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Dissertations / Theses on the topic 'Bio-inspired composite'

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1

Deng, Yinhu. "Bio-inspired Multifunctional Coatings and Composite Interphases." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-212223.

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Graphene nanoplatelets have been introduced into the interphase between electrically insulating glass fibre and polymer matrix to functionalize the traditional composite. Owing to the distribution of network structure of GNPs, the interphase can transfer the signals about various internal change of material. Consequently, due to the novel bio-inspired overlapping structure, our GNPs-glass fibre shows a unique opportunity as a micro-scale multifunctional sensor. The following conclusions can be drawn from present research: • We prepared GNPs solution via a scalable and highly effective liquid
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2

Zhao, Wei. "Optimal Design and Analysis of Bio-inspired, Curvilinearly Stiffened Composite Flexible Wings." Diss., Virginia Tech, 2017. http://hdl.handle.net/10919/79143.

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Large-aspect-ratio wings and composite structures both have been considered for the next-generation civil transport aircraft to achieve improved aerodynamic efficiency and to save aircraft structural weight. The use of the large-aspect-ratio and the light-weight composite wing can lead to an enhanced flexibility of the aircraft wing, which may cause many aeroelastic problems such as large deflections, increased drag, onset of flutter, loss of control authority, etc. Aeroelastic tailoring, internal structural layout design and aerodynamic wing shape morphing are all considered to address these
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3

Mujica, Randy. "Layer-by-Layer assembly of nanocellulose composite films with bio-inspired helicoidal superstructures." Thesis, Strasbourg, 2020. http://www.theses.fr/2020STRAE011.

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Les propriétés optiques et mécaniques remarquables des matériaux naturels sont souvent associées à la complexité de leurs structures hiérarchiques. L’une des plus complexes est la structure hélicoïdale, constituée de plusieurs couches de fibres alignées dont l’orientation tourne entre les couches voisines. Cette microstructure, dite de Bouligand, est associée à la résistance aux chocs accrue de la carapace de certains crustacés ainsi qu’à la réflexion préférentielle de la lumière polarisée circulaire de certains fruits et insectes. Dans ce travail, nous avons fabriqué des films minces bio-insp
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4

Liprandi, Daniele. "Numerical Models for Adhesion and Fracture of Biological and Bio-inspired Composite Structures." Doctoral thesis, Università degli studi di Trento, 2022. https://hdl.handle.net/11572/355332.

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Today, the industry still relies on chemical adhesives for most applications. Adhesive tapes and glues are now used in aeronautics, robotics, and other innovative fields. The global adhesive and sealant market is constantly growing due to the versatility of these tools, such as adhesive tapes and glues. However, these products are afflicted by fundamental flaws: they are non-recyclable, disposable tools, of which the manufacturing generates highly toxic chemical waste, both in liquid and aeriform state. The same pattern is also found in the materials for the construction sector.
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5

de, Falco Paolino. "Mechanisms of deformation and energy dissipation in antler and arthropod cuticle with bio-inspired investigations." Thesis, Queen Mary, University of London, 2018. http://qmro.qmul.ac.uk/xmlui/handle/123456789/54050.

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Bio-composite hierarchical materials have attracted the interest of the academic community operating in the field of bio-inspired materials for their outstanding mechanical properties achieved via lightweight structural designs. Antler and mantis shrimp's cuticle are extreme examples of materials naturally optimised to resist impacts and bear dynamic loading. Firstly, a class of finite-element fibril models was developed to explain the origin of heterogeneous fibrillar deformation and hysteresis from the nanostructure of antler. Results were compared to synchrotron X-ray data and demonstrated
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6

Deng, Yinhu [Verfasser], Gert [Akademischer Betreuer] [Gutachter] Heinrich, and Mingqiu [Gutachter] Zhang. "Bio-inspired Multifunctional Coatings and Composite Interphases / Yinhu Deng ; Gutachter: Gert Heinrich, Mingqiu Zhang ; Betreuer: Gert Heinrich." Dresden : Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://d-nb.info/1119363292/34.

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7

Ferraro, Claudio. "Bio-inspired ceramic based composites." Thesis, Imperial College London, 2016. http://hdl.handle.net/10044/1/45538.

