb core with fiberglass or aluminum face-sheet materials. Three groups of panels were designed and manufactured, each including three different sorts of samples, all fabricated with the same thickness. A cantilever fatigue test was conducted on specimens, and the results were collected and presented in curves to detect the factors that affect the panel's endurance. The finding showed that the specimens with aluminum skin had more probability of face-sheet/core

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Wang, Yong-jing, Zhi-jia Zhang, Xiao-min Xue, and Ling Zhang. "Free vibration analysis of composite sandwich panels with hierarchical honeycomb sandwich core." Thin-Walled Structures 145 (December 2019): 106425. http://dx.doi.org/10.1016/j.tws.2019.106425.

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Çetin, Mehmet Emin. "Fabrication, characterization and mechanical testing of carbon fiber sandwich composites with nanoparticle included polyurethane adhesives." Journal of Composite Materials 56, no. 4 (2021): 589–603. http://dx.doi.org/10.1177/00219983211058801.

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In honeycomb core and composite face sheet sandwich panels, it is essential to understand the bonding characteristics of adhesive in relevance with its properties to observe synergistic effects of reinforcing nanoparticles such as multi-walled carbon nanotubes (MWCNTs). This study investigates the effects of MWCNT inclusion on polyurethane (PU) adhesive, which directly affects sandwich structures' structural and mechanical performance. MWCNTs are added to PU adhesive up to 0.2%, and their RAMAN spectroscopic analysis, Fourier transform infrared spectroscopy (FT-IR), thermo-gravimetric analyses

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Chen, S., O. P. L. McGregor, A. Endruweit, L. T. Harper, and N. A. Warrior. "Simulation of the forming process for curved composite sandwich panels." International Journal of Material Forming 13, no. 6 (2019): 967–80. http://dx.doi.org/10.1007/s12289-019-01520-4.

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AbstractFor affordable high-volume manufacture of sandwich panels with complex curvature and varying thickness, fabric skins and a core structure are simultaneously press-formed using a set of matched tools. A finite-element-based process simulation was developed, which takes into account shearing of the reinforcement skins, multi-axial deformation of the core structure, and friction at the interfaces. Meso-scale sandwich models, based on measured properties of the honeycomb cell walls, indicate that panels deform primarily in bending if out-of-plane movement of the core is unconstrained, whil

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