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Dissertations / Theses on the topic 'Sandwich structure composite'

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Published: 3 June 2025
Last updated: 31 July 2025

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1

Violette, Michael A. "Fluid structure interaction effect on sandwich composite structures." Thesis, Monterey, California. Naval Postgraduate School, 2011. http://hdl.handle.net/10945/5533.

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Approved for public release; distribution is unlimited.<br>The objective of this research is to examine the fluid structure interaction (FSI) effect on composite sandwich structures under a low velocity impact. The primary sandwich composite used in this study was a 6.35-mm balsa core and a multi-ply symmetrical plain weave 6 oz E-glass skin. The specific geometry of the composite was a 305 by 305 mm square with clamped boundary conditions. Using a uniquely designed vertical drop-weight testing machine, there were three fluid conditions in which these experiments focused. The first of these co
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2

Rallo, Ayerbe Marta. "Impact sur structure composite sandwich architecturée : application aux pales d'avions." Electronic Thesis or Diss., Université de Toulouse (2023-....), 2024. http://www.theses.fr/2024TLSES088.

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La sécurité constitue un aspect essentiel au développement des pièces et assemblages aéronautiques. Pour un avion à hélices, les pales assurent la propulsion de l'appareil, et garantissent sa portance. Elles sont essentielles. C'est pourquoi des essais de certification à l'impact oiseau sont nécessaires afin de garantir la capacité de l'avion à se poser en mode dégradé. Ces essais ont lieu à la fin de la phase de développement. Une caractérisation du comportement à l'impact en amont est nécessaire afin d'éviter d'éventuels coûts supplémentaires liés aux mauvais résultats de ces tests Les pales
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3

Bull, Peter H. "Damage tolerance and residual strength of composite sandwich structures." Doctoral thesis, KTH, Aeronautical and Vehicle Engineering, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3757.

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<p>The exploitation of sandwich structures as a means toachieve high specific strength and stiffness is relatively new.Therefore, the knowledge of its damage tolerance is limitedcompared to other structural concepts such as truss bars andmonocoque plate solutions.</p><p>Several aspects of the damage tolerance of sandwichstructures are investigated. The influence of impact velocityonresidual strength is investigated. Sandwich panels withfaces of glass fiber reinforced vinylester are impacted bothwith very high velocity and quasi static. The residual strengthafter impact is found to be similar f
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4

Tran, Van Luan. "Etude du comportement hygro-thermo-mécanique d'un matériau composite sandwich avec âme balsa utilisé en applications navales." Nantes, 2013. http://www.theses.fr/2013NANT2001.

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Les matériaux composites sandwichs ont été largement adoptés dans le domaine naval car ils présentent des atouts de légèreté et de bonne résistance mécanique. Cependant, leur tenue à l'humidité en environnement marin est encore difficile à prédire et leur résistance au feu constitue l'une des limitations principales à leur utilisation dans un plus grand nombre de cas. Ce travail s'intéresse au comportement d'un composite sandwich à base de peaux en verre-polyester et d'une âme balsa. Le balsa, élément principal du matériau, peut absorber une très grande quantité d'eau ce qui peut alors affecte
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5

Yang, Bing. "Thermoplastic and Thermoset Natural Fiber Composite and Sandwich Performance." Thesis, University of North Texas, 2014. https://digital.library.unt.edu/ark:/67531/metadc500002/.

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The objective of this thesis is to investigate the effects of adding natural fiber (kenaf fiber, retted kenaf fiber, and sugarcane fiber) into polymer materials. The effects are obtained by considering three main parts. 1. Performance in thermoplastic composites. The effect of fiber retting on polymer composite crystallization and mechanical performance was investigated. PHBV/PBAT in 80/20 blend ratio was modified using 5% by weight kenaf fiber. Dynamic mechanical analysis of the composites was done to investigate the glass transition and the modulus at sub-ambient and ambient temperatures. ES
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Bail, Justin L. "Non-desctructive investigation & FEA correlation on an aircraft sandwich composite structure." Akron, OH : University of Akron, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=akron1196702586.

