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Showing 1 to 20 of 97 for “"Pressure Vessel"”.
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Stresses and flexibilities for pressure vessel attachments
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1984.
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Impurity Element Diffusion in Pressure Vessel Steels at Reactor Ambient Temperatures
Made available in DSpace on 2017-07-06T18:59:28Z (GMT). No. of bitstreams: 3 Windes_William_E_MS.pdf: 43436192 bytes, checksum: 8e98e131504c7174ac93c74fba83a5e9 (MD5) Windes_William_E_MS_ABS.pdf: 995532 bytes, checksum: 5d8ad92a06071e5b7cac73ba656f8456 (MD5) license.txt: 4813 bytes, checksum: …
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Novel, low-cost, CFRP pressure vessel design for hydrogen fuel cell applications
… of the Carbon Fibre Reinforced Plastic (CFRP) pressure vessel portion of the rocket. The pressure vessel was composed on a long, thin-walled commercial CFRP cylindrical tube that had two Poly Vinyl Chloride (PVC) end caps bonded onto either end with an adhesive. The inside wall of the CFRP tube …
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Analysis of a hybrid composite pressure vessel using multi-scale computed tomography techniques
… four neighbouring breaks were observed in the pressure vessel samples. A correlation between fibre volume fraction and fibre breaks was found, in which higher fibre volume fractions result in higher fibre break densities. No strong correlation was found between the location of matrix damage and …
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Statistical modelling of the transition toughness properties of low alloy pressure vessel steels
… transition toughness of low alloy steels used in pressure vessels is of key importance to establishing the safe operation of a number of structures; of these, the integrity of a nuclear reactor vessel is of greatest concern. The through life toughness of such vessels is a combination of the start …
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Classification of Acoustic Emission Signals from an Aluminum Pressure Vessel Using a Self-Organizing Map
… acoustic emission signals gathered from a pressure vessel made of 2024-T3 aluminum 0.040 inches thick, i.e. thin aluminum sheet. AE waveforms were recorded during fatigue cycling of one pressure vessel using a wide band transducer and a digital oscilloscope connected to a computer. The …
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Hydrogen degradation and microstructural effects of the near-threshold fatigue resistance of pressure vessel steels
Safety of pressure vessels for applications such as coal conversion reactors requires understanding of the mechanism of environmentally-induced crack propagation and the mechanism by which process-induced microstructures as in thick section weldments affect the fatigue resistance of the structure. …
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Towards a unified design-by-analysis solution to pressure vessel nozzle-shell junctions under combined loading
… complex practical cylinder-cylinder junctions in pressure vessels. This is used when the geometrical arrangement is out with the permitted scope of the design-by-rule approaches or when detailed stress information is required as in a fatigue assessment. High-stress concentrations occur on the …
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Effects of Fatigue in the Elastic Regime on the Mechanical Properties of Nuclear Pressure Vessel Steels
Made available in DSpace on 2017-07-06T18:56:02Z (GMT). No. of bitstreams: 3 Riedy_Alexander_W_MS.pdf: 57625324 bytes, checksum: a63828112673c0818a625c2ee346d239 (MD5) Riedy_Alexander_W_MS_ABS.pdf: 941457 bytes, checksum: a3bbb5cf4be77548e913c9b5bf833253 (MD5) license.txt: 4813 bytes, checksum: …
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Design of a Pressure Vessel to Characterize Frictional Ignition of Metals in High-Pressure Oxygen Environments
… to environments that are oxygen-rich, reach high-pressures, and cause the abrasion of rotating parts. Studies have shown that these conditions cause nearly all metals to develop an oxide tribolayer, which initially lubricates the rubbing surface, but later exposes fresh metal to be ignited once it …
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Notched strength analysis of tensile specimens taken from a thick, filament-wound graphite/epoxy pressure vessel
… from a thick, filament-wound composite material pressure vessel (cylinder) was performed by testing tensile coupons with various semi-elliptical surface notches. The strength of specimens with small notches was found to be notch insensitive. The strength of specimens with larger notches depended …
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The design of a reduced diameter Pebble Bed Modular Reactor for reactor pressure vessel transport by railcar
Many desirable locations for Pebble Bed Modular Reactors are currently out of consideration as construction sites for current designs due to limitations on the mode of transportation for large RPVs. In particular, the PBMR-400 design developed by PBMR Pty of South Africa uses an RPV with an outer …
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Magnetic analysis of nuclear pressure vessel steels and other ferromagnetic materials subject to neutron irradiation and heat treatment
… a nondestructive method of monitoring nuclear pressure vessel steel embrittlement during reactor operation. Four kinds of samples, including pressure vessel steel, pure Fe and Ni, Fe-Cu alloys and Charpy surveillance coupons, were examined. An automated magnetic property measuring system was …
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Effects of Fatigue in the Elastic Regime on the Impact Properties of Nuclear Pressure Vessel Steels and Its Relation to Fracture Toughness
Made available in DSpace on 2017-07-06T18:49:10Z (GMT). No. of bitstreams: 3 Canty_Robert_W_MS.pdf: 44893344 bytes, checksum: 36b04769a61e51628aa6cd3ec4b26d75 (MD5) Canty_Robert_W_MS_ABS.pdf: 529441 bytes, checksum: bdae3bda0f7e90e23a00e5d0439f8a81 (MD5) license.txt: 4813 bytes, checksum: …
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A theoretical analysis of the temperature response in a bimetallic, composite geometry, nuclear reactor pressure vessel undergoing a loss-of-coolant accident
… the bimetallic, upper cylindrical region of the pressure vessel, The solution considers spatially and time-varying internal heat generation. The two-dimensional analysis of the problem is begun next. Assuming axisymmetric heat conduction, the steady-state profile, which exists in the pressure …
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Al-Ni Nanofilm Powered Miniature Linear Actuator for Medical Devices
… of a patient. This actuator consists of a small pressure vessel filled with liquid alcohol that undergoes a phase change to gas and generates pressure that can be used to cycle a piston in a drug loaded cylinder. Via exothermic reaction, nanofilm deposits thermal energy into the alcohol filled …
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Single crystal silicon as a macro-world structural material : application to compact, lightweight high pressure vessels
… applications, identification of cellular pressure vessels as a promising wafer-scale silicon device, identification of design criteria for brittle pressure vessels and quantified metrics for a competitive silicon pressure vessel design, identification of DRIE failure mechanisms, …
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Detection and assessment of high temperature hydrogen attack in steel pressure vessels using non-collinear wave mixing
… assessing the level of damage in HTHA affected vessels. This study presents a nondestructive testing approach that is capable of evaluating HTHA damage in pressure vessels made of carbon steels. A strategy of detection involving non-collinear wave mixing of ultrasonic waves and pulse-inversion …
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Development and validation of a conceptual design program for unmanned underwater vehicles
… a resistance module, a battery module, and a pressure vessel module. The final concept design results from an iterative process that considers the displacement, interior volume, and exterior volume of the total UUV system. To validate the proposed design algorithm, the author applied the best …
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