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hypothesized failure modes

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780067
EISBN: 978-1-62708-268-6
... Abstract Failure mode assessment and assignment (FMA&A) is a tool designed to help organize the evaluation of hypothesized failure modes. This chapter begins by describing the process of preparing an FMA&A. It then describes the follow-on activities to evaluate the hypothesized failure...
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
... Abstract After the failure analysis team hypothesizes failure causes, prepares a failure mode assessment and assignment, and evaluates all potential failure causes, it may find in some cases that several causes are still suspect but cannot be confirmed. In this situation, an experiment is...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780075
EISBN: 978-1-62708-268-6
... Abstract A product pedigree describes its design and how it was built and shows that it was built in accordance with the drawings and other documentation defining the product configuration. Evaluating the pedigree of a failed product can help to rule in or rule out hypothesized failure causes...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.horfi.t51180151
EISBN: 978-1-62708-256-3
... nondestructive tests, preparing and examining fractographs and micrographs, determining failure mode, writing the report, and developing follow-up recommendations. It also examines the fundamental mechanisms of failure, why they occur, and how to identify them by their characteristic features. failure...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540319
EISBN: 978-1-62708-309-6
... loading can lead to delamination, the primary failure mode of most composites, and describes some of the methods that have been developed to improve delamination resistance, assess damage tolerance, determine residual strength, and predict failure modes. composite laminate damage tolerance...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780093
EISBN: 978-1-62708-268-6
... analysis for assessing material characteristics. Techniques in this area include energy-dispersive analysis of x-rays, spectroscopy, chromatography, and others. The failure analysis team should select appropriate examination techniques based on hypothesized failure modes. If the team suspects, for...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780189
EISBN: 978-1-62708-268-6
... failure mode assessment and assignment matrices Evaluating potential failure causes using pedigree analysis, change analysis, dimensional conformance and materials assessment tools, and analysis of variance and Taguchi test techniques Selecting and implementing appropriate corrective actions...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780001
EISBN: 978-1-62708-268-6
... hypothesized causes and prevent them from recurring as well. In subsequent chapters, this book introduces and develops several sophisticated approaches for identifying and evaluating potential failure modes, developing potential corrective actions, and then selecting the best corrective actions. All of...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110524
EISBN: 978-1-62708-247-1
... S.J. , McHugo Scott , Girolami Grant , Mayone Myrna , Kim Seongsin , and Widjaja Wilson , “ Failure Mode Analysis of Oxide VCSELs in High Humidity and High Temperature ”, Journal of Lightwave Technology , Vol 21 , pp. 1013 - 1019 , ( 2003 ). 10.1109/JLT.2003.809546...
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
... should evaluate the process to determine if any changes occurred that relate to hypothesized failure modes. It is almost a certainty that changes have occurred; the failure analysis team must determine if any of these induced the failure. New machinery, fixturing, setup methods, machine speeds, machinery...
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
... tolerance conditions, worst-case loads, material incompatibilities, and other factors outlined in this chapter. When all of the parts and assembly operations associated with hypothesized failure causes are found to be conforming, the failure analysis team should revisit the engineering development...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780141
EISBN: 978-1-62708-268-6
... analysis team prepared a fault-tree analysis and a failure mode assessment and assignment. One of the hypothesized failure modes was epoxy disbonding due to the presence of contaminants on the bonding surface. The failure analysis team examined the failed bond joints and discovered that clean separations...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910475
EISBN: 978-1-62708-250-1
... rate, extent, and type of corrosive attack that can be tolerated in a part vary widely, depending on the specific application. When investigating a corrosion failure, an analyst must do the following: Determine the failure mode Determine the failure cause Estimate the extent of damage and...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780109
EISBN: 978-1-62708-268-6
... existence of hypothesized failure modes in each of these categories. Both metallic and composite materials are widely used in a variety of applications, and these are frequently joined with epoxy or other adhesives. The term composite may refer to metallic items bonded together with...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780383
EISBN: 978-1-62708-281-5
... AES beam makes it impossible to use the technique on many insulating specimens. Nevertheless, in many suspected polymer failure cases, Auger-ion milling depth profiles can be obtained quickly from both failure surfaces, giving enough initial information to make preliminary hypotheses and to decide on...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540047
EISBN: 978-1-62708-309-6
... analysis, but also contribute to how a structural part will fail. Loading condition (including loading rate) plays an important role in the mode of structural failure, interacting with structural geometry and ambient environment to govern whether the failure mode is ductile or brittle. On a macroscopic...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110447
EISBN: 978-1-62708-247-1
... contamination is not possible. In those cases we rely on comparison between good and bad sample. Physical FA techniques are developing to assist our quest to have defect free production. The same techniques can be applied to prevent the occurrence of specific failure modes by early detection. In some...
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
... modes of all parts (as do other analytical techniques such as failure modes and effects analysis). The fault-tree analysis is only interested in failure causes, conditions, events, and combinations of these things that can induce the top undesired event. Other events or conditions that do not contribute...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.tb.ssde.t52310027
EISBN: 978-1-62708-286-0
... show. These effects are not linear and underscore the value of these tables. The uniform corrosion rate in contaminated sulfuric acid may be more important than in pure acid since this represents a potentially likely failure mode because contamination is a constant hazard. Figure 8 shows the...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410439
EISBN: 978-1-62708-265-5
... during low-performance and fracture during application. These types of failure and the stress states that cause the failures are described by Wulpi ( Ref 19.3 ). This chapter describes some of the interrelated processing, chemical, and microstructural causes associated with cracking, low toughness...