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Thesis (M.S.)--University of Akron, Dept. of Civil Engineering, 2007.<br>"December, 2007." Title from electronic thesis title page (viewed 02/25/2008) Advisor, Wieslaw Binienda; Faculty readers, Craig Menzemer, Robert Goldbert; Department Chair, Wieslaw Binienda; Dean of the College, George K. Haritos; Dean of the Graduate School, George R. Newkome. Includes bibliographical references.
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Bail, Justin. "Non-Destructive Investigation & FEA Correlation on an Aircraft Sandwich Composite STructure." University of Akron / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=akron1196702586.

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8

Salem, Adel I. "Weight and Cost Multi-Objective Optimization of Hybrid Composite Sandwich Structures." University of Dayton / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1478637482819839.

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9

Lundgren, Eric Charles. "Durable Sandwich Structure Joining Technology for NASA's Ares V Launch Vehicle." Thesis, Virginia Tech, 2010. http://hdl.handle.net/10919/79693.

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Joining of uniformly-curved composite sandwich panel segments, typical in state of the art aerospace launch vehicles, should be mass-efficient. Adhesively bonded joints can provide increased mass-efficiency over mechanically-fastened joints. But, due to manufacturing sensitivities and certification requirements, conventional bonded joints can be improved upon by introducing structural redundancy. A longitudinal, durable redundant joint (DRJ) architecture featuring multiple adhesive load-paths, via a novel composite preform insert, was proposed to join composite sandwich panel segments of the i
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10

Khasawneh, Firas Abdallah. "Characterization of drillability of sandwich structure of carbon fiber reinforced epoxy composite over titanium alloy." Diss., Columbia, Mo. : University of Missouri-Columbia, 2006. http://hdl.handle.net/10355/5871.

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Thesis (M.S.)--University of Missouri-Columbia, 2006.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on September 13, 2007). Vita. Includes bibliographical references.
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11

Almusawi, Aqil mousa. "Mise en œuvre et optimisation des propriétés d'une structure sandwich en matériaux biosourcés (fibres et bois de chanvre) avec une matrice en polystyrène expansé pour le bâtiment." Thesis, Bourgogne Franche-Comté, 2017. http://www.theses.fr/2017UBFCA009/document.

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La fonctionnalisation croissante des matériaux de constructions ainsi que le besoin de gestion des ressources de l'humanité rend les matériaux traditionnels à base de ciment moins performant.De nouvelles structures de paroi peuvent être envisagées en optimisant le choix de matériaux et leurs agencements. Dans ce travail nous avons choisi d'évaluer une structure pouvant remplir toutes les fonctions d'une paroi type « maison individuelle » ceci en utilisant des matériaux à faible coût et en utilisant des procédés de fabrications classiques. Les matériaux choisis proviennent majoritairement d'une
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IURLARO, LUIGI. "Development of refined models for multilayered composite and sandwich structures: analytical formulation, FEM implementation and experimental assessment." Doctoral thesis, Politecnico di Torino, 2015. http://hdl.handle.net/11583/2606162.

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Over the last three decades, composite materials have been increasingly used in different engineering field due to their high stiffness-to-weight and strength-to-weight ratios. Nowadays, relatively thick laminated composite and sandwich materials with one hundred or more layers find their applications in primary load-bearing structural components of the modern aircraft. To ensure a reliable design and failure prediction, accurate evaluation of the strain/stress state is mandatory. A high-fidelity analysis of multilayered composite and sandwich structures can be achieved by adopting detailed 3D
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13

Pascal, Florian. "Modélisation d'impacts sur structures sandwichs composites : application aux pales d'hélicoptères." Toulouse 3, 2016. http://www.theses.fr/2016TOU30271.

