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1

Sharif, Umer, Bei Bei Sun, Peng Zhao, Dauda Sh Ibrahim, Orelaja Oluseyi Adewale, and Aleena Zafar. "Dynamic Behavior Analysis of the Sandwich Beam Structure with Magnetorheological Honeycomb Core under Different Magnetic Intensities: A Numerical Approach." Materials Science Forum 1047 (October 18, 2021): 31–38. http://dx.doi.org/10.4028/www.scientific.net/msf.1047.31.

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In this article a sandwich beam structure with honeycomb core filled of MRE (magnetorheological elastomer) with different ratios of Elastomer and iron particles is proposed. Modal response for structures with Nylon and Resin8000 honeycomb core filled with MRE and sandwiched between aluminum face sheets were analyzed and compared for two different ratios of MRE by placing magnets at free end and center of the structure. The force generated by magnets on the sandwich beam structure was calculated using ANSYS EDT and the modal response of the structure was then observed under generated magnetic f
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2

Atli-Veltin, B., and F. Gandhi. "Energy absorption of sandwiched honeycombs with facesheets under in-plane crushing." Aeronautical Journal 117, no. 1193 (2013): 687–708. http://dx.doi.org/10.1017/s000192400000837x.

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AbstractThe in-plane crushing and energy absorption of sandwiched honeycomb cores with facesheets are examined through finite element simulations. Assuming no debonding between the facesheet and honeycomb core (which would be the case if manufacturing techniques such as brazing are used to produce very strong bonds between the facesheeet and the core), intracellular buckling mode for thin facesheets, and wrinkling mode for thick facesheets are observed. In the dimpling mode, deformation is governed by the core, honeycomb vertical cell walls do not deform, and the inclined wall deformation does
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Liu, Weidong, Honglin Li, Jiong Zhang, and Hongda Li. "Theoretical analysis on the elasticity of a novel accordion cellular honeycomb core with in-plane curved beams." Journal of Sandwich Structures & Materials 22, no. 3 (2018): 702–27. http://dx.doi.org/10.1177/1099636218768174.

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Flexible skin is an essential component for morphing wind turbine blade to maintain a smooth profile and bear aerodynamic loads during morphing. Cellular honeycomb cores with low in-plane and high out-of-plane stiffness are potential candidates for support structures of flexible skin. Honeycomb structure also requires zero Poisson’s ratio to avoid unnecessary stress and strain during one-dimensional morphing. A novel accordion cellular honeycomb core of close-to-zero Poisson’s ratio with in-plane corrugated U-type beams was proposed as a solution for these problems. The elastic properties of t
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4

Li, Chong, Hui-Shen Shen, and Hai Wang. "Nonlinear Vibration of Sandwich Beams with Functionally Graded Negative Poisson’s Ratio Honeycomb Core." International Journal of Structural Stability and Dynamics 19, no. 03 (2019): 1950034. http://dx.doi.org/10.1142/s0219455419500342.

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This paper investigates the nonlinear flexural vibration of sandwich beams with functionally graded (FG) negative Poisson’s ratio (NPR) honeycomb core in thermal environments. The novel constructions of sandwich beams with three FG configurations of re-entrant honeycomb cores through the beam thickness direction are proposed. The temperature-dependent material properties of both face sheets and core of the sandwich beams are considered. 3D full-scale finite element analyses are conducted to investigate the nonlinear vibration, and the variation of effective Poisson’s ratio (EPR) of the sandwic
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5

Zhu, Dalei, Xiaoxin Wang, Shuang Yao, Jianfeng Zhang, and Mengmeng Jiao. "Analytical and experimental study on honeycomb sandwich plates reinforced by ring beam of satellites." Journal of Physics: Conference Series 2472, no. 1 (2023): 012007. http://dx.doi.org/10.1088/1742-6596/2472/1/012007.

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Abstract The equivalent parameters of hexagon aluminum honeycombs are work out with the theories of sandwich plates in this paper. The honeycomb sandwich plate reinforced by ring beam applied with static load is simulated by the finite element model of honeycomb sandwich plates, which is validated by static test. The research results show that the numerical calculation error of the honeycomb sandwich plate is less than 10% compared with test results, which is acceptable for an engineering project, and the mechanical behavior of the honeycomb sandwich plate can be described in detail. Thus, the
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6

Zhu, Xiujie, Chao Xiong, Junhui Yin, Dejun Yin, and Huiyong Deng. "Bending Experiment and Mechanical Properties Analysis of Composite Sandwich Laminated Box Beams." Materials 12, no. 18 (2019): 2959. http://dx.doi.org/10.3390/ma12182959.

