Relevant bibliographies by topics / Honeycomb structure

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Honeycomb structure'

Author: Grafiati
Published: 4 June 2021
Last updated: 21 February 2023

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Journal articles on the topic "Honeycomb structure"

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Wan Abdul Hamid, Wan Luqman Hakim, Yulfian Aminanda, and Mohamed Shaik Dawood. "Experimental Investigation on the Energy Absorption Capability of Foam-Filled Nomex Honeycomb Structure." Applied Mechanics and Materials 393 (September 2013): 460–66. http://dx.doi.org/10.4028/www.scientific.net/amm.393.460.

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The effect of low density filler material comprising polyurethane foam on the axial crushing resistance of Nomex honeycomb under quasi-static compression conditions was analyzed. Honeycombs with two different densities, two different heights and similar cell size, along with five different densities of polyurethane foams were used in the research. A total of 14 unfilled Nomex honeycombs, 15 polyurethane foams, and 39 foam-filled Nomex honeycombs were subjected to quasi-static compression loading. The crushing load and capability of foam-filled Nomex honeycomb structure in absorbing the energy were found to increase significantly since the cell walls of honeycomb were strengthened by the foam filler; the walls did not buckle at the very beginning of compression loading. The failure mechanism of the foam-filled honeycomb was analyzed and compared with the unfilled honeycomb.
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Du, Jianxun, and Peng Hao. "Investigation on Microstructure of Beetle Elytra and Energy Absorption Properties of Bio-Inspired Honeycomb Thin-Walled Structure under Axial Dynamic Crushing." Nanomaterials 8, no. 9 (August 27, 2018): 667. http://dx.doi.org/10.3390/nano8090667.

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The beetle elytra requires not only to be lightweight to make a beetle fly easily, but also to protect its body and hind-wing from outside damage. The honeycomb sandwich structure in the beetle elytra make it meet the above requirements. In the present work, the microstructures of beetle elytra, including biology layers and thin-walled honeycombs, are observed by scanning electron microscope and discussed. A new bionic honeycomb structure (BHS) with a different hierarchy order of filling cellular structure is established. inspired by elytra internal structure. Then the energy absorbed ability of different bionic models with the different filling cell size are compared by using nonlinear finite element software LS-DYNA (Livermore Software Technology Corp., Livermore, CA, USA). Numerical results show that the absorbed energy of bionic honeycomb structures is increased obviously with the increase of the filling cell size. The findings indicate that the bionic honeycomb structure with second order has an obviously improvement over conventional structures filled with honeycombs and shows great potential for novel clean energy absorption equipment.
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Spratt, Myranda, Sudharshan Anandan, Rafid Hussein, Joseph W. Newkirk, K. Chandrashekhara, Misak Heath, and Michael Walker. "Build accuracy and compression properties of additively manufactured 304L honeycombs." Rapid Prototyping Journal 26, no. 6 (April 3, 2020): 1049–57. http://dx.doi.org/10.1108/rpj-08-2018-0201.

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Purpose The purpose of this study is to analyze the build quality and compression properties of thin-walled 304L honeycomb structures manufactured by selective laser melting. Four honeycomb wall thicknesses, from 0.2 to 0.5 mm, were built and analyzed. Design/methodology/approach The density of the honeycombs was changed by increasing the wall thickness of each sample. The honeycombs were tested under compression. Differences between the computer-assisted design model and the as-built structure were quantified by measuring physical dimensions. The microstructure was evaluated by optical microscopy, density measurements and microhardness. Findings The Vickers hardness of the honeycomb structures was 209 ± 14 at 50 g load. The compression ultimate and yield strength of the honeycomb material were shown to increase as the wall thickness of the honeycomb samples increased. The specific ultimate strength also increased with wall thickness, while the specific yield stress of the honeycomb remained stable at 42 ± 2.7 MPa/g/cm3. The specific ultimate strength minimized near 0.45 mm wall thickness at 82 ± 5 MPa/g/cm3 and increased to 134 ± 3 MPa/g/cm3 at 0.6 mm wall thickness. Originality/value This study highlights a single lightweight metal structure, the honeycomb, built by additive manufacturing (AM). The honeycomb is an interesting structure because it is a well-known building material in the lightweight structural composites field but is still considered a relatively complex geometric shape to fabricate. As shown here, AM techniques can be used to make complex geometric shapes with strong materials to increase the design flexibility of the lightweight structural component industry.
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Wang, Yan, P. Xue, and J. P. Wang. "Comparing Study of Energy-Absorbing Behavior for Honeycomb Structures." Key Engineering Materials 462-463 (January 2011): 13–17. http://dx.doi.org/10.4028/www.scientific.net/kem.462-463.13.

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Honeycomb materials，as a type of ultra-light multifunctional material，have been examined extensively in recent years and have been applied in many fields. This study investigated the energy absorption capacity and their mechanisms of honeycomb structures with five different cell geometry (square，triangular，circular, hexagonal，kagome). It has been shown that the honeycomb structure with kagome cells is the best choice under the targets of the energy absorption capacity, peak force and plateau stress, when relative density and cell wall thickness of the five kinds of honeycombs are the same. Besides, honeycomb with hexagonal cells and honeycomb with triangular cells are also ideal structures for energy absorption purpose.
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Shirbhate, P. A., and M. D. Goel. "Effect of Reinforcement in Energy Absorption Characteristics of Honeycomb Structures Under Blast Loading." Proceedings of the 12th Structural Engineering Convention, SEC 2022: Themes 1-2 1, no. 1 (December 19, 2022): 1231–35. http://dx.doi.org/10.38208/acp.v1.645.

