Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 31 for “"Metal composite"”.
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TiO2-doped Ionic Polymer-Metal Composite Actuator
Ionic polymer metal composites (IPMCs) have received substantial attention in the past several years. IPMC actuators are capable of complex deformation in water and air and they are soft actuation materials with promising applications in wide range of fields, such as robotics and medical devices. …
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Nanostructured ceramic-metal composite materials of technological interest.
… transición energética. En este sentido, los nanocomposites cerámica-metal, y en particular los materiales compuestos de matriz carbonosa (grafito o grafeno) y disperso metálico (molibdeno o cromo), son un campo de investigación prometedor. De esta manera, la tesis se ha dividido en dos grandes …
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Microstructural evolution of sputtered phase segregated metal composite thin films
… texture development in three different types of metal thin film composites: fully miscible (Au-Ag), slightly immiscible (Cu-Ag) and immiscible (Au-SiO 2). Texture development refers to the distribution of orientations of crystallites in polycrystalline thin films, and is an important part of the …
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Fabrication and characterizations of recycled aluminium-copper-cullet powder (AL-CU-CP) metal composite
Aluminium-Copper-Cullet powder (Al-Cu-CP) metal composite was fabricated from recycled materials, using recycled Aluminium (Al) obtained from scrap door and window frames, copper (Cu) wire scrap and cullet powder (CP). The research focused on fabricating the composite with improved properties which …
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Ion Conducting Polyelectrolytes in Conductive Network Composites and Humidity Sensing Applications for Ionic Polymer-Metal Composite Actuators
Ionic polymer-metal composites (IPMCs) are widely studied for their potential as electromechanical sensors and actuators. Bending of the IMPC depends on internal ion motion under an electric potential, and the addition of an ionic liquid and ionic self-assembled multilayer (ISAM) conductive network …
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Development of experimental and numerical methodologies for the investigation of composite and hybrid metal-composite fastened joints subjected to impact loads
… the mechanical response of several types of composite coupons, composite or hybrid fastened joints and a hybrid large-scale panel with several fasteners, is conducted under dynamic (impact) and quasi-static loading conditions with the aid of efficient experimental and numerical methodologies …
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Modeling and Optimizing IPMC Microgrippers
… the size and shape of IPMC (Ionic Polymer Metal Composite) fingers. Using Comsol Multiphysics and modeFRONTIER, these fingers were modeled and optimized for both force exerted and deflection. Using the Comsol model, we were able to determine the tip deflection and force output of many …
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Fractional Order Systems:PID Controller Design and Fractional Order Element Modeling
… to the modeling and control of Ionic Polymer Metal Composite (IPMC) and than a study on Fractional Order Elements modeling as possible building block for controller implementation is proposed. Finally the conclusions are presented in the Chapter 4.
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Energy Absorption of Metal-FRP Hybrid Square Tubes
… mass production of vehicles manufactured from composite materials. One of the potential applications of composite materials in vehicles is in energy-absorbing components such as hollow shells and struts (these components may be in the form of circular cylindrical shells, square and rectangular …
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The Application of Thin Film Ionic Self-assembled Multilayer (ISAM) Nanostructures in Electromechanical Bending Actuators and Micro-fabricated Gas Chromatography (uGC) Devices
… technique. Their application in ionic polymer-metal composite (IPMC) electromechanical bending actuators and microfabricated gas chromatography (microGC) devices were investigated and significant performance improvements of these devices were achieved. IPMC bending actuators, consisting of an …
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Design and Characterization of Sectored (Patterned) IPMC Actuators for Propulsion and Maneuvering in Bio-Inspired Underwater Systems
… to characterize the performance of ionic polymer-metal composite (IPMCs) propulsors for underwater applications, namely for propelling and maneuvering small bio-inspired autonomous systems. Specifically, this work examines the capabilities of IPMCs with sectored (patterned) electrodes. The …
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Modeling, simulation and applications of ionic polymer metal composites
… to predict the behavior of Ionic Polymer Metal Composite (IPMC). The analysis is carried out using commercial software COMSOL. The response of electro actuated IPMC, including the displacement and electric potentials profiles, of the IPMC is numerically calculated. Furthermore, IPMC-fluid …
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Dimensional Control in Ceramics Printed by Projection Microstereolithography
… applications, especially when combined with a metal to create a ceramic-metal composite, or a cermet. Because of this, a need to shape ceramics with greater flexibility than the traditional ceramic processing methods can allow has arisen. Additive manufacturing is a promising potential solution …
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Mitigating IPMC Back Relaxation Through Feedforward and Feedback Control of Patterned Electrodes
… the back relaxation behavior in ionic polymer-metal composite (IPMC) actuators. With low driving voltage (<5V) and the ability to be operated in aqueous environments, IPMCs have gained great attention in recent years for use in many applications including soft bio-inspired actuators and …
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Advanced Manufacturing of Microengineered Ionic Polymer Metal Composites for Enhanced Sensing Capabilities
Ionic Polymer Metal Composites (IPMCs) are ionic electroactive polymers thatexhibit active and passive actuation, sensing, and energy harvesting capabilities. The composite is comprised of an ionic exchange membrane that is sandwiched between two noble metal electrodes and infused with a polar …
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Innovative Design Concepts for Insulated Joints
… strengths of these two materials. The Insulating Metal Composite (IMC) insulated joint design that uses ceramics is determined to be the most promising of the new designs and is pursued through prototype fabrication. This particular joint design is analyzed structurally using both closed form …
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Strengthening of metals using a graphene monolayer
… is to incorporate graphene layers in composite materials. Harnessing the high stiffness, intrinsic strength as well as transport properties of graphene in its composites requires the combination of high-quality graphene having low defect density, and the precise control of the …
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Scalable Micro/Nanostructured Surfaces for Thin-Film Condensation Heat Transfer Enhancement in Steam Power Plants
… achieved by sandwiching a thin layer of porous metal wick between a hydrophobic membrane and the condenser surface to confine the condensed liquid, forming a thin liquid-metal composite film that significantly improves the effective thermal conductivity of the condensate-filled porous media. In …
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Design and Development of a Bio-inspired Robotic Jellysh that Features Ionic Polymer Metal Composites Actuators
… 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 …
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