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The failure modes, ultimate load, stiffness performance, and their influencing factors of a composite sandwich laminated box beam under three-point bending load are studied by an experiment, finite element model, and analytical method. The three-point bending experiment was carried out on three different core composite sandwich laminated box beams, and the failure modes and bearing capacity were studied. With the use of composite progressive damage analysis and the core elastoplastic constitutive model, the finite element model of the composite sandwich laminated box beam was established, and
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7

ZHU, KAIGE, and DAINING FANG. "CALCULATION OF DISPERSION CURVES FOR ARBITRARY WAVEGUIDES USING FINITE ELEMENT METHOD." International Journal of Applied Mechanics 06, no. 05 (2014): 1450059. http://dx.doi.org/10.1142/s1758825114500598.

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Dispersion curves for waveguide structures are an important prerequisite for the implementation of guided wave-based nondestructive evaluation (NDE) approach. Although many methods exist, each method is only applicable to a certain type of structures, and also requires complex programming. A Bloch theorem-based finite element method (FEM) is proposed to obtain dispersion curves for arbitrary waveguides using commercial finite element software in this paper Dispersion curves can be obtained for a variety of structures, such as homogeneous plates, multilayered structures, finite cross section ro
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8

Sharif, Umer, Lin Chen, Beibei Sun, Dauda Sh Ibrahim, Orelaja Oluseyi Adewale, and Noman Tariq. "An experimental study on dynamic behaviour of a sandwich beam with 3D printed hexagonal honeycomb core filled with magnetorheological elastomer (MRE)." Smart Materials and Structures 31, no. 5 (2022): 055004. http://dx.doi.org/10.1088/1361-665x/ac5c8a.

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Abstract Sandwich beams with an aluminium face sheet and a magnetorheological elastomer (MRE) of varying proportions of elastomer and magnetic particles (weight to weight)% filled in a honeycomb core of Nylon and Resin8000 are manufactured and experimentally analysed in this study. To evaluate the dynamic properties of sandwich beams, manufactured structures subjected to sine sweep and classic shock tests and assessed both with and without magnetic field of varying intensities applied on the free end of the beam. The experimental results demonstrated good performance in vibration level attenua
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9

Gdoutos, E. E., and M. S. Konsta-Gdoutos. "Load and Geometry Effect on Failure Mode Initiation of Composite Sandwich Beams." Applied Mechanics and Materials 3-4 (August 2006): 173–78. http://dx.doi.org/10.4028/www.scientific.net/amm.3-4.173.

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Facing compressive failure, facing wrinkling and core shear failure are the most commonly encountered failure modes in sandwich beams with facings made of composite materials. The occurrence and sequence of these failure modes depends on the geometrical dimensions, the form of loading and type of support of the beam. In this paper the above three failure modes in sandwich beams with facings made of carbon/epoxy composites and cores made of aluminum honeycomb and two types of foam have been investigated. Two types of beams, the simply supported and the cantilever have been considered. Loading i
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10

Meng, Li Qing, Shi Zhe Chen, Yan Wu, and Xue Feng Shu. "Projectile Impact Behaviour of Sandwich Material with Nomex Honeycomb and Metallic Skins." Advanced Materials Research 204-210 (February 2011): 632–35. http://dx.doi.org/10.4028/www.scientific.net/amr.204-210.632.

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Projectile impact test is carried out to investigate damage and failure behaviour under different impact velocity from 90m/s to 160m/s. Strain-time history curve on the control points are analysed in this paper. Sandwich beam dynamic response and the degree of structural degeneration under impact loading both depends on the thickness of metallic skins. The projectile impact test demonstrate difference damage characteristics between the sandwich beams with different thickness skins. The peak stress value are estimated approximately to determine the skin deformation and sandwich beam global dama
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11

Meng, Li Qing, Yan Wu, Shi Zhe Chen, and Xue Feng Shu. "Quasi-Static Failure Analysis of Honeycomb Sandwich Beam with Composite Facesheets." Advanced Materials Research 160-162 (November 2010): 855–59. http://dx.doi.org/10.4028/www.scientific.net/amr.160-162.855.

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Sandwich construction consists of two thin composite or metal facesheets separated by a core material. Despite extensive researches on the sandwich constructions, their mechanical properties and failure behaviours are still not fully understand. The objective of the paper is to use a experimental and theoretical predicting failure mode for sandwich beam consisting of GFRP facesheets and Nomex honeycomb core. Two kinds of composite sandwich beams are observed in quasi-static three-point bending and indentation test.
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12

Kong, Cheol Won, Se Won Eun, Jae Sung Park, et al. "The Effect of a Honeycomb Core on the Mechanical Properties of Composite Sandwich Plates." Key Engineering Materials 297-300 (November 2005): 2752–57. http://dx.doi.org/10.4028/www.scientific.net/kem.297-300.2752.