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Les pales d'hélicoptère sont des pièces composites complexes qui assurent la sustentation de l'appareil. En phase de vol, un impact sur ce type de structure peurt engendrer des dommages importants dont les conséquences peuvent être critiques pour l'appareil. Du fait de l'angle d'incidence des pales, la zone intrados est particulièrement exposée à ce type de sollicitation. Cette thèse a pour objectif de développer un modèle d'impact fiable et prédictif qui vise à mieux comprendre les mécanismes d'endommagement mis en jeu pour, à termes, proposer de nouvelles architectures de pales<br>Helicopter
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Schneider, Christof. "Recyclable self-reinforced ductile fiber composite materials for structural applications." Doctoral thesis, KTH, Lättkonstruktioner, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-174131.

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Lightweight structures in vehicles are a proven way to reduce fuel consumption and the environmental impact during the use. Lower structural weight can be achieved by using high performance materials such as composites or using the material efficiently as a sandwich structure. Traditional composite materials such as carbon or glass fiber reinforced polymers have high weight specific mechanical properties but are inherently brittle and expensive. They consist of at least two different materials making recycling a difficult endeavor.The best composite material would have good weight specific pro
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15

Tom, Louis-Georges. "Contribution à l'étude numérique de la propagation d'un défaut de collage dans une structure sandwich Nida." Thesis, Le Mans, 2014. http://www.theses.fr/2014LEMA1036/document.

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SAFRAN Aircelle produit des panneaux sandwiches constitués de peaux composites collées sur une âme nid d’abeille (« Nida ») en aluminium pour des applications de nacelle de moteur d’avion. Des décollements locaux peuvent exister à l’interface peau/Nida et réduire significativement la capacité structurale de ces sandwiches. L’objectif de cette thèse entre l’ISMANS et SAFRAN Aircelle réside dans la mise en place d’une approche de type « Virtual testing » pour réduire les coûts de validation et de vérification des sandwiches possédant des décollements.L’originalité de ces travaux vient du choix d
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Del, Broccolo Simone. "Effets de la topologie des cellules d'une structure en nid d'abeille." Thesis, Bourgogne Franche-Comté, 2020. http://www.theses.fr/2020UBFCD001.

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Les panneaux composites sandwich possédant une âme nid d'abeille permettent de disposer à la fois de propriétés statiques hors plan intéressantes (en raison de leur rigidité équivalente élevée) et de caractéristiques de masses faibles. Pour cette raison, ils sont largement utilisés dans les industries aérospatiale, automobile et navale. Les environnements dans lesquels ces matériaux sont utilisés mettent en jeu des efforts dans des gammes de fréquences larges. Si un rapport rigidité / masse élevé est profitable dans le domaine des basses fréquences, il conduit généralement à des comportements
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Goupil, Anne-Charlotte. "Contribution à l'étude numérique du comportement au feu d'un panneau composite pour l'industrie navale." Thesis, Le Mans, 2016. http://www.theses.fr/2016LEMA1003/document.

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Pour être commercialisés et installés à bord des navires, les panneaux structuraux tels que les cloisons et les pontsdoivent passer avec succès un essai normalisé de résistance au feu de type ISO 834. De tels essais sont longs et coûteux,les constructeurs de panneaux souhaitent par conséquent maximiser les chances de succès lors du passage de leur produitau test en particulier pour les designs alternatifs que constituent les sandwichs composite.La simulation par éléments finis est un outil pour modéliser le comportement thermomécanique de telles structures.Les codes industriels comme SAMCEF qu
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18

Denli, Huseyin. "Structural-acoustic optimization of composite sandwich structures." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 168 p, 2007. http://proquest.umi.com/pqdlink?did=1251904511&Fmt=7&clientId=79356&RQT=309&VName=PQD.

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19

Hoang, Minh Phuc. "Homogénéisation analytique de structures de nid d'abeille pour des plaques composites sandwich." Thesis, Reims, 2015. http://www.theses.fr/2015REIMS011/document.