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The progress of a wide range of strategic fields from aerospace, construction, transportation or medicine depends on the ability to develop new materials combining different structural and functional properties, from lightweight to high fracture resistance. One way of achieving this is by borrowing design principles found in Natural materials such as bone or nacre and integrating them into man-made materials. A common characteristic of these Natural composites is the combination of hard and soft phases in hierarchical structures with characteristic dimensions spanning multiple length scales. T
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8

Mulakkal, Manu. "Development of bio-inspired cellulosic smart composites for morphing." Thesis, University of Bristol, 2018. http://hdl.handle.net/1983/6c3e48d3-78f7-4ae3-a50d-2dd7f0f65857.

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Materials capable of self-actuation and architectures facilitating re-configuration are highly valued and profoundly sought-after for numerous applications in the fields of robotics, deployable and morphing structures. Here, a bio-inspired approach to realising a programmable materials system capable of morphing was explored and implemented with a specific focus on the sustainability of the material components. The deployment of manually folded paper architectures using a fluid medium as the morphing stimulus presents a simple and inexpensive methodology capable of self-actuation. The material
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9

Galea, Laetitia. "Bio-inspired structured composites for load-bearing bone graft substitution." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2015. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-162693.

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Natural composites, in particular nacre, often combine high strength and toughness thanks to highly ordered architectures and controlled geometries of the reinforcement components. However, combining strength, toughness and resorbability in synthetic materials remains a challenge in particular in the field of bone graft substitutes. In the present study, calcium phosphate-(CaP-)based materials with designed architectures inspired from natural composite materials were achieved. CaP platelets obtained by precipitation in organic medium were first aligned in chitosan matrices by solvent casting i
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10

Lin, Erica (Erica S. C. ). "Bio-inspired design of geometrically-structured suture interfaces and composites." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/98580.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 2015.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student-submitted PDF version of thesis.<br>Includes bibliographical references (pages 90-93).<br>Nature is filled with incredible examples of multi-functional materials that have evolved to possess tailored mechanical behavior. This thesis explores the structure-function-property relationship and design principles of ge
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11

Samur, Algan. "Flexible piezoelectric composites and concepts for bio-inspired dynamic bending-twisting actuation." Thesis, Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/47680.

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12

Najem, Joseph Samih. "Design and Development of a Bio-inspired Robotic Jellysh that Features Ionic Polymer Metal Composites Actuators." Thesis, Virginia Tech, 2012. http://hdl.handle.net/10919/32197.

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This thesis presents the design and development of a novel biomimetic jellyfish robot that features ionic polymer metal composite actuators. The shape and swimming style of this underwater vehicle are based on oblate jellyfish species, which are known for their high locomotive efficiency. Ionic polymer metal composites (IPMC) are used as actuators in order to contract the bell and thus propel the jellyfish robot. This research focuses on translating the evolutionary successes of the natural species into a jellyfish robot that mimics the geometry, the swimming style, and the bell deformation cy
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13

Merindol, Rémi. "Layer-by-layer assembly of strong bio-inspired nanocomposites." Thesis, Strasbourg, 2014. http://www.theses.fr/2014STRAE015/document.

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Les performances exceptionnelles des composites naturels comme la nacre ou le bois émergent de l’arrangement précis d’éléments souples et rigides à l’échelle nanométrique. L’assemblage couche-par-couche permet la fabrication de films avec un contrôle nanométrique de l’organisation et de la composition. Ce travail décrit l’assemblage et les propriétés de nouveaux nano-composites contenant des nano-renforts 1-D (fibrilles de cellulose) et 2-D (plaquettes d’argile). Nous avons combiné les argiles avec une matrice extrêmement souple de poly(diméthylsiloxane) dans une architecture lamellaire imitan
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14

Dimas, Leon Sokratis Schei. "Bio-inspired Composites, a de novo Approach to the Conceptualization, Design and Synthesis of Tough Mesoscale Structures with Simple Building Blocks." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for konstruksjonsteknikk, 2013. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-20740.