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When comparing composite sandwich analysis with an exact solution, the results of finite element modeling with an ANSYS shell 91 element agreed well with the exact solution. The practical applications of the shell 91 element are demonstrated with a four-point bend test conducted on sandwich beam specimens. The specimens comprised carbon/epoxy fabric face sheets and a honeycomb core. Two kinds of honeycomb cores were used to fabricate the composite sandwich specimens: an aluminum one and a glass/phenolic one. The predictions with the shell 91 element were also agreed well with the experimental
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13

Yang, Zhifei, and Bojun Mao. "Static and dynamic properties of star-shaped honeycomb sandwich panels." Advances in Engineering Technology Research 10, no. 1 (2024): 479. http://dx.doi.org/10.56028/aetr.10.1.479.2024.

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The star-shaped concave structure material is a new type of negative Poisson’s ratio material, which combines the advantages of negative Poisson’s ratio material and honeycomb material. The negative Poisson’s ratio structure has very good mechanical properties, such as bearing capacity, impact resistance, and shear resistance. The honeycomb sandwich panel is a typical lightweight material with high specific strength, specific stiffness, and good energy absorption characteristics. In this paper, the star-shaped concave structure is used as the core layer of the sandwich panel, and the advantage
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14

Coskun, Onur, and Halit S. Türkmen. "Bending Fatigue Behaviour of Laminated Sandwich Beams." Advanced Materials Research 445 (January 2012): 548–53. http://dx.doi.org/10.4028/www.scientific.net/amr.445.548.

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In this study, the bending fatigue behaviour of laminated sandwich beams, which are made of carbon/epoxy face sheets and aramid honeycomb core, has been investigated experimentally. The wet hand lay-up technique is used and curing is processed on the heated vacuum table at an elevated temperature to manufacture the sandwich beams. The experimental set-up for bending fatigue test provides a cantilever in one end and a cyclic load at the free end with constant displacement amplitude at room temperature. The load applied to the beam is measured using a load cell during the bending test. Different
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15

Saseendran, Vishnu, and Christian Berggreen. "Mixed-mode fracture evaluation of aerospace grade honeycomb core sandwich specimens using the Double Cantilever Beam–Uneven Bending Moment test method." Journal of Sandwich Structures & Materials 22, no. 4 (2018): 991–1018. http://dx.doi.org/10.1177/1099636218777964.

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Fracture testing of aerospace grade honeycomb core sandwich composites is carried out using the Double Cantilever Beam specimen loaded with Uneven Bending Moments, and a Double Cantilever Beam–Uneven Bending Moment test rig capable of applying pure moments is utilized. Specimens with carbon fiber-reinforced plastic face sheets are employed with a range of honeycomb core grades comprising of Nomex® and Kevlar paper. The sandwich specimens are reinforced with steel doublers to reduce excessive rotation of the face sheets. The mode mixity phase angle pertaining to a particular ratio of moments be
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16

Sadeghian, Pedram, Dimo Hristozov, and Laura Wroblewski. "Experimental and analytical behavior of sandwich composite beams: Comparison of natural and synthetic materials." Journal of Sandwich Structures & Materials 20, no. 3 (2016): 287–307. http://dx.doi.org/10.1177/1099636216649891.

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In this study, the flexural behavior of sandwich composite beams made of fiber-reinforced polymer (FRP) skins and light-weight cores are studied. The focus is on the comparison of natural and synthetic fiber and core materials. Two types of fiber materials, namely glass and flax fibers, as well as two types of core materials, namely polypropylene honeycomb and cork, are considered. A total of 105 small-scale sandwich beam specimens (50 mm wide) were prepared and tested under four-point bending. Test parameters were fiber types (flax and glass fibers), core materials (cork ad honeycomb), skin l
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17

Kirollos, Benjamin William Mounir, Richard Trede, and Peter Lampen. "The experimental static mechanical performance of ironed repaired GFRP–honeycomb sandwich beams." Journal of Sandwich Structures & Materials 14, no. 6 (2012): 694–714. http://dx.doi.org/10.1177/1099636212460538.