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L'objectif de cette thèse est de développer des modèles d'homogénéisation analytiques de panneaux sandwichs en nid d'abeilles. A la différence des méthodes classiques, l'effet des peaux est pris en compte, conduisant à des propriétés mécaniques très différentes. Dans les cas des tractions, flexions, cisaillement dans le plan, cisaillements transversaux et torsion, différentes séries de fonctions analytiques sont proposées pour prendre en compte la redistribution des contraintes entre les parois du nid d'abeilles. Nous avons étudié l'influence de la hauteur du nid d'abeilles sur les propriétés
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20

Khdhayyer, Muhanned. "Mixed matrix membranes comprising metal organic frameworks and high free volume polymers for gas separations." Thesis, University of Manchester, 2017. https://www.research.manchester.ac.uk/portal/en/theses/mixed-matrix-membranes-comprising-metal-organic-frameworks-and-high-free-volume-polymers-for-gas-separations(172f6a4f-a531-44ae-979c-bbbd170f33db).html.

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This research aimed to develop new composite membranes using a polymer of intrinsic microporosity (PIM-1) and metal organic frameworks (MOFs) for use in gas separations. PIM-1 was successfully synthesised using the high temperature method (40 min, 160 oC) and the resulting polymer was cast into membranes. PIM-1 membranes were chemically modified by reacting hexamethylenediamine (HMDA) with the nitrile group of PIM-1 to form HMDA-modified PIM-1 membranes. Surfaces of PIM-1 membranes were also modified by basic hydrolysis to form amide-modified PIM-1 membranes. These polymer materials were chara
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Philippe, Marie-Hélène. "Etudes de quelques modélisations de structures en composite à haute rigidité en flexion." Phd thesis, Ecole Nationale des Ponts et Chaussées, 1997. http://tel.archives-ouvertes.fr/tel-00529473.

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L'objet de ce mémoire est de proposer des outils de conception pour le dimensionnement en raideur de panneaux fléchissants en composite à rigidité spécifique élevée. On y présente dans une première partie, une nouvelle formulation de la théorie classique des stratifiés de Reissner-Mindlin (Théorie de Sab), et des modélisations multiparticulaires issues de la théorie M4 (Modélisation Multiparticulaire des Matériaux Multicouches), adaptées à la description du comportement des structures traditionnelles sandwich en composite, dont on connaît les propriétés mécaniques équivalentes de l'âme. Dans u
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Lainé, Christian. "Étude numérique et expérimentale du comportement mécanique de plaques et coques sandwich : développement d'un élément non-linéaire, grandes transformations et application au flambement de plaques raidies en construction navale." Université Joseph Fourier (Grenoble ; 1971-2015), 1998. http://www.theses.fr/1998GRE10037.

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Cette etude s'interesse au comportement mecanique des structures en materiaux composites epais, utilisees en construction navale (monolithiques epais et sandwichs). Une attention particuliere est apportee au comportement en flambement. La premiere etape consiste a identifier les caracteristiques materiaux. Des essais permettant de determiner la contrainte de compression, les modules de cisaillement transverse ainsi que le comportement non-lineaires sont examines. Une procedure de caracterisation en vue du calcul est proposee. La seconde etape aboutit au developpement de deux elements coques, n
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Philippe, Marie-Hélène. "Etudes de quelques modélisations de structures en composite à haute rigidité en flexion." Phd thesis, Marne-la-vallée, ENPC, 1997. http://www.theses.fr/1997ENPC9709.

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L'objet de ce mémoire est de proposer des outils de conception pour le dimensionnement en raideur de panneaux fléchissant en composite à rigidité spécifique élevée. On y présente dans une première partie, une nouvelle formulation de la théorie classique des stratifiés de Reissner-Mindlin (Théorie de Sab), et des modélisations multiparticulaires issues de la théorie M4 (Modélisation Multi particulaire des Matériaux Multicouches), adaptées à la description du comportement des structures traditionnelles sandwich en composite, dont on connait les propriétés mécaniques équivalentes de l'âme. Dans u
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BORAZJANI, SOROOSH. "Light-weight design of vehicle roof panel for stiffness and crash analyses." Doctoral thesis, Politecnico di Torino, 2016. http://hdl.handle.net/11583/2678846.

