Safety Assessment Of Composite Cylinders For Gas Storage By Statistical Methods
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Safety Assessment Of Composite Cylinders For Gas Storage By Statistical Methods
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Author : Georg W. Mair
language : en
Publisher: Springer
Release Date : 2017-08-10
Safety Assessment Of Composite Cylinders For Gas Storage By Statistical Methods written by Georg W. Mair and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-08-10 with Technology & Engineering categories.
Featuring a detailed analysis of current approval requirements and the relevant safety assessment methods for gas cylinders in general and with main focus on composite cylinders for storing compressed natural gas and hydrogen, this book demonstrates how current regulations and standards limit the ability to reduce cost and weight. Based on this data, it then highlights the potential offered by the proposed approval procedure based on probabilistic safety assessment After addressing the economic potential of probabilistic safety assessments, the book details working procedures and improving cycles and (slow) bursts as methods for assessing residual strength. It then discusses methods for statistically evaluating test data, as well as sample- size and distribution-character considerations. A definition of sample strength is elaborated in terms of the performance sheets developed by the author. On this basis, it discusses safety as a property of service life and interpreted as an issue of degradation, and explores aspects of artificial aging for simulating the end-of-life reliability level. Lastly, the book considers control and inspection aspects: quality of production, degradation prediction using destructive sample tests parallel to operation, retesting periods and correcting for under- and overestimates of safe lifetime. Presented in schematic diagrams, illustrations and tables, this information enables manufacturers and operators to use this new approach in practice and supports the improvement of current regulations and standards.
Safety Standards And Inspection Techniques For Natural Gas Composite Cylinders
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Author : Webster, Craig
language : en
Publisher: [Montréal] : Transportation Development Centre
Release Date : 1999
Safety Standards And Inspection Techniques For Natural Gas Composite Cylinders written by Webster, Craig and has been published by [Montréal] : Transportation Development Centre this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with categories.
Safety Standards And Inspection Techniques For Natural Gas Composite Cylinders
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Author :
language : en
Publisher:
Release Date : 1999
Safety Standards And Inspection Techniques For Natural Gas Composite Cylinders written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with categories.
Beitrag Zur Analyse Des Eigenspannungsverhaltens Von Composite Hochdruckspeichern Mit Metallischem Liner
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Author : John, Sebastian
language : de
Publisher: Universitätsverlag der TU Berlin
Release Date : 2021-01-13
Beitrag Zur Analyse Des Eigenspannungsverhaltens Von Composite Hochdruckspeichern Mit Metallischem Liner written by John, Sebastian and has been published by Universitätsverlag der TU Berlin this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-01-13 with Technology & Engineering categories.
Bei der Auslegung von Hochdruckspeichern kommen, auf Grund ihrer hohen spezifischen Festigkeit, vermehrt Faserverbundwerkstoffe zum Einsatz. Durch eine hohe Streuung von Material- und Produktionsparametern sowie unterschiedlichster Belastungsszenarien in der Anwendung gestaltet sich jedoch eine Aussage über die Lebensdauer als auch eine Festlegung sinnvoller Prüffristen als schwierig. Die angefertigte Arbeit soll dazu beitragen, künftig genauere Aussagen über das Alterungs- und Beanspruchungsverhalten tätigen zu können. Im Fokus der Untersuchungen steht ein Behälterdesign, bestehend aus einem metallischen Liner und einem kohlenstofffaserverstärkten Kunststoffverbund (Typ III), wobei die Lebensdauer maßgeblich durch die Lastwechselfestigkeit des metallischen Liners und dem darin vorherrschenden Eigenspannungszustand bestimmt wird. Durch eine alterungsbegleitende Eigenspannungsanalyse wird angestrebt, unter Einsatz eines Betriebsfestigkeitsmodells, verbesserte Aussagen zur Lebensdauerabschätzung von Typ III-Behältern geben zu können. Kernstück der Untersuchungen bildete ein Prüfprogramm zur künstlichen Alterung von Typ III Atemluftbehältern, worin Änderungen des Eigenspannungszustandes kontinuierlich erfasst und analysiert wurden. Im Rahmen von Vorversuchen und Simulationen konnten mechanische Lastspitzen ermittelt sowie das beanspruchungsbedingte Bauteilverhalten untersucht werden. Weiterhin wurden die einer Eigenspannungsmessung zu Grunde liegenden Messgrößen definiert, entsprechende Messverfahren abgeleitet und getestet. Schwerpunkt lag dabei auf der Entwicklung eines zerstörungsfreien Messverfahrens auf Grundlage einer experimentellen Modalanalyse. Bei der Analyse von Behältern im Neuzustand wurde zunächst die Höhe des initialen Eigenspannungszustandes und die fertigungsbedingte Streuung erfasst. Weiterhin wurden real gealterte Behälter untersucht, wobei im Vergleich eine deutlich geringere Eigenspannung nachgewiesen wurde. Prüfbegleitend zum Programm der künstlichen Alterung wurde das Eigenspannungs-, Material- und Verformungsverhalten einer Vielzahl von Prüfmustern untersucht. Eine Auswertung der Daten führt zu dem Schluss, dass bei den künstlich gealterten Behältern ein Anstieg der Eigenspannung zu verzeichnen ist. Das erfasste Eigenspannungsverhalten wurde im Folgenden in ein erarbeitetes Betriebsfestigkeitsmodell implementiert. Durch einen Abgleich mit experimentell ermittelten Lastwechselfestigkeiten wurde die Genauigkeit des Modells verifiziert. Die Nachstellung verschiedener Belastungsszenarien zeigt, dass durch