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Damaged glass fibre reinforced plastic–honeycomb core sandwich beams are repaired using uncured glass fibre reinforced plastic fabrics and a handheld iron. The effect of iron temperature, application time and pressure on the effectiveness of repair is investigated by measuring the failure load and flexural stiffness of the repaired beams using third span four-point bending tests. Repairs are tested in compression and tension. A repair process is suggested which consistently recovers 95% of the compressive strength and 77% of the tensile strength of the damaged beam. The repair is shown to have
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18

NENCIU, Andrei, Dragos Alexandru APOSTOL, and Dan Mihai CONSTANTINESCU. "Experimental testing in 3-point bending of sandwich beams using additively manufactured loading bars." INCAS BULLETIN 17, no. 1 (2025): 43–52. https://doi.org/10.13111/2066-8201.2025.17.1.4.

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This study investigates the feasibility of custom-made 3D-printed loading bars of a testing machine and compares their performance to that of standard (metal) components through the 3-point bending testing of sandwich beams. Specifically, the study evaluates two types of sandwich beams: honeycomb and re-entrant unit cell topologies. Each type of beam was subjected to three-point bending tests using both standard and 3D-printed loading bars. The experiments indicate that the printed custom-made loading bars used as a testing accessory are a viable alternative. Further research with a larger num
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19

Chantarapanich, Nattapon, Apinya Laohaprapanon, Sirikul Wisutmethangoon, et al. "Fabrication of three-dimensional honeycomb structure for aeronautical applications using selective laser melting: a preliminary investigation." Rapid Prototyping Journal 20, no. 6 (2014): 551–58. http://dx.doi.org/10.1108/rpj-08-2011-0086.

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Purpose – The purpose of this paper was to investigate the feasibility on design and production of a three-dimensional honeycomb based on selective laser melting (SLM) technique for use in aeronautical application. Design/methodology/approach – Various polyhedrons were investigated using their mechanical property, i.e. strain energy density (SED), by means of finite element (FE) analysis for the suitability of use in aerospace application; the highest SED polyhedron was selected as a candidate polyhedron. From the FE analysis, the truncated octahedron (three-dimensional honeycomb) structure wa
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20

Meng, Li Qing, Shi Zhe Chen, Yan Wu, and Xue Feng Shu. "Failure Behaviour of Sandwich Beam Subjected to Projectile Impact." Advanced Materials Research 183-185 (January 2011): 2143–47. http://dx.doi.org/10.4028/www.scientific.net/amr.183-185.2143.

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Aerodynamic gun impact test is carried out to investigate sandwich beam with metallic skin and Nomex honeycomb core damage mechanism and failure behaviour. Details of the deformation and damage progression within the sandwich beam are observed in particular. The comparisons between the two kinds of specimen with different thickness skins clearly show that the difference in the impact energy consumed in global bending deformation and the localized indentation. Theoretical elastic bending stiffness of the sandwich beam with thicker skins is approximately 2.26 times greater than that of sandwich
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21

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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22

Pourriahi, Vahid, Mohammad Heidari-Rarani, and Amir Torabpour Isfahani. "Influence of geometric parameters on free vibration behavior of an aluminum honeycomb core sandwich beam using experimentally validated finite element models." Journal of Sandwich Structures & Materials 24, no. 2 (2021): 1449–69. http://dx.doi.org/10.1177/10996362211053633.

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The hexagonal honeycomb core sandwich panels used in the satellite structure are subjected to severe vibration during launch. Therefore, the amounts of natural frequencies of these panels are of great importance for design engineers. Three-dimensional finite element modeling of the core considering all geometric parameters (i.e., a high-fidelity model) to achieve accurate results is not cost-effective. The honeycomb core is traditionally equivalent to a homogenized continuum core (i.e., a low-fidelity model) using simple analytical relations with ignoring the adhesive layer at the double cell-
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23

Safaei, Babak, Emmanuel Chukwueloka Onyibo, Mehmet Goren, et al. "FREE VIBRATION INVESTIGATION ON RVE OF PROPOSED HONEYCOMB SANDWICH BEAM AND MATERIAL SELECTION OPTIMIZATION." Facta Universitatis, Series: Mechanical Engineering 21, no. 1 (2023): 031. http://dx.doi.org/10.22190/fume220806042s.

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In this paper, free vibration, modal and stress state analyses of honeycomb sandwich structures with different boundary conditions was investigated and major factors affecting the sandwich frequencies and stiffness due to material or parameter changes were determined. The representative volume element (RVE) method used in this work were analytically and numerically validated by comparing the obtained results to those available in literature. Firstly, unit cell method was used to capture the entire effects of different parameters on the free vibration of honeycomb sandwich structure in ANSYS. T
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24

CHEN, LI-MING, MING-JI CHEN, YONG-MAO PEI, YI-HUI ZHANG, and DAI-NING FANG. "OPTIMAL DESIGN OF SANDWICH BEAMS WITH LIGHTWEIGHT CORES IN THREE-POINT BENDING." International Journal of Applied Mechanics 04, no. 03 (2012): 1250033. http://dx.doi.org/10.1142/s1758825112500330.