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Composites play an important role as structural materials in a range of engineering fields due to their potential to combine the best mechanical properties of their constituents. In biology, composites are ubiquitous and exhibit fascinating and precise architectures at fine length scales, where bone, hexactinellid sponges and nacreous abalone shells are prime examples. By learning from nature a de novo approach is applied leading to the synthesis of bio-inspired tough composites with simple building blocks. Fundamental design principles employed by nature in the assembly of mineralized composi
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15

Dimas, Leon Sokratis Scheie. "Bio-inspired composites : a de novo approach to the conceptualization, design and synthesis of tough mesoscale structures with simple building blocks." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/79497.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2013.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 97-104).<br>Composites play an important role as structural materials in a range of engineering fields due to their potential to combine the best mechanical properties of their constituents. In biology, composites are ubiquitous and exhibit fascinating and precise architectures at fine length scales, where bone, hexactinellid sponges and nacreous abalone shells are prime examples. By learning from nature a
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16

Galea, Laetitia [Verfasser], Christos G. [Akademischer Betreuer] Aneziris, Christos G. [Gutachter] Aneziris, Thomas [Gutachter] Graule, and Marc [Gutachter] Bohner. "Bio-inspired structured composites for load-bearing bone graft substitution / Laetitia Galea ; Gutachter: Christos G. Aneziris, Thomas Graule, Marc Bohner ; Betreuer: Christos G. Aneziris." Freiberg : Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2015. http://d-nb.info/1220912034/34.

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17

Doineau, Estelle. "Modification de fibres de lin par des nanocristaux de cellulose et du xyloglucane pour le développement de composites biosourcés hiérarchiques Adsorption of xyloglucan and cellulose nanocrystals on natural fibres for the creation of hierarchically structured fibres Hierarchical thermoplastic biocomposites reinforced with flax fibres modified by xyloglucan and cellulose nanocrystals Development of Bio-Inspired Hierarchical Fibres to Tailor the Fibre/Matrix Interphase in (Bio)composites." Thesis, IMT Mines Alès, 2020. http://www.theses.fr/2020EMAL0007.

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Ce travail de thèse vise à développer un traitement de surface de fibres de lin pour l’amélioration des propriétés mécaniques de biocomposites à matrice polymère et renforts en lin. Cette modification de surface s’inspire des structures hiérarchiques présentes dans les systèmes biologiques (os, nacre ou bois), constitués de nano-objets permettant un meilleur transfert de charges dans ces matériaux. Cette présence d’objets de dimensions nanométriques permet notamment d’atteindre des valeurs de contrainte et ténacité élevées et de limiter la propagation de fissures. Dans ces travaux de recherche
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18

(8782580), Di Wang. "Mechanical behaviors of bio-inspired composite materials with functionally graded reinforcement orientation and architectural motifs." Thesis, 2020.

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<p>Naturally-occurring biological materials with stiff mineralized reinforcement embedded in a ductile matrix are commonly known to achieve excellent balance between stiffness, strength and ductility. Interestingly, nature offers a broad diversity of architectural motifs, exemplify the multitude of ways in which exceptional mechanical properties can be achieved. Such diversity is the source of bio-inspiration and its translation to synthetic material systems. In particular, the helicoid and the “brick and mortar” architectured materials are two key architectural motifs we are going to study an
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19

Abreu, Beatriz Martins de. "Bio-inspired nanocellulose composites systems with structural coloration as optical security features." Master's thesis, 2019. http://hdl.handle.net/10362/91293.

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20

Galea, Laetitia. "Bio-inspired structured composites for load-bearing bone graft substitution." Doctoral thesis, 2014. https://tubaf.qucosa.de/id/qucosa%3A22974.

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Natural composites, in particular nacre, often combine high strength and toughness thanks to highly ordered architectures and controlled geometries of the reinforcement components. However, combining strength, toughness and resorbability in synthetic materials remains a challenge in particular in the field of bone graft substitutes. In the present study, calcium phosphate-(CaP-)based materials with designed architectures inspired from natural composite materials were achieved. CaP platelets obtained by precipitation in organic medium were first aligned in chitosan matrices by solvent casting i
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21

Lee, Pang Hsuan, and 李邦璿. "Synthesis of Hierarchically Porous Structured Bio-Inspired Composites by Diatomites and Freeze Casting." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/k755yy.

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碩士<br>國立清華大學<br>材料科學工程學系<br>103<br>Porous composites are widely applied in various fields due to their lightweight, high surface/volume ratio and energy absorbing ability. Natural porous composites, such as bird feathers, beaks and bones, possess lightweight and superior mechanical properties due to their anisotropic, hierarchically porous structure. In this study, we synthesized ultra-lightweight, multifunctional scaffolds mimicking natural porous composites by the freeze casting technique utilizing diatomaceous earth (DE) as raw materials. By controlling the cooling rate, sintering condition
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