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During recent decades demand for cellular structures has increased due to raised concern for protection of important buildings and components from blast loads. These types of cellular materials possess important features that includes less weight, higher energy absorption capabilities, higher strength to weight ratio in comparison with monolithic counterpart. Cellular material includes honeycomb, corrugated, web type structure, open and closed cell metal foam etc. However, in the present investigation, honeycomb sandwich panel are rein forced and are analysed for blast response mitigation. Further, obtained response of reinforced honeycomb structure is compared with the conventional honeycomb sandwich panel on the basis of mass. The Finite Element (FE) software LS-DYNA®, commonly used for dynamic explicit analysis, is used for numerical simulation and blast response investigation. Total three different reinforced configurations are developed and compared with conventional honeycomb i.e. honeycomb without any reinforcement. From FE analysis, it is noticed that reinforcing the honeycomb structure enhances the energy absorption capabilities significantly due to reinforcement which in turns increases the density of honeycombs.
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Zhu, Cheng Yan, Jia Ying Sun, Yan Qing Li, Wei Tian, and Qian Qian Luo. "Design of 3D Integrated Structure with Vertical Honeycombed-Core." Advanced Materials Research 332-334 (September 2011): 985–88. http://dx.doi.org/10.4028/www.scientific.net/amr.332-334.985.

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In order to study the influences of fabric specification on vertical depth of honeycomb weaves, 11 kinds of honeycomb weaves fabric were designed in this paper by using different yarn linear density and weave repeat unit. The results show that the vertical depth of honeycomb weaves would increase as the yarn linear density increasing when the linear density was comparatively larger. With the increasing of weave repeat unit, vertical depth of honeycomb weaves is significantly increased. According to these results, 3D integrated vertical structure with honeycombed-core was designed, which used honeycomb weaves as the sandwich structure and plain weaves as the upside face and underside face. At the same time, the looming draft of this structure was drawn.
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Kondratiev, Andrii, Oksana Prontsevych, and Tetyana Nabokina. "Analysis of the Bearing Capacity of Adhesive Joint of Honeycomb Cores of Sandwich Structures with the Continuous Adhesive Layer." Key Engineering Materials 864 (September 2020): 228–40. http://dx.doi.org/10.4028/www.scientific.net/kem.864.228.

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Adhesive sandwich structures with the honeycomb core of the metallic foil, polymeric papers and composites are widely and effectively used in the units of aerospace engineering and in the other industries owing to a number of undeniable advantages, including high specific strength and stiffness. In the process of designing and manufacturing of abovementioned structures, it is necessary to ensure high strength and reliability of the adhesive joint of the bearing skins and honeycomb core at a small area of their contact. The decisive factors influencing the bearing capacity of such joint are the technological parameters of the bonding process. Using the finite element modeling, the paper deals with the bearing capacity of the adhesive joint of bearing skins with the honeycomb core based on the aluminium foil and polymeric paper Nomex at transversal tearing for the key factors of the bonding process. The pattern of the adhesive joint failure (on the adhesive of honeycombs) has been revealed, depending on the depth of penetration of honeycombs ends in the adhesive, physical and mechanical characteristics of honeycombs, modulus of elasticity and tearing strength of the adhesive and thickness of the adhesive layer. Peculiar features of behavior of adhesive joints of the bearing skins with the honeycomb core based on the aluminium foil and polymeric paper Nomex under the load have been established, which should be taken into account in designing and manufacturing of honeycomb structures. The recommendations are given with regard to choosing of parameters of the process of honeycomb structure bonding, which allow providing with the acceptable accuracy the optimal depth of penetration of ends of the honeycomb core faces in the adhesive layer of specified depth.
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Yalçın, Bekir, Berkay Ergene, and Uçan Karakılınç. "Modal and Stress Analysis of Cellular Structures Produced with Additive Manufacturing by Finite Element Analysis (FEA)." Academic Perspective Procedia 1, no. 1 (November 9, 2018): 263–72. http://dx.doi.org/10.33793/acperpro.01.01.52.

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Cellular structures such as regular/irregular honeycombs and re-entrants are known as lighter, high level flexibility and more efficient materials; these cellular structures have been mainly designed with topology optimization and obtained with new additive manufacturing methods for aircraft industry, automotive, medical, sports and leisure sectors. For this aim, the effect of cellular structures such as the honeycomb and re-entrant on vibration and stress-strain behaviors were determined under compression and vibration condition by finite elements analyses (FEA). In FEA, the re-entrant and honeycomb structures were modeled firstly and then the stress and displacement values for each structure were obtained. Secondly, vibration behaviors of these foam structures were estimated under determined boundary conditions. In conclusion, the effect of topology in foam structures on vibration and mechanical behaviour were exhibited in FEA results. The obtained stress results of FEA show that all stresses (?x, ?y, ?vm, ?xy) are lower on honeycomb structure than reentrant structure. Besides, natural frequency values (?1, ?2, ?3) and appearance of each structure were observed by using FEA.
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Zhu, Xuefeng, Longkun Xu, Xiaochen Liu, Jinting Xu, Ping Hu, and Zheng-Dong Ma. "Theoretical prediction of mechanical properties of 3D printed Kagome honeycombs and its experimental evaluation." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 233, no. 18 (July 16, 2019): 6559–76. http://dx.doi.org/10.1177/0954406219860538.