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Being widely used in engineering, the optimization of sandwich beams to achieve greater stiffness-to-weight ratio is of great research interest. In this paper, the optimization process was carried to obtain minimum weight designs in three-point bending based on prescribed stiffness index. Results indicate that honeycomb-cored sandwich beams possess smaller minimum weight index in comparison with metal foam-cored beams. In addition, failure mechanisms of the optimized designs were also investigated to reveal that the sandwich-cored beams were more prone to face wrinkling than metal foam-cored b
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25

Sharif, Umer, Xinmei Xiang, Miaochang Zhu, et al. "Damping and Stiffness Analysis of Sandwich Beam with 3D-Printed Honeycomb Core Filled with Magnetorheological Elastomer (MRE): An Experimental Approach." Polymers 15, no. 18 (2023): 3807. http://dx.doi.org/10.3390/polym15183807.

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The current study focuses on the production and experimental examination of sandwich beams consisting of an aluminum face sheet and 3D-printed honeycomb cores that are filled with magnetorheological elastomer (MRE). These cores are loaded with different ratios of (75/25)% and (50/50)% elastomer and magnetic particles, measured by weight. In order to ascertain the dynamic characteristics of sandwich beams, the constructed specimens were subjected to classic shock (free vibration) experiments, and these experiments were conducted under two conditions: with and without the application of a changi
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26

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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27

Wang, B., and M. Yang. "Damping of honeycomb sandwich beams." Journal of Materials Processing Technology 105, no. 1-2 (2000): 67–72. http://dx.doi.org/10.1016/s0924-0136(00)00564-1.

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28

He, Wei. "Ultralight micro-perforated sandwich panel with double-layer hierarchical square honeycomb core for broadband sound absorption." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 263, no. 6 (2021): 83–90. http://dx.doi.org/10.3397/in-2021-1129.

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The micro-perforated panel (MPP) has only one sound absorption peak, and the sound absorption performance is poor in the wide frequency range. Besides, the stiffness and strength of MPP are insufficient, so it can not bear the external load. In this study, double layers of hierarchical square honeycomb are placed within the air-back cavity of MPP to produce a sandwich structure. On the one hand, hierarchical honeycombs divide the air-back cavity into several sub-cavities. The perforations on the panel together with the sub-cavities form a series-parallel system of Helmholtz resonators. The sou
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29

Gopalakrishnan, KC, R. Ramesh Kumar, and S. Anil Lal. "Cohesive zone modeling of coupled buckling – Debond growth in metallic honeycomb sandwich structure." Journal of Sandwich Structures & Materials 14, no. 6 (2012): 679–93. http://dx.doi.org/10.1177/1099636212460537.

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Buckling-induced skin–core debond growth in honeycomb sandwich cantilever beam is demonstrated using a cohesive zone model. The input parameters for the analysis are interfacial bond strength, mode I and mode II interfacial fracture toughness values, obtained from flatwise tension tests, drum-peel tests and three-point end notch flexure tests, respectively. Debonded honeycomb specimens are tested and the acoustic emission technique was used to observe the initiation of the debond growth. The load-displacement response from the cohesive zone model model shows a good agreement with the experimen
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30

Saraswathy, B., R. Ramesh Kumar, and Lalu Mangal. "Dynamic Analysis of Honeycomb Sandwich Beam with Multiple Debonds." ISRN Mechanical Engineering 2012 (January 16, 2012): 1–7. http://dx.doi.org/10.5402/2012/826952.

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Analytical formulation for the evaluation of frequency of CFRP sandwich beam with debond, following the split beam theory, generally underestimates the stiffness, as the contact between the honeycomb core and the skin during vibration is not considered in the region of debond. The validation of the present analytical solution for multiple-debond size is established through 3D finite element analysis, wherein geometry of honeycomb core is modeled as it is, with contact element introduced in the debond region. Nonlinear transient analysis is followed by fast Fourier transform analysis to obtain
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31

Xu, Bo Hao, Shuai Wang, Kai Fa Zhou, Wen Yi Ma, and Nan Sun. "Large Torsion Deformation: Centrosymmetric Reentrant Honeycomb." Applied Mechanics and Materials 904 (January 4, 2022): 17–25. http://dx.doi.org/10.4028/www.scientific.net/amm.904.17.

