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 478 for “"Structural integrity"”.
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Ductile fracture and structural integrity of pipelines & risers
… in the offshore and onshore environment. The structural integrity and fracture control of pipes, which are major components for the exploration, production and transportation of fossil fuels have been the subject of extensive analysis in the past decade using classical fracture mechanics …
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Study on structural integrity of welded components using the LMM
… plant industry, give paramount importance to structural integrity assessments due to the obvious catastrophic effect an unfortunate failure might cause. The presence of welds increases the susceptibility of premature failure within the structures. Hence identifying the structural response of …
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Structural Integrity of Polymer Matrix Composites Exposed to Fire Conditions
Polymer matrix composites (PMC's) perform well under many loading conditions and situations. Exposure of PMC's to fire is a concern due to their inherent material degradation at elevated temperatures. The elevated temperature response of PMC's to combined thermal and mechanical loads are especially …
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Monitoring the structural integrity of packaging materials subjected to sustained random loads
… technique for continuously monitoring the structural integrity of the systems during laboratory based vibration testing.
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Structural integrity assessment of engineering components under cyclic loading at high temperature
Structural integrity assessment is essential for many industries, especially for industries which have machinery components and structures in operation at high temperature. Nuclear power plant industry is one of a good example, and they have planned to introduce the very high temperature reactor to …
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Residual stress measurement and structural integrity evaluation of SLM Ti-6Al-4V
The constant drive toward cleaner, more powerful and more efficient jet turbines in the aerospace industry has narrowed the gap between the aircraft performance envelope requirements and the material limits. The most advanced turbine engines are incredibly complex in design and the weight-saving …
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The effect of implants on the structural integrity of graphite/epoxy laminates
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1992.
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Assessing Structural Integrity using Mechatronic Impedance Transducers with Applications in Extreme Environments
… research reviews and extends the impedance-based structural health monitoring technique in order to detect and identify structural damage on various complex structures. The basic principle behind this technique is to apply high frequency structural excitations (typically higher than 30 kHz) …
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Numerical Investigation of the Structural Integrity of Silicon Carbide and Copper Heat Sink
… and examined numerically using ANSYS Fluent and Structural simulations assuming a Silicon (Si) heater. The heat sink geometry considers a conventional rectangular straight microchannel (RSMC) heat sink with the Silicon heater resting atop the heat sink in every case. Microchannel heat sinks …
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Design for Additive Manufacturing: Simultaneous Optimization of Structural Integrity and Minimal Support Structures
<p>This dissertation addresses two core challenges limiting the widespread application of Topology Optimization (TO): the difficulty in fabricating its complex designs, especially for Additive Manufacturing (AM), and its significant computational costs. It develops a unified design framework that …
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Factors Affecting the Structural Integrity of Wood-Based Composites: Elevated Temperature and Adhesive Bonding
This study focuses on factors that affect the structural integrity of wood-based composites. Wood-based composites exposed to fire may decompose due to the elevated temperatures, resulting in a degradation in performance. Thermal modelling can only predict the structural integrity of construction …
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MICRO-STRUCTURAL CHARACTERISTICS OF CONCRETE IN RELATION TO ITS STRUCTURAL INTEGRITY, WITH APPLICATION IN ACOUSTIC EMISSION
… emission characteristics to the inherent micro-structural behaviour of the bulk concrete material. Reasons which are attributed to this current state of research development include the very high cost of the acoustic emission monitoring equipment, many technical difficulties associated with the …
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The effects of manufacturing on the structural integrity of Gr/PEEK composite parts by Thomas Ackley Wilson.
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1990.
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The influence of acute, chronic and lifelong hypoxia on the functional and structural integrity of the neurovascular unit
… exposure to hypoxia on the functional and structural integrity of the neurovascular unit (NVU). <br/><br/><b>Methods.</b> <i>Experimental Study 1: </i>In a randomised, single-blind cross-over design, 12 healthy, physically active male participants (age, 23 ± 2 yrs; BMI, 25 ± 4 …
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Structural Integrity of Eyes Diagnosed with Amblyopia. The measurement of retinal structure in amblyopia using Optical Coherence Tomography.
… on more detailed examination, exhibit subtle structural defects of the eye. Presently, the magnitude of this problem is unknown. The aim of this study was to establish the prevalence of subtle retinal/optic nerve head defects in eyes diagnosed with amblyopia, to distinguish between possible …
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Polymer-Derived Ceramic Coatings for Stress and Corrosion Resistance in Stainless Steel: Optimization of Thermal Stability and Structural Integrity
… corrosion resistance, thermal stability, and structural integrity of stainless steel in harsh environments. Using perhydropolysilazane (PHPS) and its derivatives, various coating compositions and pyrolysis conditions were optimized to tailor their microstructure and performance. The first part …
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An investigation of casing structural integrity in shale gas horizontal wells during hydraulic fracturing using FEA and machine learning algorithms.
… using two simulation scenarios for casing structural integrity in both radial and axial configurations under the mechanics of a combine system - casing, cement and formation rock. There was then a detailed novel study on casing structural integrity using both FEA and machine learning. This …
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Multi-body dynamic and finite element modeling of ultra-large dump truck - haul road interactions for machine health and haul road structural integrity
… design. This study forms a basis for designing structurally competent haul roads and improving truck health"--Abstract, page iii.</p>
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Structural Assessment of Glued-Laminated Timber Columns Subjected to Real Fires
… investigates the performance and post-fire structural integrity of glued-laminated (glulam) columns when exposed to real fires. The primary objective of the Mass Timber Demonstration Fire Test Program (MTDFTP) in Ottawa was to conduct large-scale fire tests to explore construction fire …
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Novel Application of Nondestructive Testing to Evaluate Anomalous Conditions in Drilled Shafts and the Geologic Materials Underlying Their Excavations
… particularly with respect to their structural integrity and geotechnical capacity. Due to their inaccessibility, non-destructive testing (NDT) techniques have received much attention for drilled shaft quality control. However, there are limitations in the NDT tools currently used for …
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