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Vehicle crashworthiness refers to proper designing of the vehicle structure to reduce the risk of death and injury during the vehicle accidents. In the recent years, due to the enforcement of new EU normative, the interest of all the car manufacturers in producing lightweight vehicles is progressively increased as the combustion engine optimization has already used most of the improvements they had and the residual ones are becoming more and more difficult and costly. Based on this auto industry’s interest, lightweight materials such as composite have absorbed lots of attention due to their su
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Davies, Andrew. "Crashworthiness of composite sandwich structures." Thesis, Imperial College London, 2002. http://hdl.handle.net/10044/1/8402.

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Ramakrishnan, Karthik Ram. "Impact behaviour of sandwich structures with nanoparticle reinforced composite face sheets." Thesis, Paris, ENSAM, 2014. http://www.theses.fr/2014ENAM0042/document.

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Les structures sandwich sont des structures légères composées de deux peaux superficielles minces, relativement denses, à haute résistance qui sont collées de part et d'autre d'une âme, épaisse, de faible densité telle que les mousses ou nids d'abeilles. Les matériaux sandwich à peau composite renforcée de fibres plastiques et à cœur en matériaux polymère représentent aujourd'hui une classe importante des matériaux structuraux légers dans de nombreux domaines de l'ingénierie tels que l'aéronautique et l'aérospatiale, l'automobile et les structures marines. Toutefois, certaines de ces structure
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Yu, Zhaohui Crocker Malcolm J. "Static, dynamic and acoustical properties of sandwich composite materials." Auburn, Ala., 2007. http://repo.lib.auburn.edu/2006%20Fall/Dissertations/YU_ZHAOHUI_54.pdf.

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Kazemahvazi, Sohrab. "Impact Loading of Composite and Sandwich Structures." Doctoral thesis, KTH, Lättkonstruktioner, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-25141.

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Low weight is one of the most important factors in the design process of high speed naval ships, road vehicles and aircrafts. Lower structural weight enables the possibility of down-sizing the propulsion system and thus decrease manufacturing and operating costs as well as reducing the environmental impact. Two efficient ways of reducing the structural weight of a structure is by using high performance composite materials and by using geometrically efficient structures such as the sandwich concept. In addition to good quasi-static performance different structures have dynamic impact requiremen
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Akil, Hazizan Md. "The impact response of composite sandwich structures." Thesis, University of Liverpool, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.399096.

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Trask, Richard Simon. "Damage tolerance of repaired composite sandwich structures." Thesis, University of Southampton, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.416072.

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Al-Hamdan, Ali. "Resin transfer moulding of sandwich structures." Thesis, University of Nottingham, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.362997.

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Avachat, Siddharth. "Experimental and numerical analyses of dynamic deformation and failure in marine structures subjected to underwater impulsive loads." Thesis, Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/44904.

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The need to protect marine structures from the high-intensity impulsive loads created by underwater explosions has stimulated renewed interest in the mechanical response of sandwich structures. The objective of this combined numerical and experimental study is to analyze the dynamic response of composite sandwich structures and develop material-structure-property relations and design criteria for improving the blast-resistance of marine structures. Configurations analyzed include polymer foam core structures with planar geometries. A novel experimental facility to generate high-intensity under
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Maheri, M. R. "Vibration damping in composite/honeycomb sandwich beams." Thesis, University of Bristol, 1991. http://hdl.handle.net/1983/d96ba3e9-edb0-4a07-ac6e-69328ed22678.

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Slade, R. "Composite faced sandwich construction for primary spacecraft structures." Thesis, Cranfield University, 1989. http://hdl.handle.net/1826/3827.