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There exist some problems in the crash box and anti-collision beam sandwich structure, such as monotone deformation pattern and uneconomical energy absorption performance. In order to raise the deformation capacity and energy absorption performance of sandwich structure, centrosymmetric reentrant honeycomb (CRH) and hexagonal centrosymmetric reentrant honeycomb (HCRH) are proposed based on auxetic reentrant honeycomb (ARH) in this work. Based on HCRH, four kinds of transverse combination structures and two kinds of longitudinal combination structures are obtained. The results of specific energ
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32

Cheng, Shi, Pizhong Qiao, Fangliang Chen, Wei Fan, and Zhende Zhu. "Free vibration analysis of fiber-reinforced polymer honeycomb sandwich beams with a refined sandwich beam theory." Journal of Sandwich Structures & Materials 18, no. 2 (2015): 242–60. http://dx.doi.org/10.1177/1099636215619841.

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33

Silva, Hugo Miguel, and José Filipe Bizarro de Meireles. "Effective Mechanical Behavior of Sandwich Beams under Uncoupled Bending and Torsion Loadings." Applied Mechanics and Materials 590 (June 2014): 58–62. http://dx.doi.org/10.4028/www.scientific.net/amm.590.58.

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Sandwich geometries, mainly panels and beams are widely used in several transportation industries, namely aerospace, aeronautic and automotive. Sandwich geometries are known for their advantages in structural applications: high specific stiffness, low weight, and possibility of design optimization prior to manufacturing. This study aims to know the influence of the number of reinforcements (ribs), and of the thickness on the mechanical behavior of sandwich panels subjected to bending and torsion loads separately. In this study, 3 geometries are compared: simple web-core beam, corrugated core,
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34

Modabberifar, Mehdi, Milad Roudi, and Ehsan Soury. "Analiza statystyczna wyników numerycznej analizy parametrów konstrukcyjnych płyt<br />z kompozytów FRP z wypełnieniem o strukturze plastra miodu pod obciążeniem momentem skręcającym." Roads and Bridges - Drogi i Mosty 15, no. 2 (2016): 103–15. http://dx.doi.org/10.7409/rabdim.016.007.

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In recent years, honeycomb fiber reinforced plastic (FRP) sandwich panels have been increasingly used in various industries. The objective of this study is to conduct a combined numerical-statistical investigation of honeycomb FRP sandwich beams subject to torsion load. In this paper, the effect of geometric parameters of sandwich panel on maximum shear strain in both face and core and angle of torsion in a honeycomb FRP sandwich structures in torsion is investigated. Effects of parameters including core thickness, face skin thickness, cell shape, cell size, and cell thickness on mechanical be
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35

Yang, Ran, Dayi Qu, and Jigang Zhang. "Experimental Study on the Impact Resistance Performance of Civil Air Defense RC Walls Protected by Honeycomb Sandwich Panels." Buildings 14, no. 8 (2024): 2293. http://dx.doi.org/10.3390/buildings14082293.

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Reinforced concrete (RC) walls are extensively used in civil air defense engineering and are susceptible to low-speed impacts with high energy and massive weight during service. Therefore, it is crucial to consider the impact resistance of these walls and explore effective protection methods. The honeycomb structure, known for its energy-absorbing properties, has been widely utilized in aerospace, automotive, and maritime industries. However, there is a need for more research on applying honeycomb structures in energy-absorbing protection devices in civil engineering. This study proposes the u
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36

Subramani, Mageshwaran, Ananda Babu Arumugam, and Manoharan Ramamoorthy. "Vibration Analysis of Carbon Fiber Reinforced Laminated Composite Skin with Glass Honeycomb Sandwich Beam Using HSDT." Periodica Polytechnica Mechanical Engineering 61, no. 3 (2017): 213. http://dx.doi.org/10.3311/ppme.9747.

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In this paper, the vibration analysis of uniform laminated composite sandwich beam with a viscoelastic core was studied. The governing equation of motion of the laminated composite sandwich beam has been derived based on higher order shear deformation theory (HSDT) in finite element model (FEM). The developed finite element model has been validated in terms of natural frequencies with the experimental values and the available literature. Various parametric studies have been performed to examine the impact of the core thickness, ply orientation and aspect ratio of the uniform laminated composit
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37

Sadiq, Sadiq E., Muhsin J. Jweeg, and Sadeq H. Bakhy. "Strength Analysis of an Aircraft Sandwich Structure with a Honeycomb Core: Theoretical and Experimental Approaches." Engineering and Technology Journal 39, no. 1A (2021): 153–66. http://dx.doi.org/10.30684/etj.v39i1a.1722.

