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 49 for “"aerospace structures"”.
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Digital material aerospace structures
… and performance of digital materials in aerospace structures in three areas: (1) a morphing wing design that adjusts its form to respond to different behavioral requirements; (2) an automated assembly method for truss column structures; and (3) an analysis of the payload and structural …
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Thermal Characterization of Complex Aerospace Structures
Predicting the performance of complex structures exposed to harsh thermal environments is a crucial issue in many of today's aerospace and space designs. To predict the thermal stresses a structure might be exposed to, the thermal properties of the independent materials used in the design of the …
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An Automated Procedure for the Optimization of Aerospace Structures
Made available in DSpace on 2014-12-10T23:36:43Z (GMT). No. of bitstreams: 1 7219821.pdf: 6197770 bytes, checksum: e0fbeb1b41a4630a39de855dc4ee3961 (MD5) Previous issue date: 1972
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Multiscale characterization of thermoacoustic response and fatigue failure of aerospace structures
… as it has been seen to induce failure of thin aerospace panels in modes that had not been previously accounted for. These new and unaccounted for failure modes are attributed to the extreme and coupled loading conditions of the thermoacoustic environment prevalent in hypersonic flight. Prior …
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Damage detection in civil and aerospace structures with fiber optic sensors
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1995, and Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1995.
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Damage Control Measures in Composites: Focus on Damage Tolerance of Aerospace Structures
… strategies and structural evaluation in aerospace composites by offering refined tools for early detection of BVID-induced damage.</p>
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On the development of a population-based SHM strategy for aerospace structures
L'abstract è presente nell'allegato / the abstract is in the attachment
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Aerothermal and aeroelastic response prediction of aerospace structures in high-speed flows using direct numerical simulation
… used to examine the fluid-structural response of aerospace structures in high-speed flows. The method is applied to two cases: one involving a fluid-thermal interaction problem in a hypersonic flow and the other a fluid-structure interaction study involving a turbulent boundary layer and a …
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Methodology for innovative health monitoring of aerospace structures using dynamic response measurements and advanced signal processing techniques
… system for Structural Health Monitoring (SHM) of aerospace composite structures based on dynamic strain measurements in order to identify in an exhaustive way the structural state condition. Fiber Bragg Grating (FBG) optical sensors will be used for the recording of dynamic strain measurements …
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Fast methods for scheduling with applications to real-time systems and large-scale, robotic manufacturing of aerospace structures
Across the aerospace and automotive manufacturing industries, there is a push to remove the cage around large, industrial robots and integrate right-sized, safe versions into the human labor force. By integrating robots into the labor force, humans can be freed to focus on value-added tasks (e.g. …
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Thermoelastic control of adaptive composites for aerospace applications using embedded nitinol actuators
Aerospace structures have stringent pointing and shape control requirements during long-term exposure to a hostile environment with no scheduled maintenance. This makes them excellent candidates for a smart structures approach as current passive techniques prove insufficient. This study …
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Structural health monitoring of bolted joints using thermal contact resistance and ultrasonic signals
… for early damage detection and recognition in structures. Using advances from communication and sensing technology in the past two decades, various SHM systems have been developed to ensure infrastructure safety. Bolted joints in most aerospace structures are useful components that enable easy …
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Guided Wave Structural Health Monitoring with Environmental Considerations
Damage detection in mechanical and aerospace structures is critical to maintaining safe and optimal performance. The early detection of damage increases safety and reduces cost of maintenance and repair. Structural Health Monitoring (SHM) integrates sensor networks and structures to autonomously …
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Aerospace automated drilling and fastening technology product selection framework
Ascent Aerospace is a global tooling and factory automation supplier for the Aerospace industry. Ascent's customers are typically introducing automation for the first time, or have already introduced automation to their production systems and are wary of its challenges. Choosing the appropriate …
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Nonlinear analysis of topology-optimized scissor-like elements during deployment and structural performance analysis
Deployable structures, known for their flexibility and adaptability, have gained popularity in applications such as emergency shelters, aerospace structures, and sports facility roofs. One of many commonly used deployable mechanisms is Scissor-Like Elements, which is generally made from two …
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Advancing Sensing and Structural Health Monitoring of Non-Conventional Space Structures
… 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 non-conventional aerospace structures through the use of …
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Impact Simulation and Analysis of Sandwich Structures
… that may cause catastrophic results. Several aerospace structures have been used to resist or absorb energy in the occasion of impact. Among these, a sandwich structure has advantages with high stiffness, strength to weight ratio, and its relatively cheap cost. However, finding the impact …
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Durability testing of an aircraft structural health monitoring system
… to systems capable of continuously monitoring structures for damage. Aerospace structures have one of the highest payoffs for SHM systems because damage can lead to catastrophic and expensive failures. Prior work in SHM has focused on damage detection methods and sensor optimization, however, …
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Micromechanical models of delamination in aluminum-lithium alloys
… lighter, stiffer, and tougher than conventional aerospace aluminum alloys. Replacing conventional aluminums with Al-Li could substantially decrease the weight and cost of aerospace structures. However, Al-Li alloys often fracture intergranularly via a mechanism called delamination cracking. While …
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