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 16 of 16 for “"Inflatable Structures"”.
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Characterizing the mechanical properties of drop stitch inflatable structures
… the mechanical properties of drop stitch inflatable structures with specific reference to inflatable stand up paddleboards. A sample of drop stitch material was fabricated and simple beam bending tests were performed at different pressures. This data was then used to invalidate a developed …
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Pneumatically Deployed Non-Pressurized Lunar Structures: A Comparative Analysis of Rigid and Inflatable Structures
… role of pneumatically deployed unpressurized structures in enhancing human and robotic exploration capabilities on the lunar surface, with a focus on their design and application for future missions under NASA’s Artemis program and beyond. It provides a comprehensive analysis comparing rigid …
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Exploration of the Mechanical Properties of both Ridged and Inflated Drop Stitch Fabric Material
… such as ship construction, modular buildings, inflatable structures, aquatic vehicles, sporting goods and temporary field equipment installations. The goal of testing is to improve the understanding of the mechanical properties, which can aid in application development for structural …
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Analysis, Design, and Experimentation of Beam-Like Structures
… altitudes. One such approach is the use of an inflatable High Altitude Aerial Platform (HAAP). In the presented work, such periodically supported beam-like structures are analyzed using various mathematical models primarily modeling them as an equivalent beam using one-dimensional theories. The …
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Advancing Sensing and Structural Health Monitoring of Non-Conventional Space Structures
… that have received significant attention are inflatable habitats and additively manufactured structures; however, challenges remain in their characterization, validation, and long-term monitoring. This dissertation investigates methods to improve the testing and sensing of these …
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A two-dimensional fluid-structure coupling algorithm for the interaction of high-speed flows with open shells
The design of future light aerospace structures will require numerical tools to accurately describe the strongly coupled dynamics of the interactions between a light structure and a flow surrounding it. Specific examples include inflatable structures and parachutes used as deceleration devices …
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Vibration Analysis and Control of an Inflatable Toroidal Satellite Component Using Piezoelectric Actuators and Sensors
Inflatable structures have been a subject of renewed interest in recent years for space applications such as communication antennas, solar thermal propulsion, and entry/landing systems. This is because inflatable structures are very lightweight and on-orbit deployable. In addition, they have high …
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Passive, Self-Healable, Dielectric Elastomers for Structural Health Monitoring
… objects represent a significant danger to inflatable structures. This work seeks to synthesize and fabricate a self-healable, passive, dielectric elastomer impact sensor for structural health monitoring on inflatable space structures subject to impact by micrometeoroids and orbital debris. …
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Experiments on the Response of Arch-Supported Membrane Shelters to Snow and Wind Loading
For many years, inflatable structures and membrane enclosed structures have proved useful for a variety of purposes, such as athletic pavilions, exhibition spaces, coliseums, and kiosks. More recently, structures that combine highly pressurized inflatable arch members with light fabric membrane …
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Development and Characterization of Piezoresistive Nanocomposites for Sensing Applications
… for damage sensing in space applications for inflatable habitat under Micrometeoroid and Orbital Debris (MMOD) impact, the sensitivity of the sensor with 3 mm impact holes is evaluated using four point probe electrical resistivity measurements. An array of these sensors when sandwiched between …
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Hypervelocity Impact Analysis of Hybrid Nanocomposite Sensors for Inflatable Space Structures
… human habitation can be made safe and easy with inflatable space habitats (Litteken, 2017). One of the biggest threats faced by these structures in outer space is impact damage by micrometeoroid orbital debris (MMOD) traveling at velocities as high as 15 km/s (Lemmens, Krag, Rosebrock, & …
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Active Dynamic Analysis and Vibration Control of Gossamer Structures Using Smart Materials
… for optical systems and surfaces. Lightweight, inflatable structures, otherwise known as gossamer structures, are smaller, lighter, and more flexible than current satellite technology. Unfortunately, little research has been performed investigating cost effective and feasible methods of dynamic …
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Finite Element Modeling and Active Control of an Inflated Torus Using Piezoelectric Devices
… reduce the launch size and mass of satellites, inflatable structures, also known as gossamer structures, are being considered. Inflatable space-based structures are susceptible to vibration disturbance due to their low stiffness and damping. This thesis discusses the structural dynamics and …
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Development of Novel Eddy Current Dampers for the Suppression of Structural Vibrations
… has been shown in the development of ultra large inflatable structures that can be packaged inside the shuttle bay and then deployed once in space. To facilitate the packaging of the inflated device in its launch configuration, most structures utilize a thin film membrane as the optical or antenna …
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Macro-Fiber Composites for Sensing, Actuation and Power Generation
… extremely flexible, allowing it to be bonded to structures that have curved surface without fear of accidental breakage or additional surface treatment as is the case with monolithic piezoceramic materials. Additionally the MFC uses interdigitated electrodes that capitalize on the higher d33 …
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Development and Applications of a Flat Triangular Element for Thin Laminated Shells
… two main applications involving large flexible structures. The first application is the control of thermal deformations of a spherical mirror segment, which is a segment of a multi-segmented primary mirror used in a space telescope. The feasibility of controlling the surface distortions of the …