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In this paper, the strength of aircraft sandwich structure with honeycomb core under bending load was evaluated theoretically and experimentally based on failure mode maps. A failure mode map for the loading under three-point bending was constructed theoretically to specify the failure modes and corresponding load. Three point bending test for aluminum honeycomb sandwich beam has been achieved to measure the peak load and maximum deflection. The obtained results elucidated a good agreement between the theoretical solutions and experimental tests, where the error ratio was not exceeded 12%. The
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38

Zhu, Xiujie, Chao Xiong, Junhui Yin, Dejun Yin, and Huiyong Deng. "Transverse Bending and Axial Compressing Mechanical Characteristics of Carbon Fiber Reinforced Plastic Sandwich Laminated Square Tubes." Science of Advanced Materials 12, no. 9 (2020): 1289–99. http://dx.doi.org/10.1166/sam.2020.3765.

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The transverse bending and axial compressing mechanical properties of carbon fiber reinforced plastic (CFRP) sandwich laminated square tubes with two kinds of cores, aluminum honeycomb and aluminum foam, respectively, were studied. The failure mechanism and damage processes of the two different CFRP sandwich laminated square tubes were studied by three-point bending and axial compressing experiments, comparing to CFRP hollow laminated square tube. The three-point bending process of CFRP sandwich laminated square tubes were also simulated in ABAQUS/Explicit and the failure mechanism and modes w
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39

Ijaz, Hassan, Waqas Saleem, Muhammad Zain-ul-Abdein, Tarek Mabrouki, Saeed Rubaiee, and Abdullah Salmeen Bin Mahfouz. "Finite Element Analysis of Bend Test of Sandwich Structures Using Strain Energy Based Homogenization Method." Advances in Materials Science and Engineering 2017 (2017): 1–10. http://dx.doi.org/10.1155/2017/8670207.

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The purpose of this article is to present a simplified methodology for analysis of sandwich structures using the homogenization method. This methodology is based upon the strain energy criterion. Normally, sandwich structures are composed of hexagonal core and face sheets and a complete and complex hexagonal core is modeled for finite element (FE) structural analysis. In the present work, the hexagonal core is replaced by a simple equivalent volume for FE analysis. The properties of an equivalent volume were calculated by taking a single representative cell for the entire core structure and th
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40

Belingardi, G., P. Martella, and L. Peroni. "Fatigue analysis of honeycomb-composite sandwich beams." Composites Part A: Applied Science and Manufacturing 38, no. 4 (2007): 1183–91. http://dx.doi.org/10.1016/j.compositesa.2006.06.007.

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41

Chenini, I., R. Nasri, C. Mrad, and Y. Abdelli. "Kinematics effect on honeycomb sandwich beams vibration." Mechanics & Industry 18, no. 3 (2017): 302. http://dx.doi.org/10.1051/meca/2016039.

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42

Zaoutsos, S. P. "Mechanical response and strength characteristics of aluminum honeycomb sandwich panels for infrastructure engineering." IOP Conference Series: Materials Science and Engineering 1201, no. 1 (2021): 012046. http://dx.doi.org/10.1088/1757-899x/1201/1/012046.

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Abstract The use of aluminium sandwich panels has been increased in a certain number of engineering applications from infrastructure systems and transportation to aircraft and naval engineering. Due to their structural efficiency these materials are ideal for applications where ratio of strength to weight is of crucial importance. In the current study the investigation of the strength characteristics of aluminium sandwich panels with aluminium honeycomb core and different types of skins is performed using both analytical models and experimental procedures. A series of strength tests such as te
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Selvam, Vignesh, Vijay Shankar Sridharan, and Sridhar Idapalapati. "Static and Fatigue Debond Resistance between the Composite Facesheet and Al Cores under Mode-1 in Sandwich Beams." Journal of Composites Science 6, no. 2 (2022): 51. http://dx.doi.org/10.3390/jcs6020051.

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The debonding toughness between unidirectional glass fiber reinforced polymer face sheets and cellularic cores of sandwich structures is experimentally measured under static and fatigue loading conditions. The effect of various core geometries, such as regular honeycomb and closed-cell foams of two relative densities on the adhesive interfacial toughness is explored using the single cantilever beam (SCB) testing method. The steady-state crack growth measurements are used to plot the Paris curves. The uniformity of adhesive filleting and the crack path was found to affect the interfacial toughn
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44

Bareille, O., and M. N. Ichchou. "Wave propagation in composite structures." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 225, no. 3 (2009): 639–48. http://dx.doi.org/10.1243/09544062jmes1971.

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Dynamic behaviour of honeycomb-core composite structures forms the framework of this article. The wave numbers of propagative waves are the elements of comparison between a numerical method (wave finite-element method) and an experimental identification technique (inhomogeneous wave correlation). The numerical method is based on the description of the dynamics of periodic waveguides. The experimental technique uses a matching criterion with the measured displacement field to obtain the corresponding wave numbers for a wave-based description of the displacement. Both approaches are applied to a
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45

Kardomateas, G. A. "Wrinkling of Wide Sandwich Panels∕Beams With Orthotropic Phases by an Elasticity Approach." Journal of Applied Mechanics 72, no. 6 (2004): 818–25. http://dx.doi.org/10.1115/1.1978919.