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Kagome honeycomb structure is proved to incorporate excellent mechanical and actuation performances due to its special configuration. However, until now, the mechanical properties of 3D printed Kagome honeycomb have not been investigated. Hence, the objective of this work is to explore some mechanical properties of 3D-printed Kagome honeycomb structures such as elastic properties, buckling, and so on. In this paper, the analytical formulas of some mechanical properties of Kagome honeycombs made of 3D-printed materials are given. Effective elastic moduli such as Young's modulus, shear modulus, and Poisson's ratio of orthotropic Kagome honeycombs under in-plane compression and shear are derived in analytical forms. By these formulas, we investigate the relationship of the elastic moduli, the relative density, and the shape anisotropy–ratio of 3D-printed Kagome honeycomb. By the uniaxial tensile testing, the effective Young's moduli of 3D printed materials in the lateral and longitudinal directions are obtained. Then, by the analytical formulas and the experimental results, we can predict the maximum Young's moduli and the maximum shear modulus of 3D-printed Kagome honeycombs. The isotropic behavior of 3D-printed Kagome honeycombs is investigated. We also derived the equations of the initial yield strength surfaces and the buckling surfaces. We found that the sizes of the buckling surfaces of 3D printed material are smaller than that of isotropic material. The efficiency of the presented analytical formulas is verified through the tensile testing of 3D printed Kagome honeycomb specimens.
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Zhang, Qian, Wenwang Wu, and Jianlin Liu. "Local Strengthening Design and Compressive Behavior Study of the Triangular Honeycomb Structure." Metals 12, no. 11 (October 22, 2022): 1779. http://dx.doi.org/10.3390/met12111779.

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Additive manufacturing (AM) enables diversity in honeycomb structure configuration, which benefits optimization of the honeycomb structure. In the present study, we proposed two locally enhanced triangular honeycomb structures to improve in-plane compressive performance by avoiding diagonal fracture band. The compressive behaviors and failure mechanism of the original and enhanced triangular honeycomb structures made of 316L steel were studied by experiments and numerical simulations. The results show that the cell-enhanced triangular honeycomb structure and wall-enhanced triangular honeycomb structure possess significantly improved stiffness and peak load compared with the original structure. The fracture band along the diagonal direction of the triangular honeycomb structure is caused by buckling of the cell wall, which is related to its topologic structure. Stress distribution is an essential index reflecting the performance of a honeycomb structure. Uniform stress distribution makes the honeycomb structure fail layer by layer, and it can improve the peak load of the honeycomb structure. Defects such as unmelted metal particles and voids caused by AM processing weaken the strength and plasticity, and the resulting brittleness makes the honeycomb structure fall into pieces.
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Dissertations / Theses on the topic "Honeycomb structure"

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Arceneaux, Donald J. "A 3D Printed Polycaprolactone Honeycomb Structure." Thesis, University of Louisiana at Lafayette, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10640968.

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The application of sophisticated geometric structures within future host materials for increasing energy absorption and compression strength, while being fabricated from crack-healing materials, is of high interest for many functions. Raw feedstock extrusion and three-dimensional printing (3DP) technology were used to develop precise honeycomb structures through intricate deposition of polycaprolactone (PCL) filament. For standardization purposes during 3D model slicing and print quality consistency, constant wall thickness was used for honeycomb structure fabrication, manipulating only the cellular width to obtain variation of cell size to wall thickness ratios.

The honeycomb structures’ compression behaviors were studied through use of in-plane quasi-static uniaxial compression testing. Multiple cycles of compression loading were applied to the specimens in both transverse and ribbon directions at temperatures of 5 °C, room temperature (i.e. 22 °C), and 40 °C at a speed of 1.27 mm/min (0.05 in/min) per ASTM D6641. The energy absorption efficiencies of the honeycomb structure were calculated based on the compression strengths and behaviors displayed, which were then used to obtain the stepping upward stress theoretically. Using the specified stepping upward stresses, the energy absorption capabilities were found in both the transverse and ribbon directions at different temperatures per unit volume. The ability for “shape recovery” of the structures after each loading cycle was also calculated.

Outcomes from this research displayed exceptional recovery of PCL honeycomb structures after repeated compression loading cycles. Samples with relative density of 0.20 absorbed energies of up to 0.99 J/cm3. Upon removing compression loads, samples were capable of shape recovery up to 80% after the first deformation and up to 72% after the fifth deformation. When PCL honeycomb structures are used to reinforce host materials, they increase energy absorption capabilities while being capable of crack-healing functions with remarkable compressive strength. These properties make PCL advantageous for many industries.

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Storozhenko, V. A., A. V. Myagkiy, and R. P. Orel. "Filtering of interference of inhomogeneous regular structure in thermal non-destructive control of cellular structures." Thesis, Eskisehir technical university, 2021. https://openarchive.nure.ua/handle/document/18954.

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Honeycomb constructions are the most widely used materials in contemporary aviation and space technology. They are the basis for the housings of practically all products of this sector, where reliability of all parts should meet the in-creased requirements. Special attention is paid to the quality of composite materials and to the absence of defects such as the places of adhesion failure (exfoliation) between the skin and the honeycomb filler. Therefore, increase in the efficiency and reliability of thermal flaw detection, based on in-depth analysis of the processes of detecting defects and development of the principles of optimization of both the procedure of control and subsequent processing of the obtained information, is an important and relevant task.
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Stout, Sean Dakota. "DESIGN AND CHARACTERIZATION OF INTERMEDIATE TEMPERATURE SOLD OXIDE FUEL CELLS WITH A HONEYCOMB STRUCTURE; OPERATION, RESEARCH, AND OPPORTUNITIES." OpenSIUC, 2015. https://opensiuc.lib.siu.edu/theses/1740.

