Lighter weight fiber/metal pressure vessels using carbon overwrap

1986 ◽  
Author(s):  
E. MORRIS ◽  
M. SEGIMOTO ◽  
V. LYNN
Keyword(s):  
Pressure Vessels ◽  
Fiber Metal ◽  
Metal Pressure

scholarly journals From first concepts to Diasonograph: The role of product design in the first medical obstetric ultrasound machines in 1960s Glasgow

Ultrasound ◽  
2020 ◽  
Vol 28 (3) ◽  
pp. 187-195
Author(s):  
Alastair S Macdonald
Keyword(s):  
Military Service ◽  
Pressure Vessels ◽  
Innovative Technology ◽  
Obstetric Ultrasound ◽  
Ultrasound Technology ◽  
Design Expertise ◽  
Witness Statements ◽  
Metal Pressure ◽  
Early Engineering

In the late 1950s and early-to-mid-1960s, Glasgow led the world in the development of diagnostic obstetric ultrasound technology, the result of fortuitous collaboration between key individuals advancing the application of an industrial technology. Originally used to detect flaws in metal pressure vessels, the obstetrician Ian Donald, during his military service, reflected on how ultrasound could benefit his own field. Donald involved the engineer Tom Brown to tackle the technical challenges. Brown, in turn, employed a young graduating industrial designer, Dugald Cameron, to address the design, aesthetic and ergonomic aspects of these early engineering prototypes. While previous accounts of these developments have rightly celebrated the medical, technical engineering and imaging achievements of this innovative technology, the discussion of the role of the creative design expertise which addressed serious ergonomic, aesthetic and production manufacturing shortcomings of the first prototypes has been less coherent. This article relates, through key drawings, extracts from witness statements and discussions with Cameron himself, the key design decisions and features resulting in the Sundén and Diasonograph machines, the latter being the world’s first commercial production-series obstetric ultrasound machine, deployed in Glasgow hospitals and beyond.

scholarly journals Modeling of the Large Deformation and Rupture of a Metallic Plate Subjected to Explosive Loading

2008 ◽  
Author(s):  
Benjamin Daudonnet ◽  
Fre´de´ric Mercier ◽  
Krzysztof Woznica
Keyword(s):  
Large Deformations ◽  
Numerical Study ◽  
Dynamic Pressure ◽  
Pressure Vessels ◽  
Dynamic Responses ◽  
Pressure Loading ◽  
Static Loads ◽  
Metal Plates ◽  
Metal Pressure ◽  
Fragment Production

Thin walled metal pressure vessels or pipes commonly used in industry can burst under certain circumstances: as a result, the pressure envelope may undergo large deformations, which may eventually lead to a rupture. The response of these vessels to static and quasi-static loads is relatively well-understood but their response to highly dynamic pressure loading conditions is not. This paper describes a numerical study of the response of circular metal plates to the dynamic loads produced by hydrogen-oxygen explosions. In this study, a range of dynamic responses and rupture criteria models are considered and compared with the results of experiments. The ability of MSC MARC software to model the rupture phase and, in some cases, the post-rupture phase (i.e., fragment production) is also discussed.

1250-kilovolt scanning transmission electron microscope

1984 ◽  
Vol 42 ◽  
pp. 624-625
Author(s):  
T. Imura ◽  
S. Maruse ◽  
K. Mihama ◽  
M. Iseki ◽  
M. Hibino ◽  
...  
Keyword(s):  
High Voltage ◽  
Electron Probe ◽  
Scanning Transmission Electron Microscope ◽  
Pressure Vessels ◽  
Practical Applications ◽  
Voltage Generator ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
New Applications ◽  
High Voltage Generator

Ultra high voltage STEM has many inherent technical advantages over CTEM. These advantages include better signal detectability and signal processing capability. It is hoped that it will explore some new applications which were previously not possible. Conventional STEM (including CTEM with STEM attachment), however, has been unable to provide these inherent advantages due to insufficient performance and engineering problems. Recently we have developed a new 1250 kV STEM and completed installation at Nagoya University in Japan. It has been designed to break through conventional engineering limitations and bring about theoretical advantage in practical applications.In the design of this instrument, we exercised maximum care in providing a stable electron probe. A high voltage generator and an accelerator are housed in two separate pressure vessels and they are connected with a high voltage resistor cable.(Fig. 1) This design minimized induction generated from the high voltage generator, which is a high frequency Cockcroft-Walton type, being transmitted to the electron probe.

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