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fail-operational designs

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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
... 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 reach is that it missed something in its analysis or that the design is...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270185
EISBN: 978-1-62708-301-0
... test run, one of them by fatigue and the other by tensile overload. The bolts were experiencing loads in excess of the design loads. The design of the connecting rod system needs to be reviewed. During a test run of a prototype engine, two bolts of one of the connecting rods failed. The bolts were...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.horfi.t51180029
EISBN: 978-1-62708-256-3
... flight, I didn’t care. We all put up with these kinds of process failures every day, ignoring them as long as our lives are not affected. In the second failure category, a component, machine, or process fails to achieve performance criteria such as operating life, operating limits, and specification...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610303
EISBN: 978-1-62708-303-4
... Fail-safe features Durability design or mandated retirement (safe-life approach) Periodic (destructive) inspection by proof testing; repair after failure in proof test (if feasible) Damage tolerance requirements sometimes prescribe the fracture control procedure. For example, commercial...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270115
EISBN: 978-1-62708-301-0
..., investigators concluded that the compressor rotors failed due to stress-corrosion cracking in the dovetail mountings. They also provided recommendations to prevent or mitigate future occurrences. compressor rotors fractography metallography stress corrosion cracking visual examination...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130001
EISBN: 978-1-62708-284-6
... Design , Chapter 2, Handbook of Mechanical Alloy Design , Totten G. , Funatani K. , and Xie L. , Ed., Marcel Dekker Inc. , New York , 2003 3. Totten G. , Narazaki M. , Blackwood R.R. , and Jarvis L.M. , Failures Related to Heat Treating Operations...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910301
EISBN: 978-1-62708-250-1
... occasionally overlooked is the surrounding environment. For example, the instrument tubing at a new facility, built at an existing chemical plant in West Virginia, consisted of a combination of copper (C12200) tubing and yellow brass (C27000) fittings. However, within a few weeks, the fittings had failed by...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110613
EISBN: 978-1-62708-247-1
... , No. 5 , May 2002 . 10.1109/43.998626 17. Visweswariah C. , “ Death, taxes, and failing chips, ” Design Automation Conference ., pp. 343 - 347 , June 2003 . 10.1145/775832.775921 18. Weber M. , “ My head hurts, my timing stinks, and I don’t love on-chip variation...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270019
EISBN: 978-1-62708-301-0
... Abstract This chapter discusses the basic steps of a failure investigation. It explains that the first step is to gather and document information about the failed component and its operating history. It advises investigators to visit the failure site as soon as possible to record damages and...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430149
EISBN: 978-1-62708-253-2
... due to long-term high-temperature exposure above the permissible design limits, resulting in creep damage. The reheater outlet tube of a coal-fired boiler failed by rupture during operation after about 5 years of service. The MOC of the failed tube was A 213 Grade T22 steel. This tube was one end...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030235
EISBN: 978-1-62708-282-2
... (real-world) approaches vary from plant to plant (or component to component) and include: The avoid-failure approach The keep-it-working approach The let-it-fail-then-repair approach Aspects germane to these approaches are summarized in Table 1 ( Ref 29 , 37 ). Table 1 Design...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780171
EISBN: 978-1-62708-268-6
... if the tanker aircraft pilot so commands. The reason is that if the hose fails to rewind, the guillotine mechanism allows the tanker aircraft to land without a fuel-laden hose trailing behind. The guillotine operates by firing two electrically primed gas generators. When the gas generators fire...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870489
EISBN: 978-1-62708-314-0
... for carbon/epoxy tape The strength that a structure must possess is based on the ultimate combination of loads that will be applied under the most severe environmental conditions for the structure. However, to ensure that the structure will not fail at this ultimate load condition, a safety...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050317
EISBN: 978-1-62708-311-9
... from a number of manufacturers. Source: Ref 2 Coils with inadequate water flow will melt or will have soldered or brazed joints fail. Care must be taken in the fabrication of the coils to minimize restrictions. As with all piping used to carry water, the water passages should be clean, free...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060407
EISBN: 978-1-62708-261-7
... Abstract This chapter addresses some of the challenges involved in materials selection, providing context for much of the information presented in the book. It describes a typical four-step design scenario, noting material-related considerations and information needs. It explains how design...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ahsssta.t53700215
EISBN: 978-1-62708-279-2
.... Laser welded lap joints generally failed in the weld metal, while metal inert gas (MIG) fillet joints generally failed in the heat-affected zone. Zinc-coated materials demonstrated high levels of porosity. Another study was led by ASP to investigate resistance welding performance of seven types...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.caaa.t67870265
EISBN: 978-1-62708-299-0
... assigned for wrought products in all alloys: H x 11 applies to products that incur sufficient strain hardening after final annealing to fail to qualify as 0 temper, but not so much or so consistent an amount of strain hardening to qualify as H x 1 temper. H112 pertains to products that can acquire...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300047
EISBN: 978-1-62708-323-2
..., but they are used dry to try to produce pivots and the like that are almost frictionless, and oils and greases add lubricant viscosity effects. Unlubricated, and in continuous use, the bearing elements would be rubbing all the time and they would fail from wear or rolling contact fatigue (pits and...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780064
EISBN: 978-1-62708-281-5
... modified. Injection molding of thermoplastics and compression molding of thermosetting plastics will continue to be the most useful, cost-effective ways of producing high-quality, high-volume parts. Other processes should be considered, however, when these basic methods fail to satisfy specific...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110643
EISBN: 978-1-62708-247-1
... time after the PLL is initialized and then start testing the logic core that is clocked by the PLL – if the first few vectors fail then either there is a logic defect or the PLL has not locked yet, so in either case the IC is defective. Of course, this provides little diagnostic resolution. A more...