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The aim of this thesis is to propose the design process and considerations to be employed in the fabrication of a high-volumetric-power-density intermediate temperature solid oxide fuel cell (IT-SOFC), as well as the necessary characterization and analysis techniques for such a device. A novel hexagonal honeycomb design will be proposed with functionally graded electrodes and an alternative electrolyte – a previously unexplored configuration based on attained research. The potential use of CFD software to investigate mass and heat transport properties of an SOFC having such a design shall be discussed, as well as the utility of experimental methods such as the generation of a polarization curve and the use of SEM to characterize electrochemical performance and microstructure, respectively. Fabrication methods shall also be evaluated, and it will be shown that the proposed design is not only feasible but meets the goal of designing an SOFC with a power density of 2 W/cm3 operating at or below 650 C.
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Dove-Jay, Ashley. "Development, integration and testing of a 0-v honeycomb structure for aircraft morphing." Thesis, University of Bristol, 2015. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.690034.

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This thesis lays out the development, analysis, integration and testing of a camber morphing concept for control surfaces dealing with fluidic dynamics, with specific focus on replacing the outboard aileron of fixed-wing aircraft in an effort to increase associated fuel efficiency. Core to the development of the morphing concept was a zero Poisson's ratio (O-v) honeycomb. The state-of-the-art was studied, modified for compatibility with the application intended, was subjected to topological optimization to improve relevant performance charactelistics, and was validated through experimental studies. Mass was reduced by 20% and energy for morphing by 42-55% without affecting load-carrying capability; but fatigue life was reduced by 18%. A near-term performance study was conducted. The outboard aileron of a state-of-the-art A320 wing was replaced with the morphing equivalent, demonstrating higher efficiency and increasing aircraft range by 0.8-0.9% depending on weather conditions in a medium fidelity flight simulation (Heathrow to Amsterdam). A first-iteration long-term study, unrestricted by current design constraints, indicated a significant increase in aerodynamic efficiency; towards 50% for high control surface deflections. Coupled to a pre-stressed hyper-elastic surface skin and an an-ay of micro-linear actuators for morphing, the O-u honeycomb was integrated into a 1.05m span wing for wind-tunnel testing. The generated morphed shapes successfully met the overarching geometric objectives; significant reduction in chordwise and spanwise geometric discontinuities and pressure gradients. Comparison between FE and hammer-testing showed modal frequencies agreed with an average en-or of 8%. Comparison between CFD and wind-tunnel studies showed CL agreement with an average error of 0.07 CL. A methodology for whole wing conformal shape optimisation, based on modified Class Shape Transformations and Bemstein Polynomials, enabled by integration of the O-u honeycomb structure generated coupled to cellular micro-linear actuators, was developed and proposed as a logical step forward to explore the full potential of the morphing system proposed.
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Berkowitz, Charles Kyle. "Characterization of the debonding of graphite/epoxy-nomex honey comb sandwich structure." Thesis, Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/18188.

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Gong, Xiaozhou. "Investigation of different geometric structure parameter for honeycomb textile composites on their mechanical performance." Thesis, University of Manchester, 2011. https://www.research.manchester.ac.uk/portal/en/theses/investigation-of-different-geometric-structure-parameter-for-honeycomb-textile-composites-on-their-mechanical-performance(500d9a32-6c18-4df6-9e5b-40ccdda4c6b3).html.

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Textile honeycomb composites, with an array of hexagonal cells in the cross section, is a type of textile composites having the advantage of being light weight and energy absorbent over the solid composite materials. The aim of this research is to investigate the influence of the geometric parameters on textile honeycomb composites on their mechanical performances under low velocity impact, which can be used to help designer control over the textile honeycomb composites. Four groups of textile honeycomb composites, involving 14 varieties, have been systematically created for the experimental analysis. The geometric parameters of the honeycomb composites, including the cell opening angle, cell size, cell wall length ratio and structural parameters such as composite thickness, composite volume density are studied for their influence on the honeycomb composites under low-velocity impact. Followed by experimental work, honeycomb composites with 12 varieties are modelled by finite element method (FEM) to further investigate the honeycomb structure performance under various loading conditions including different impact energy (6J, 8.3J and 10J) and impactor shape (cylindrical and spherical). The 3D honeycomb fabrics are successfully manufactured and converted into textile honeycomb composites. It was found through the experimental and finite element analysis (FEA) that changes in geometric and structural parameters of the textile honeycomb composites have noted influences on the energy absorption, force attenuation and damage process of the structure. The length ratio of cell wall and the cell opening angle are the most effective parameters for controlling the energy absorption of the composites and composites with medium cell sizes tend to have more reliable mechanical performances under various loading conditions. And it is also found in FEA that cylindrical impacts are more threatening to human beings than the ball shaped impact. The methodology has been established by using FEM to investigate the composites more systematically in the current study. This helps to provide a faster and economic design cycle for the honeycomb composites, which can substantially decrease the time to take products from concept to the production.
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Gandy, Helene Tchoutouo Ndjountche. "Adhesiveless honeycomb sandwich structure with carbon graphite prepreg for primary structural application: a comparative study to the use of adhesive film." Thesis, Wichita State University, 2012. http://hdl.handle.net/10057/5388.