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There exist many formulas for the critical compression of sandwich plates, each based on a specific set of assumptions and a specific plate or beam model. It is not easy to determine the accuracy and range of validity of these rather simple formulas unless an elasticity solution exists. In this paper, we present an elasticity solution to the problem of buckling of sandwich beams or wide sandwich panels subjected to axially compressive loading (along the short side). The emphasis on this study is on the wrinkling (multi-wave) mode. The sandwich section is symmetric and all constituent phases, i
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46

Kumar, Sathish, Leping Feng, and Ulf Orrenius. "Predicting the Sound Transmission Loss of Honeycomb Panels using the Wave Propagation Approach." Acta Acustica united with Acustica 97, no. 5 (2011): 869–76. http://dx.doi.org/10.3813/aaa.918466.

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The sound transmission properties of sandwich panels can be predicted with sufficient degree of accuracy by calculating the wave propagation properties of the structure. This method works well for sandwich panels with isotropic cores but applications to panels with anisotropic cores are hard to find. Honeycomb is an example of anisotropic material which when used as a core, results in a sandwich panel with anisotropic properties. In this paper, honeycomb panels are treated as being orthotropic and the wavenumbers are calculated for the two principle directions. These calculated wavenumbers are
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47

Chen, Shuai, Hao Xu, and Zhanjun Wu. "Digital twin method for predicting the critical load of debonding damage in honeycomb sandwich structures based on distributed optical fiber sensor and Dynamic Bayesian Network." Journal of Physics: Conference Series 2819, no. 1 (2024): 012042. http://dx.doi.org/10.1088/1742-6596/2819/1/012042.

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Abstract During the service life of aerospace vehicles, harsh environmental conditions such as vibrations and impacts can easily lead to the partial debonding of honeycomb sandwich structures. Distributed optical fiber sensors (DOFS) based on backscattered Rayleigh scattering are widely used in the field of structural health monitoring due to their advantages of easy embedding and high anti-interference capabilities. How to timely detect debonding damage and predict the structure’s critical safety load to ensure the safety of the vehicle’s structure has always been a concern for researchers. T
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48

Shahdin, Amir, Joseph Morlier, Laurent Mezeix, Christophe Bouvet, and Yves Gourinat. "Evaluation of the Impact Resistance of Various Composite Sandwich Beams by Vibration Tests." Shock and Vibration 18, no. 6 (2011): 789–805. http://dx.doi.org/10.1155/2011/259295.

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Impact resistance of different types of composite sandwich beams is evaluated by studying vibration response changes (natural frequency and damping ratio). This experimental works will help aerospace structural engineer in assess structural integrity using classification of impact resistance of various composite sandwich beams (entangled carbon and glass fibers, honeycomb and foam cores). Low velocity impacts are done below the barely visible impact damage (BVID) limit in order to detect damage by vibration testing that is hardly visible on the surface. Experimental tests are done using both b
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Smardzewski, Jerzy. "Elastic properties of cellular wood panels with hexagonal and auxetic cores." Holzforschung 67, no. 1 (2013): 87–92. http://dx.doi.org/10.1515/hf-2012-0055.

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Abstract Light cellular wood panels have been gaining increasing interest among furniture manufacturers, but only a few articles can be found dealing with modeling of mechanical properties of cellular wood panels with a paper honeycomb core inside. The present paper intends to fill this gap, and thus, the elastic properties of cellular wood panels with paper honeycomb of hexagonal and auxetic cells were evaluated. Analytical models have been employed by comparison of experimental data with those obtained by numerical calculations. The cores of the examined cellular wood panels exhibited strong
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Sun, Wei, Junyi Xiao, Xuanwei Hu, et al. "Study on Bearing Capacity of Honeycomb Sandwich Structure Embedded Parts." Journal of Composites Science 7, no. 7 (2023): 281. http://dx.doi.org/10.3390/jcs7070281.

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In the composite structure of spacecraft, the honeycomb sandwich structure is the basic bearing component used to bear and transmit loads. To explore the influencing factors on the bearing capacity of honeycomb sandwich structures, this study combines local tests and speckle measurement systems to conduct tensile tests on 10 test specimens with different parameters. Firstly, a comprehensive assessment was conducted on the accuracy of the loading and measurement system, the rationality of the testing method, and the mechanical properties of the test piece. It was found that the maximum measurem
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