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Results for “PRESSURE VESSELS”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Exploring Life Extension Opportunities of High-Pressure Hydrogen Pressure Vessels at Refueling Stations.
Abstract not provided.
Exploring life extension opportunities of high-pressure hydrogen pressure vessels at refueling stations_Abridged.
Abstract not provided.
Development of C-Ring Geometry to Explore Fatigue Crack Extension and Verification in High-Pressure Vessels.
Abstract not provided.
Developing Technologies for Composite Overwrapped Pressure Vessels (COPV) Comparing Traditional Inspections to Advanced 3-D Rendering Techniques
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Review of Shock, Vibration, and Other Tests for Type IV Hydrogen Composite Pressure Vessels for Rail Use
Requirements specific to hydrogen rail transportation and its unique components are currently not well represented in safety codes and standards. Notably, one of the most important components of the system, the hydrogen storage vessel, may be subject to entirely different shock and vibration conditions compared to hydrogen tanks on road vehicles. This report focuses on how composite hydrogen tanks are tested for performance and how this may relate to these tanks being used on rail systems. The shock and vibration testing procedures that are relevant for hydrogen composite tanks used for rail applications have been identified, as well as some general testing requirements for hydrogen tanks and composite tanks.
NMSU Senior Design Poster - 3D Printed Polymer Welding for Pressure Vessels
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Juncture Stress Fields in Multicellular Shell Structures. Volume VI - Analysis of Multicellular Propellant Pressure Vessels by the Stiffness Method Final Report
Matrix algebra solution, using coordinate systems transformations, to boundary value problem for structures composed of shell elements
A study of weldments and pressure vessels made of HY-150 steel plates Final report, 8 Nov. 1965 - 9 Dec. 1966
Gas tungsten arc method for optimal weldments in steel plates for large rocket motor case
Investigation of the flaw growth characteristics of 6Al-4V titanium used in the Apollo spacecraft pressure vessels
Failure analysis of flaw growth characteristics of 6Al-4V titanium forgings used in Apollo spacecraft propellant tanks
Residual stress measurement of titanium - 6Al-4V alloy pressure vessel material
Diffractometer and X ray stress measurements of directional elastic residual stresses on surfaces of 6Al-4V titanium alloy weldments and parent metal
Improved epoxy resin for constructing cryogenic filament-wound pressure vessels
Mechanical properties of new resin at cryogenic temperatures are substantially improved over similar composite structures utilizing conventional resins, while properties at ambient temperature are identical to conventional resin composites.
Optimum pressure vessel design based on fracture mechanics and reliability criteria
Optimization design methods for spacecraft structural systems and subsystems
Subcritical crack growth of selected aerospace pressure vessel materials
This experimental program was undertaken to determine the effects of combined cyclic/sustained loads, stress level, and crack shape on the fatigue crack growth rate behavior of cracks subjected to plane strain conditions. Material/environment combinations tested included: 2219-T87 aluminum plate in gaseous helium, room air, and 3.5% NaCl solution at room temperature, liquid nitrogen, and liquid hydrogen; 5Al-2.5 Sn (ELI) titanium plate in liquid nitrogen and liquid hydrogen and 6AL-4V (ELI) STA titanium plate in gaseous helium and methanol at room temperature. Most testing was accomplished using surface flawed specimens instrumented with a clip gage to continuously monitor crack opening displacements at the specimen surface. Tapered double cantilever beam specimens were also tested. Static fracture and ten hour sustained load tests were conducted to determine fracture toughness and apparent threshold stress intensity values. Cyclic tests were performed using sinusoidal loading profiles at 333 MHz (20 cpm) and trapezoidal loading profiles at both 8.3 MHz (0.5 cpm) and 3.3 MHz (0.2 cpm). Data were evaluated using modified linear elastic fracture mechanics parameters.
A review of the state-of-the-art of the non-destructive testing of flight pressure vessels
The design of flight vessels is based on a nominal stress requirement and a fracture mechanics approach, and optimization of the weight of the vessel is based on the smallest size defect that can be detected with a high degree of confidence. The wide variety of metals used for fabrication, and the different defects that may be present in them at every stage, up to completion of the vessel, is described. Techniques currently being used for NDT are described along with their advantages, limitations and limits of detectability at high levels of confidence. Techniques considered for use in the future to improve the limits of the minimum flaw size that can currently be detected include the Delta Scan and Acoustic Emission techniques. The construction of space vessels for use in the future has been modified to reduce the presence of critical defects and so to improve the cost effectiveness of projected NDT requirements.
Explosive-seam welding seals large pressure vessels
Simple single-step operation hermetically seals aluminum, brass, steel, copper, and titanium vessels.