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In the past two decades, researchers have been developing prepreg materials with matrix properties that can allow the elimination of the additional adhesive traditionally used between the core and the skins of composite sandwich structures. There have been several publications on self-adhesive prepreg used for sandwich structures; but none with a comparative study for primary structural application, from the same fabrication basis. This research focused on the properties of adhesiveless honeycomb sandwich structure with carbon graphite prepreg, while assessing the structure with adhesive film at the skin-to-core interface simultaneously. In the study, laminate and honeycomb sandwich panels were fabricated and tested with consistent lay-up, curing, and testing processes, all fully documented. Sandwich panels were made with the CYCOM 977-2 prepreg system from Cytec and the AF191 adhesive film from 3M, while the adhesiveless sandwich panel had the MTM45-1 prepreg systems from Advanced Composites Group (ACG). Laminate panels were also fabricated using the two different prepregs. Specimens from the panels where tested for physical and mechanical properties, as well as moisture absorption performance. The results obtained from the non-destructive testing and the experiments confirmed that the self-adhesive prepreg physical properties met the components and void content recommendations for use in primary structures. In addition to analysis of existing published data, mechanical tests were performed in room, hot and cold temperatures, as well as dry and wet conditions. The results suggested that aramid honeycomb sandwich structure with self-adhesive carbon graphite prepreg systems, alongside similar structure using additional adhesive, demonstrates the ability to be used for primary structure.
Thesis (M.S.)--Wichita State University, College of Engineering, Dept. of Mechanical Engineering
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Buzys, Matas, and Sara Nilsson. "Development of a new test methodology for car-to-truck crash." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-262654.

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Till följ av de stora skadorna som riskeras vid frontalkollision mellan personbil och lastbil, utför Scania CV AB kraschtester för att bättre kunna utveckla komponenter med syfte att skydda passagerarna i personbilen. Den typ av test som denna studie bygger på utvärderar den s.k. FUP:en (engelska Front Underrun Protection). I dagsläget görs ett fullskaligt test, där en personbil avfyras in i en lastbil. Syftet med studien är att undersöka möjligheten att utveckla en förenklad test metod där endast de väsentliga komponenterna från lastbilen inkluderas, och en representativ struktur ersätter personbilen. Om möjligt kommer detta minska kostnaderna samt möjliggöra för större repeterbarhet. Tester och utvärderingar görs med hjälp av simulationer i LS-Dyna, ANSA & META, och designkoncept visualiseras i CAD-programmet CATIA V5. Resultat visar att det finns goda förutsättningar för att ersätta personbilen med en barriär av honeycomb struktur samt att lastbilen kan ersättas med en vagn där de väsentliga komponenterna fäst. Diskussioner kring simuleringarna och designen lyfter fram faktorer som visar på goda utvecklingsmöjligheter, men med betoning på det fortsatta arbetet som krävs.
Scania CV AB are developing components to prevent fatal damages during frontal collisions with passenger cars. Therefore, they need to test their assemblies and specifically FUP (Frontal Underrun Protection). Currently, a full-scale test is done in which a passenger car is launched into a truck. The purpose of this study is to examine and develop the possibility of having a simplified test procedure in which only the relevant components of the truck are included, and a representative structure replaces the car. If possible, this would reduce costs and allow for greater repeatability. Analysis and evaluations are done via finite element models using ANSA, LS-Dyna and META. The conceptual design is visualized using CATIA V5. Results show good indication that the passenger car can be replaced by a trolley with deformable barriers mounted on it and the truck can be replaced by a simplified structure with main FUP components mounted onto it. Discussions about the numerical models results and the conceptual design highlight factors that show promising possibilities, but with emphasis on the continued work that is required.
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Vinogradov, Nikolay. "Controlling Electronic and Geometrical Structure of Honeycomb-Lattice Materials Supported on Metal Substrates : Graphene and Hexagonal Boron Nitride." Doctoral thesis, Uppsala universitet, Institutionen för fysik och astronomi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-194089.

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The present thesis is focused on various methods of controlling electronic and geometrical structure of two-dimensional overlayers adsorbed on metal surfaces exemplified by graphene and hexagonal boron nitride (h-BN) grown on transition metal (TM) substrates. Combining synchrotron-radiation-based spectroscopic and various microscopic techniques with in situ sample preparation, we are able to trace the evolution of overlayer electronic and geometrical properties in overlayer/substrate systems, as well as changes of interfacial interaction in the latter.It is shown that hydrogen uptake by graphene/TM substrate strongly depends on the interfacial interaction between substrate and graphene, and on the geometrical structure of graphene. An energy gap opening in the electronic structure of graphene on TM substrates upon patterned adsorption of atomic species is demonstrated for the case of atomic oxygen adsorption on graphene/TM’s (≥0.35 eV for graphene/Ir(111)). A non-uniform character of adsorption in this case – patterned adsorption of atomic oxygen on graphene/Ir(111) due to the graphene height modulation is verified. A moderate oxidation of graphene/Ir(111) is found largely reversible. Contrary, oxidation of h-BN/Ir(111) results in replacing nitrogen atoms in the h-BN lattice with oxygen and irreversible formation of the B2O3 oxide-like structure.      Pronounced hole doping (p-doping) of graphene upon intercalation with active agents – halogens or halides – is demonstrated, the level of the doping is dependent on the agent electronegativity. Hole concentration in graphene on Ir(111) intercalated with Cl and Br/AlBr3 is as high as ~2×1013 cm-2 and ~9×1012 cm-2, respectively.     Unusual periodic wavy structures are reported for h-BN and graphene grown on Fe(110) surface. The h-BN monolayer on Fe(110) is periodically corrugated in a wavy fashion with an astonishing degree of long-range order, periodicity of 2.6 nm, and the corrugation amplitude of ~0.8 Å. The wavy pattern results from a strong chemical bonding between h-BN and Fe in combination with a lattice mismatch in either [11 ̅1] or [111 ̅] direction of the Fe(110) surface. Two primary orientations of h-BN on Fe(110) can be observed corresponding to the possible directions of lattice match between h-BN and Fe(110).     Chemical vapor deposition (CVD) formation of graphene on iron is a formidable task because of high carbon solubility in iron and pronounced reactivity of the latter, favoring iron carbide formation. However, growth of graphene on epitaxial iron films can be realized by CVD at relatively low temperatures, and the formation of carbides can be avoided in excess of the carbon-containing precursors. The resulting graphene monolayer creates a periodically corrugated pattern on Fe(110): it is modulated in one dimension forming long waves with a period of ~4 nm parallel to the [001] direction of the substrate, with an additional height modulation along the wave crests. The novel 1D templates based on h-BN and graphene adsorbed on iron can possibly find an application in 1D nanopatterning. The possibility for growing high-quality graphene on iron substrate can be useful for the low-cost industrial-scale graphene production.
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Svanström, Martin. "Honeycomb & path generation : En struktur för en ständigt växande karta ochgenerell generation av slumpmässiga vägar." Thesis, Linnéuniversitetet, Institutionen för datavetenskap, fysik och matematik, DFM, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-21244.

