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failure mode assessment and assignment

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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.t52780093
EISBN: 978-1-62708-268-6
... Abstract After the fault-tree, a failure-cause identification method has identified potential failure causes and the failure analysis team has prepared a failure mode assessment and assignment (FMA&A). The team knows specifically what to search for when examining components and...
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...
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 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270031
EISBN: 978-1-62708-301-0
... chapter also covers quantitative fractography, fracture surface topography analysis, and the use of oxide dating as well as fault tree and failure modes and effects analysis (FMEA) and computational techniques. fault tree analysis fracture surface topography analysis oxide dating quantitative...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110032
EISBN: 978-1-62708-247-1
..., energy, and labor. All the costs of the operation are then assigned, using historical data for a specified reference period, to one or more of these activities. Each activity and associated cost is then inspected in detail to assess its relevance to the mission of the organization and its efficiency. The...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.horfi.9781627082563
EISBN: 978-1-62708-256-3
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
... the failure mode assessment and assignment (FMA&A) and ask if the suspect condition may be revealed by an analysis of the product pedigree. This is valuable from two perspectives: If the pedigree addresses the suspect area, it can be examined to assess if the pedigree reveals the presence of...
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 August 2005
DOI: 10.31399/asm.tb.horfi.t51180029
EISBN: 978-1-62708-256-3
... cause The broken crankshaft was an example of the physical level of failure cause. The specification with the poorly written requirements and possibly no subsequent technical assessment are two examples of the human level of failure cause. The company’s culture of cost reduction, which led to...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.horfi.t51180001
EISBN: 978-1-62708-256-3
... yourself, “How was I supposed to know that? I’m not an expert on propellers.” To perform a failure investigation, you must become knowledgeable about the component or structure and all possible failure modes. And you need to consult with experts in the field. Fig. 6 Propeller that failed by...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780001
EISBN: 978-1-62708-268-6
.... Identify all potential failure causes using brainstorming, mind-mapping, Ishikawa diagrams, flow charting, the “five whys” technique, or fault-tree analysis. List each potential failure cause in the failure mode assessment and assignment. Use appropriate documentation reviews, interviews, design...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.horfi.t51180091
EISBN: 978-1-62708-256-3
... root cause.” The difference is that the failure investigation team is assessing the probability and assigning priority to each corrective action, combined with a rationale. Repeat the instructions given in step 4 and create a corrective action assessment (CAA) chart. Referring to the corrective...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.horfi.t51180127
EISBN: 978-1-62708-256-3
... failure investigation are a fault tree, a failure mode assessment (FMA) chart, and a technical plan for resolution (TPR) chart. They provide a documented, interchangeable, and concise set of information to ensure that all possible root causes are evaluated logically and efficiently. After determination of...
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...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610549
EISBN: 978-1-62708-303-4
..., because large parts have greater volumes and surface areas. The orientation of the fracture surfaces must be consistent with the proposed mode of failure and the known loads on the failed part. Failure in monotonic tension produces a flat (square) fracture normal (perpendicular) to the maximum tensile...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780109
EISBN: 978-1-62708-268-6
... correct the conditions that allowed these nonconformances to occur, but the team cannot jump to the conclusion that just because a component is nonconforming it must have caused the failure. Each nonconformance should be compared to the fault-tree analysis and the failure mode assessment and assignment...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540215
EISBN: 978-1-62708-309-6
... used for materials characterization, structural design, life assessment, and failure analysis are available in Ref 5.6 and 5.7 . This section presents and discusses some frequently used mode 1 (crack opening mode) stress-intensity factors. Several crack geometries simulate those found in structural...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300079
EISBN: 978-1-62708-323-2
..., and calculations are made to determine the corrosion current. Fig. 4.32 Schematic of tribocorrosion testing with a potentiostat The corrosion of the couple can be assessed without rubbing and then with rubbing. The potentiostat produces real-time corrosion current so one can see if...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.9781627083232
EISBN: 978-1-62708-323-2