die Berücksichtigung einer über der Lebensdauer veränderlichen Eigenspannung die Anzahl ertragbarer Lastwechsel bis zum Versagen sowie damit verbundene Überlebenswahrscheinlichkeiten mit einer erhöhten Genauigkeit abgeschätzt werden können. When designing high-pressure vessels, the use of fibre reinforced plastics becomes of increasing importance due to their high specific strength properties. However, a high variation in material properties and manufacturing parameters as well as variable load scenarios during service life; make it very difficult to give accurate lifetime predictions and to define reasonable inspection periods. The aim of this work is to get detailed information on the residual stress behaviour in the context of the presented light-weight structure aging process. The research of this work focuses on pressure vessels which consist of an inner aluminium liner surrounded by carbon fibre reinforced plastics (type III). The lifetime of the structure is limited by the load cycle sensitivity of the metal and its residual stress condition. To be able to give more accurate lifetime predictions in the future, a lifetime analysis of residual stresses is executed to deliver input data for an appropriate structural durability model. The central point of this research is an artificial aging testing program of type III pressure vessels, during which changes in residual stress conditions are measured and analysed continuously. In the beginning, mechanical peak loads as well as load-structure behaviour are obtained through preliminary tests and simulations. Next, for residual stress measurements, the underlying parameters had to be determined and tested. A focus is set on the development of a non-destructive measurement method based on an experimental modal analysis. Through experimental studies, the intensity and scatter of the initial residual stress condition of manufactured pressure vessels was obtained first. Then a significantly reduced residual stress condition was obtained when measuring 15-year-old specimen. Accompanying the artificial aging program, changes of residual stresses, altered material characteristics and strain behaviour of the tested structures were monitored. According to measurement results, an increased state of residual stresses due to artificial aging was determined. In a last step, the captured residual stress behaviour was implemented into a developed structural durability model. The used analytical model was verified by the number of load cycles until failure which have been obtained experimentally. By simulating cases of various load conditions, it is shown that the accuracy of lifetime prediction can be increased when considering variable states of residual stresses.
Report Of The Gas Cylinders Research Committee
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Author : Great Britain. Department of Scientific and Industrial Research. Gas Cylinders Research Committee
language : en
Publisher:
Release Date : 1921
Report Of The Gas Cylinders Research Committee written by Great Britain. Department of Scientific and Industrial Research. Gas Cylinders Research Committee and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1921 with categories.
Investigation Of Vehicle Cylinder Safety
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Author : C. T. L. Webster
language : en
Publisher:
Release Date : 1993
Investigation Of Vehicle Cylinder Safety written by C. T. L. Webster and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Gas cylinders categories.
Hoop Wrapped Composite Internally Pressurized Cylinders
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Author : John A. Walters
language : en
Publisher: Wiley-Blackwell
Release Date : 2003
Hoop Wrapped Composite Internally Pressurized Cylinders written by John A. Walters and has been published by Wiley-Blackwell this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with Gas cylinders categories.
This short monograph and timely practitioner guide offers a comprehensive theoretical background and a design procedure for hoop-wrapped, composite gas cylinders. It gives a fundamental insight into the effects of process variables and how they interact, allowing a predictive approach to design and enabling test results to be assessed in a more meaningful way. The theory described is also generally applicable to all kinds of internally pressurized cylindrical pressure vessels and pipes where hoop reinforcement is an integral part of the design. Designing high-pressure gas cylinders using composites is a relatively new and rapidly developing technology, exploiting recent advances in high-strength lightweight synthetic fibres. Traditionally, only metals have been used, but clearly weight is a major consideration in the efficiency of gas cylinders. Lightweight composite cylinders offer considerable advantages over heavier all-metal alternatives, provided concerns over safety can be allayed. Manufacture of composite gas cylinders has relied primarily on costly design by testing to ensure that stringent safety standards are met. With new European and International Standards backed by recently introduced legislation Hoop-wrapped Composite Internally Pressurized Cylinders Development and Application of a Design Theory provides the industry with a much-needed, reliable, and transparent methodology for the design of hoop-wrapped, composite gas cylinders.
Gas Engineering And Management
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Author :
language : en
Publisher:
Release Date : 1991
Gas Engineering And Management written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Gas manufacture and works categories.
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1992
Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Aeronautics categories.
Applied Mechanics Reviews
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Author :
language : en
Publisher:
Release Date : 1948
Applied Mechanics Reviews written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1948 with Mechanics, Applied categories.