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Ett spels karta är begränsande i det att när man valt en viss storlek kan man inte gå utanför den ramen utan att göra relativt resurskrävande operationer. Denna undersökning genomfördes för att se om en trädstruktur kan användas som lösning att hantera en honeycomb-struktur på ett lämpligt sätt för att ständigt kunna utöka ett spels karta. Resultatet visar att det är möjligt att använda trädstrukturen relativt bra till växande kartor men att det inte är att rekommendera till spel, eftersom strukturen i sig är en omväg. I samband med denna karta skapades en slumpmässig path-generator som skulle kunna användas till att generellt skapa slumpmässiga kartor i spel. För att se vad försvårigheter man stöter på när man utvecklar en slumpad map-generator, vilket visade sig vara svårt i och med att man hittade många specialfall.
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Books on the topic "Honeycomb structure"

1

Gibson, Lorna J. Cellular solids: Structure & properties. Oxford [Oxfordshire]: Pergamon Press, 1988.

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F, Ashby M., ed. Cellular solids: Structure and properties. 2nd ed. Cambridge: Cambridge University Press, 1997.

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Walker, Sandra P. Evaluation of composite honeycomb sandwich panels under compressive loads at elevated temperatures. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1998.

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Numerical and experimental investigation of hollow sphere structures in sandwich panels. Stafa-Zuerich: Trans Tech Publications, 2008.

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A, Ivanov A. Novoe pokolenie sotovykh zapolniteleĭ dli︠a︡ aviat︠s︡ionno-kosmicheskoĭ tekhniki. Moskva: Ėnergoatomizdat, 2000.

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Bitzer, Tom. Honeycomb technology: Materials, design, manufacturing, applications and testing. London: Chapman & Hall, 1997.

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Endogur, A. I. Sotovye konstrukt͡s︡ii: Vybor parametrov i proektirovanie. Moskva: "Mashinostroenie", 1986.

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Tao, Zhang. Study of impact damage of Nomex honeycomb sandwich plates. Harbin, Heilongjiang Province, China: School of Aeronautics, Harbin Institute of Technology, 1989.

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M, McGowan David. Compression response of a sandwich fuselage keel panel with and without damage. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1997.

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Chamis, C. C. Fiber composite sandwich thermostuctural behavior, computationalsimulation. [Washington, DC]: National Aeronautics and Space Administration, 1986.

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Book chapters on the topic "Honeycomb structure"

1

Ehrlich, Hermann. "Paleodictyon Honeycomb Structure." In Biological Materials of Marine Origin, 137–41. Dordrecht: Springer Netherlands, 2010. http://dx.doi.org/10.1007/978-90-481-9130-7_7.

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Gugliuzza, Annarosa. "Honeycomb Membrane Structure." In Encyclopedia of Membranes, 1–2. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-642-40872-4_895-4.

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Gugliuzza, Annarosa. "Honeycomb Membrane Structure." In Encyclopedia of Membranes, 967–69. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-44324-8_895.

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Ehrlich, Hermann. "Paleodyction- Enigmatic Honeycomb Structure." In Marine Biological Materials of Invertebrate Origin, 81–85. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-319-92483-0_6.

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Zeng, Zhi, Xiaoli Li, Chunguang Li, Zhigang Ye, Cunlin Zhang, and Jingling Shen. "Honeycomb Structure Detection Using Pulsed Thermography." In Lecture Notes in Electrical Engineering, 673–79. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-54233-6_74.

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Zhang, Ya-fei, Jing-wei Liang, Hong-tao Liu, Hong-xue Mi, and Yi-hua Dou. "Recent Advances in Metallic Honeycomb Structure." In Proceedings of the 2021 International Petroleum and Petrochemical Technology Conference, 144–56. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-9427-1_14.

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Govor, L. V., and J. Parisi. "Honeycomb Carbon Networks: Preparation, Structure, and Transport." In Self-Organized Morphology in Nanostructured Materials, 115–53. Berlin, Heidelberg: Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-72675-3_6.

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Michalski, Jakub, and Tomasz Strek. "Fatigue Life of Auxetic Re-entrant Honeycomb Structure." In Lecture Notes in Mechanical Engineering, 50–60. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-16943-5_5.