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This study investigated the application of fibre reinforced composite materials to spacecraft sandwich structures. In particular, aspects of the manufacture, analysis and design optimisation of components fabricated using the co-cure process were studied. The manufacturing process was developed to ultimately enable a full size thrust tube structure to be built using a single step cure, the design of which was verified by a modal survey test. Techniques for the analysis of stiffness, strength., vibration frequencies and local instability were established and found to correlate well with tests o
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Kulandaival, Palanivel Palaniathevar. "Manufacturing and performance of thermoplastic composite sandwich structures." Thesis, University of Nottingham, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.438298.

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Velecela, Chuquilla Orlando Jonathan. "Energy absorption capability of GRP composite sandwich structures." Thesis, University of Sheffield, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.434504.

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Gigliotti, Luigi. "Multiscale analysis of damage-tolerant composite sandwich structures." Thesis, Imperial College London, 2016. http://hdl.handle.net/10044/1/32365.

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Composite sandwich structures are widely regarded as a cost/weight-effective alternative to conventional composite stiffened panels and are extensively utilized for lightweight applications in various sectors, including the aeronautical, marine and transport industries. Nevertheless, their damage tolerance remains a critical issue. This work aims to develop reliable analytical and numerical tools for the design of damage-tolerant advanced foam-cored composite sandwich structures for aerospace applications. It comprises of original experimental observations together with novel numerical and ana
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Li, Zhuang. "Vibration and acoustical properties of sandwich composite materials /." Auburn, Ala., 2005. http://repo.lib.auburn.edu/2005%20Fall/Dissertation/LI_ZHUANG_26.pdf.

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Kratz, James. "Processing composite sandwich structures using out-of-autoclave technology." Thesis, McGill University, 2009. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=67000.

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Currently, out-of-autoclave (OOA) technology is being used to design and manufacture composite structural components at lower costs. OOA technology enables composites to be produced using only vacuum pressure, eliminating the cost of purchasing and operating an autoclave. The key to OOA prepreg is that they are specially designed to remove air that is entrapped during the lay-up process. The in-plane and through thickness permeability of the prepreg were characterized to determine which bagging configuration would produce the best honeycomb sandwich structure. The bagging con
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Chen, Jiaqi. "Design of vehicle frontal protection systems capable of meeting future pedestrian safety requirements." Thesis, Queensland University of Technology, 2016. https://eprints.qut.edu.au/96270/1/Jiaqi_Chen_Thesis.pdf.

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This research project develops an advanced computer model for the new design of Toyota Vehicle Frontal Protection System (VFPS) in terms of the future pedestrian safety requirements. The research method is based on the numerical simulation of dynamic vehicle-pedestrian collisions following New Car Assessment Program protocols. The numerical models which were validated by experimental data can accurately predict the Toyota VFPS products of pedestrian-friendliness.
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Davis, Richard Anthony. "The Effects of a Damage Arrestment Device on the Mechanical Behavior of Sandwich Composite Beams Under Four-Point Bending." DigitalCommons@CalPoly, 2011. https://digitalcommons.calpoly.edu/theses/506.

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The demand for an insert on composite sandwich structures to aid in the arrestment of face-core delamination is of great need. This research studies the use of a damage arrestment device (DAD) that connects the carbon fiber face sheets to the foam core to find whether an increase in the structural integrity of the sandwich beam results. Experimental analysis was employed to test the samples and was verified by a theoretical and finite element approach. The mechanical properties of LTM45/CF1803 pre-impregnated carbon fiber and Last-A-foam FR 6710 polyvinylchloride foam were experimentally ana
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Zedde, Nicola. "Dynamic mechanical-thermal, microstructural and mechanical analysis of ultra-light polymer-metal composites: influence of forming." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016.

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A really particular and innovative metal-polymer sandwich material is Hybrix. Hybrix is a product developed and manufactured by Lamera AB, Gothenburg, Sweden. This innovative hybrid material is composed by two relatively thin metal layers if compared to the core thickness. The most used metals are aluminum and stainless steel and are separated by a core of nylon fibres oriented perpendicularly to the metal plates. The core is then completed by adhesive layers applied at the PA66-metal interface that once cured maintain the nylon fibres in position. This special material is very light and forma
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Flor, Felipe Rendeiro. "Damage monitoring in composite structures via vibration based method: metal-composite bonded joints and sandwich structures." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/18/18148/tde-04042016-161659/.

