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inadvertent system failure

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780019
EISBN: 978-1-62708-268-6
... intermittent and inadvertent system failures. failure analysis inadvertent system failure intermittent system failure A SYSTEM IS A COMBINATION of parts, subassemblies, procedures, and people that form an entity capable of accomplishing specific functions when commanded to do so. It may...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780035
EISBN: 978-1-62708-268-6
... , a system failure was defined as a system not doing something when it is supposed to do it or doing something when it is not supposed to. An inadvertent launch of a nuclear missile certainly falls into this latter category. A nuclear missile launch involves thousands of parts and numerous electrical...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270003
EISBN: 978-1-62708-301-0
... factory with extensive damage to the community. As the complexity of our technological systems increases, so do the possible catastrophic consequences of the failure. For understanding failures and their prevention, there is a need for the application of many disciplines of science and technology...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780057
EISBN: 978-1-62708-268-6
... Abstract Quantifying a fault-tree analysis is a useful tool for assessing the most likely causes of a system failure. This chapter addresses fault-tree analysis event probabilities and ranking of failure causes based on these probabilities. Failure rates, failure-rate sources, probability...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780047
EISBN: 978-1-62708-268-6
... Abstract This chapter covers special fault-tree analysis topics, including the use of transfer symbols, INHIBIT gates, sequential AND gates, state-of-the-part versus state-of-the-system considerations, and the fault tree to identify redundancy-defeating failures. INHIBIT gates sequential...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780147
EISBN: 978-1-62708-268-6
... Abstract In some cases, the failure analysis team finds that all components meet their requirements, the system was properly assembled, and it was not operated or tested in an out-of-specification manner, yet it still failed. When this occurs, the only conclusion the failure analysis team can...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270005
EISBN: 978-1-62708-301-0
... of forces, whether they are by monotonic or repetitive loads. All service failures can ultimately be attributed to defects of various types, introduced mostly inadvertently in the various stages of manufacture of the component. In the following section, some potential causes of service failures are given...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430343
EISBN: 978-1-62708-253-2
..., inadvertent use of acids and caustic chemicals can cause damage to the boiler. The presence of either of these chemicals can cause corrosion of the boiler tubes. The failure of any process equipment such as heat exchangers and pumps is normally a source for ingress of oils and process chemicals...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780081
EISBN: 978-1-62708-268-6
... that because the system had been operating without failure in the past, something must have changed. In some cases, this is true; in other cases, it is not. This chapter targets areas that determine if a change occurred and if the change induced the failure. This is referred to as change or “what’s different...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780131
EISBN: 978-1-62708-268-6
... in areas where the liquid or gas migrates. Leaks can induce failure to function or inadvertent function in hydraulic or pneumatic logic mechanisms. Leaks can result in a loss of pressure in backup systems. Leaks can result in gas or liquid mixing where none is allowed. Leaks can create stress...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780109
EISBN: 978-1-62708-268-6
... Abstract This chapter focuses on common failure characteristics exhibited by mechanical and electrical components. The topic is considered from two perspectives: one possibility is that the system failed because parts were nonconforming to drawing requirements and another possibility...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110101
EISBN: 978-1-62708-247-1
... to the basic diagnosis tools, discussing their merits for the failure analysis engineer. The article also describes the various requirements and other considerations that typically need to be taken into account to set up a full working scan diagnosis system. It summarizes the principles of design with embedded...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030235
EISBN: 978-1-62708-282-2
... Abstract This chapter focuses on various factors to be considered at design stage to minimize corrosion. It begins by providing information on design considerations and general corrosion awareness. This is followed by a description of several factors influencing materials-component failure...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.aceg.t68410253
EISBN: 978-1-62708-280-8
... Traceability The supplier should implement a date code marking system on each casting for lot traceability. Engineering Test Failure Information and Reaction The supplier shall notify the customer of any release test failure of the product, stopping of the shipments, and any potential for suspect...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.tt2.t51060183
EISBN: 978-1-62708-355-3
...°] T . This assures the reader that the laminate is indeed unsymmetric and that a subscript s was not inadvertently omitted. Components of stress and strain can be transformed from one coordinate system to another. Thus, it is possible to establish the stress-strain relationship in any coordinate...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610001
EISBN: 978-1-62708-303-4
... rupture. Improvement in steel grades Safety procedures established for lifeboats Warning systems established for icebergs Molasses tank failures 1919, 1973 Brittle fracture of the tank as a result of poor ductility and higher loads Design codes for storage tanks developed Consideration given...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250019
EISBN: 978-1-62708-345-4
... system used a mineral oil without antiscuff additives with ISO 100 viscosity. After about 250 h of operation, two gearboxes failed by bending fatigue. The gear tooth profiles were so badly worn that determining the primary failure mode was impossible. Three other gearboxes with less service were selected...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.horfi.t51180061
EISBN: 978-1-62708-256-3
... or symptomatic of a widespread, systemic problem. Chapter 2 presented an example of a fabrication failure that involved a part in the hot gas portion of the Space Shuttle main engine high-pressure oxidizer turbopump. Made from 321 CRES tube in the shape of a ring with multiple small cooling jets welded...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2001
DOI: 10.31399/asm.tb.aub.t61170234
EISBN: 978-1-62708-297-6
... , which depict the iron-rich end of the iron-nickel binary system. Figure 2(a) is the metastable diagram plotting the austenite-to-martensite transformation upon cooling and the martensite-to-austenite reversion upon heating. Figure 2(b) is the equilibrium diagram showing that at higher nickel...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.tt2.t51060137
EISBN: 978-1-62708-355-3
... to further deformation. Thus, the yield stress and the yield strain are not unambiguously quantifiable. Fig. 5 Sources of experimental error in the specimen-machine system Fig. 1 Visualizations of simple viscoelastic systems Fig. 2 Influence of temperature on the nature...