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Jia, Ruokun, Juan Luo, and Liying Zhen. "Copy the Super-Hydrophobic Honeycomb Structure to PDMS Surface." In Advances in Intelligent and Soft Computing, 787–93. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-25194-8_92.

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Mansoori, Mariam, Safieh Almahmoud, and Daniel Choi. "Development of a Metamaterial Honeycomb Structure for Radar Absorbing Materials." In The Minerals, Metals & Materials Series, 1341–45. Cham: Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-22524-6_130.

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Conference papers on the topic "Honeycomb structure"

1

Zhan, Chi, Mingzhe Li, Robert McCoy, Linda Zhao, and Weiyi Lu. "3D-Printed Hierarchical Re-Entrant Honeycomb With Improved Structural Stability Under Quasi-Static Compressive Loading." In ASME 2021 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/imece2021-68961.

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Abstract Re-entrant honeycombs with negative Poisson’s ratio have shown great potential as lightweight energy absorbers for various applications. However, due to its bending-dominated behavior, the structural stability and energy absorption capacity of reentrant honeycombs are yet to be further improved. It has been demonstrated that hierarchical structures exhibit a combination of lightweight and superior mechanical properties. We hypothesize that by introducing the triangular hierarchical substructures into the conventional cell walls, the bending-dominated behavior of re-entrant honeycombs can be converted into the stretching-dominated one. Consequently, the overall structural stability of the hierarchical re-entrant honeycombs can be promoted through local deformation of hierarchy, which can potentially benefit the energy absorption capacity of the resulted structure. To test our hypothesis, we first fabricate the hierarchical reentrant honeycombs with length scale ranging from micrometer to centimeter using Polyjet 3D-printing technique. Regular reentrant honeycombs with solid struts have been fabricated as baseline structures. The mechanical performance of the honeycombs has been characterized through uniaxial quasi-static compression tests. Besides, the local deformation mechanisms of the hierarchical structure have been revealed by the Digital Image Correlation (DIC). In comparison to the regular re-entrant honeycomb, the global failure strain of hierarchical re-entrant honeycomb is enhanced by 36%. This is due to the improved structural stability from local fracture and densification of the triangular hierarchy. Both the regular and hierarchical honeycombs exhibit the same specific energy absorption capacity. As predicted by the existing scaling laws, the hierarchical re-entrant honeycomb has great potential to outperform regular one by optimizing the relative density of the structure. A finite element model of the hierarchical re-entrant honeycomb has been developed by using commercial software Abaqus/CAE 2020. The model has been calibrated by the experimental data. Within the elastic region, the simulated deformation modes show good agreement with experimental observations. When the relative density of the regular re-entrant honeycombs equals to the hierarchical ones, the model predicts that the hierarchical re-entrant honeycombs have superior energy absorption performance with enhanced stiffness and yield strength in comparison to the regular ones. In conclusion, this study has demonstrated that by introducing hierarchical structure into re-entrant honeycomb, the structural stability has been improved. Furthermore, the hierarchical structure endows re-entrant honeycomb with lightweight yet competitive energy absorption capacity.
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Watkins, Ryan T., John A. Shaw, Nicolas Triantafyllidis, and David Grummon. "Design Study of Shape Memory Alloy Honeycombs for Energy Absorption." In ASME 2011 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASMEDC, 2011. http://dx.doi.org/10.1115/smasis2011-5091.

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Shape memory alloys (SMA), which exhibit the shape memory effect and superelasticity, utilize a reversible solid-solid state phase transformation to recover large strains. Likewise, honeycomb structures under in-plane loading take advantage of deformation kinematics to amplify the structure’s macroscopic strain. The combination of a sparse honeycomb structure made of an SMA material can recover larger deformations than would be possible with either conventional metal honeycombs or monolithic SMAs. NiTi honeycombs and corrugations of about 5% relative density with robust properties were demonstrated recently [1]. Potential future applications include high performance energy absorbers, light-weight deployable devices, and high stroke actuators. This numerical study focuses on the design of superelastic SMA hexagonal honeycombs under in-plane compression for application to reusable energy absorbers. A design study with respect to honeycomb geometric parameters was performed to gain a better understanding of the geometric effects on energy absorption characteristics. A nonlinear finite element method was used to simulate their mechanical response using a hysteretic, trilinear, constitutive law to model the superelastic behavior of SMAs. Bloch wave analysis was used to evaluate the stability characteristics of the honeycomb structure. The corresponding energy absorption characteristics, under constraints of local strain limits, structural stability and allowable force levels, were evaluated to determine the optimum honeycomb geometries. It was found that diamond-like honeycombs, with greater height than width, had the best energy absorption properties.
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Heo, Hyeonu, Jaehyung Ju, Doo-Man Kim, and Chang-Soo Jeon. "Passive Morphing Airfoil With Honeycombs." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-64350.

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A passive morphing may improve the aerodynamic characteristics through structural shape change by aerodynamic loads during the flight, resulting in improving fuel efficiency. The passive morphing structure should have a capability to be highly deformed while maintaining a sufficient stiffness in bending. Honeycombs may be good for controlling both stiffness and flexibility. This paper investigates a honeycomb airfoil’s static deformations through the fluid-structure interaction using computational fluid dynamics and structural finite element analysis. The structural performance will be investigated with varying honeycomb geometries including regular, auxetic and chiral meso-structures.
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Rahman, Kazi Moshiur, Todd Letcher, and Zhong Hu. "Effects of Defects on the Performance of Hierarchical Honeycomb Metamaterials Realized Through Additive Manufacturing." In ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-66940.