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The present document covers the studies over Structural Health Monitoring systems via vibration based methods. The topic is organized in two parallel studies. The first one analyzes the integrity of metal-composite single lap bonded joints. The second one approaches similar analyses for sandwich structures. The monitoring was made by investigating the dynamic response both computationally and experimentally to verify the reliability of applying vibration based SHM procedures, specifically with the objective of identifying the presence of debonding damage. The dynamic responses were obtained vi
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Wennhage, Per. "Structural-Acoustic Optimization of Sandwich Panels." Doctoral thesis, Stockholm, 2001. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3161.

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45

Lee, Hoon. "Drop-weight and ballistic impact of honeycomb composite sandwich structures." Thesis, Imperial College London, 2004. http://hdl.handle.net/10044/1/7141.

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46

Ryan, Shannon, and shannon ryan@studentems rmit edu au. "Hypervelocity Impact Induced Disturbances on Composite Sandwich Panel Spacecraft Structures." RMIT University. Aerospace, Mechanical & Manufacturing Engineering, 2007. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20080808.092240.

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The next generation of European scientific satellites will carry extremely sensitive measurement devices that require platform stability orders of magnitude higher than current missions. It is considered that the meteoroid and space debris (M/SD) environment poses a risk to the success of these missions as disturbances induced by the impact of these particles at hypervelocity may degrade the platform stability below operational requirements. In this thesis, disturbances induced by the impact of M/SD particles at hypervelocity on a representative scientific satellite platform have been in
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47

Othman, Abdul Rahim. "Quasi-static and impact characteristics of honeycomb composite sandwich structures." Thesis, University of Leeds, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.435821.

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48

Petras, Achilles. "Design of sandwich structures." Thesis, University of Cambridge, 1999. https://www.repository.cam.ac.uk/handle/1810/236995.

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Failure modes for sandwich beams of GFRP laminate skins and Nomex honeycomb core are investigated. Theoretical models using honeycomb mechanics and classical beam theory are described. A failure mode map for loading under 3-point bending, is constructed, showing the dependence of failure mode and load on the ratio of skin thickness to span length and honeycomb relative density. Beam specimens are tested in 3-point bending. The effect of honeycomb direction is also examined. The experimental data agree satisfactorily with the theoretical predictions. The results reveal the important role of cor
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49

Sheikh, Md Fadzullah Siti. "The oblique impact response of composites and sandwich structures." Thesis, University of Liverpool, 2014. http://livrepository.liverpool.ac.uk/2008219/.

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This research project focussed on the low-velocity oblique impact response of glass fibre-reinforced epoxy laminates and sandwich structures with a range of polymeric cores of linear PVC and PET with nominal densities in the range of 90-140 kg/m3, conducted at normal (0°), 10° and 20° inclination angles, at energies up to 40 J. For the laminated composites and the linear PVC sandwich structures, at maximum impact energies, the damage area reduced whilst the energy absorbed increased with increasing inclination angle. Damage took the form of matrix cracking, due to bending and shear, combining
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Derré, Jérémie. "Conception vibro-acoustique de panneaux composites intégrant des structures fractales." Thesis, Toulouse, ISAE, 2019. http://www.theses.fr/2019ESAE0019/document.

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Les structures sandwichs à cœur cellules nid d'abeilles sont largement employées dans l'industrie aéronautique, notamment pour leur grande rigidité de flexion à faible masse. Cette dernière caractéristique résulte également en une diminution de la transmission et une augmentation du rayonnement acoustique de ces structures. On cherche à modéliser une nouvelle stratégie passive de réduction des vibrations mécaniques et du rayonnement, se basant sur le principe de localisation des vibrations du matériau. L'idée fondatrice est l'insertion au sein du matériau d'hétérogénéités créant des obstacles
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