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Cellular metamaterials are of immense interest for many current engineering applications. Tailoring the structural organization of cellular structures leads to new metamaterials with superior properties leading to low weight and very strong/stiff materials. Incorporation of hierarchy to regular cellular structures enhances the properties and introduces novel tailorable metamaterials. For many complex cellular metamaterials, the only realistic manufacturing process is additive manufacturing (AM). The use of AM to manufacture large structures may lead to several types of defects during the manufacturing process, such as missing/broken cell walls, irregular thickness, flawed joints, missing (partial) layers, and irregular elastic plastic behavior due to toolpath. For large structures, it would be beneficial to understand the effect of defects on the overall performance of the structure to determine if the manufacturing defect(s) are significant enough to abort and restart or whether the material can still be used. Honeycomb structures are used for the high strength to weight ratio applications. These metamaterials have been studied and several models have been developed based on idealized cell structures to explain their elastic plastic behavior. However, these models do not capture real-world manufacturing defects resulting from AM. The variation of elastic plastic behavior of regular honeycomb structures with defects has been studied, but the performance of hierarchical honeycomb structures with defects is still unknown. In this study, the effects of missing cell walls are investigated to understand the elastic behavior of hierarchical honeycomb structures through simulations using finite element analysis. Regular (zero order), first order and second order hierarchical honeycombs have been investigated in this study. The first level of hierarchy has been implemented by changing each three edge vertex of a regular hexagonal honeycomb lattice by adding another smaller hexagon. The second level of hierarchy is created by adding another smaller hexagon at each three edge vertex of the hexagons added for the first order hierarchy. For the hierarchical cases, the overall density of the honeycomb is held constant to the parent structure (zero order or regular) by reducing the thickness of the cell wall in the first and second order structures. ANSYS® was used to develop finite element models to analyze the performance of both perfect and defected regular, first order and second order hierarchical honeycombs. Defects were added to the model by randomly removing cell walls. Hierarchical honeycombs demonstrated more sensitivity to missing cell walls than regular honeycombs. On average, the elastic modulus decreased by 45% with 5.5% missing cell walls for regular honeycombs, 60% with 4% missing cell walls for first order hierarchical honeycomb and 95% with 4% missing cell walls for second order hierarchical honeycombs.
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Li, Yeping. "Modeling and structural analysis of honeycomb structure mirror." In SPIE Astronomical Telescopes + Instrumentation, edited by Ramón Navarro, Colin R. Cunningham, and Eric Prieto. SPIE, 2012. http://dx.doi.org/10.1117/12.926260.

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Huang, Chen-Yu, Yong-De Xu, Ching-Ming Lee, Te-Ho Wu, Ming-Shinn Hsu, and Zung-Hang Wei. "Cell Manipulation Using Magnetic Honeycomb Structure." In 2016 International Conference of Asian Union of Magnetics Societies (ICAUMS). IEEE, 2016. http://dx.doi.org/10.1109/icaums.2016.8479651.

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Sanjay, K., V. Sabareeshsun, Sangeetha Govindan, K. Reena, M. Saravannan, and Ajayan J. "Automated Honeycomb Composite Structure Repair System." In 2020 6th International Conference on Advanced Computing and Communication Systems (ICACCS). IEEE, 2020. http://dx.doi.org/10.1109/icaccs48705.2020.9074193.

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Zhu, Jian T. "Optical nondestructive examination for honeycomb structure." In Second Intl Conf on Photomechanics and Speckle Metrology: Moire Techniques, Holographic Interferometry, Optical NDT, and Applications to Fluid Mechanics. SPIE, 1991. http://dx.doi.org/10.1117/12.57470.

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ZHAO, BANGHUA, and WENBIN YU. "Multiscale Structural Analysis of Honeycomb Sandwich Structure Using Mechanics of Structure Genome." In American Society for Composites 2017. Lancaster, PA: DEStech Publications, Inc., 2017. http://dx.doi.org/10.12783/asc2017/15171.

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Pathak, P., D. Dzhurinskiy, A. Elkin, P. Shornikov, S. Dautov, and V. Ivanov. "Contribution in Optimization of Honeycomb Abradable Seals Structure." In ITSC2021, edited by F. Azarmi, X. Chen, J. Cizek, C. Cojocaru, B. Jodoin, H. Koivuluoto, Y. C. Lau, et al. ASM International, 2021. http://dx.doi.org/10.31399/asm.cp.itsc2021p0031.

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Abstract The abradable coatings had significantly enhanced turbomachinery performance by acting as a sacrificial seal between rotating blades and stationary casing. Further improvement in seal design to meet the higher energy demand and increase the service time has been the key challenges to solve in the gas turbine industry. Honeycomb seals have become the industry standard clearance seal technique due to their unique design and high structural strength with minimum weight. The present study proposes a concept to form a thermal shock resistance structure to achieve higher temperature capability and improve the reliability of abradable seal structures. A cavity layer of honeycomb seal structure made of SS 321 alloy was coated with advanced high-temperature ZrO2+7.5%Y2O3+4% polyester seal material using TriplexPro-210 plasma spray system. The integrity of a seal structure was assessed by a cross-sectional analysis and evaluation of the coating microstructure. Additionally; the microhardness test was performed to estimate coating fracture toughness; and Object-Oriented Finite Element analysis was used to assess its thermo-mechanical performance. The concept proposed in this study should be further validated to develop the most capable innovative technology for advanced gas turbine abradable seal structures.
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