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practical life-enhancement methods

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Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003512
EISBN: 978-1-62708-180-1
... programs, enhanced analytical modeling and prediction techniques, accurate life assessment methods, and a fortified commitment to avoid the recurrence of these failures through improved designs. The examples cited in Table 1 were serious and often tragic failures that had a great impact on structural...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0090030
EISBN: 978-1-62708-217-4
... to address the anomalies, with the objective of enhancing rotor life management practices. The ongoing work involves the use of fracture mechanics and software (called DARWIN.) optimized for damage tolerant design and analysis of metallic structural components. Compressors Damage tolerance analysis...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006802
EISBN: 978-1-62708-329-4
... assessment nondestructive inspection structural components LIFE ASSESSMENT of structural components is used to avoid catastrophic failures and to maintain safe and reliable functioning of equipment. The articles in the “Structural Life Assessment Methods” Section in this Volume and in Failure...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006921
EISBN: 978-1-62708-395-9
... information on the common aging mechanisms of polymeric materials and the common accelerated testing methods used to obtain relevant data that are used with the prediction models that enable service life assessment. Beginning with a discussion of what constitutes a product failure, this article then reviews...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006819
EISBN: 978-1-62708-329-4
.... Finally, the article presents practical fatigue assessment case studies of in-service equipment (pressure vessels) that employ DBA methods. damage tolerance design analysis fatigue damage mitigation fatigue life assessment fracture mechanics pressure vessels welds FATIGUE FAILURE of metal...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003514
EISBN: 978-1-62708-180-1
... sampling probabilistic analysis probability of failure response surface method risk analysis system reliability target reliability time-variant reliability APPLICATION of probabilistic analysis methods for life assessment of structural components is becoming more prevalent because...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006753
EISBN: 978-1-62708-295-2
... Abstract This article briefly introduces the concepts of failure analysis, including root-cause analysis (RCA), and the role of failure analysis as a general engineering tool for enhancing product quality and failure prevention. It initially provides definitions of failure on several different...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003500
EISBN: 978-1-62708-180-1
..., design deficiencies, material defects, manufacturing/installation defects, and service life anomalies, with examples. The article describes several common charting methods that may be useful in performing an RCA. It also discusses other failure analysis tools, including review of all sources of input...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006780
EISBN: 978-1-62708-295-2
... in high-temperature applications. The complex effects of creep-fatigue interaction are also discussed, although more detail on this is described in the article “Thermomechanical Fatigue: Mechanisms and Practical Life Analysis” in this Volume. Life assessment is also covered in the article “Elevated...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006918
EISBN: 978-1-62708-395-9
... loading. When designing for the fatigue life of an engineering polymer, one of two distinct philosophies is generally practiced ( Ref 5 , 9 , 13 ). The total-life approach is used with unnotched specimens that are assumed to be defect-free. This methodology is predicated on the notion that fatigue...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001763
EISBN: 978-1-62708-241-9
... to work safely with a desired service life. The reverse shaft in this study was sized by ATV manufacturer without transient load input. Therefore, to prevent fatigue damage and increase the service life of the driven shaft, material strengths are critical. In practice, manufacturing processes...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006768
EISBN: 978-1-62708-295-2
... such as the dislocation density and the crystallite size in the sample, as well as instrumental effects such as slit size and defocusing if the goniometer is not using a parallel beam ( Ref 1 ). In practice, that is, in most cases, XRD patterns obtained from real-life components exhibit broadening due to cold-working...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006909
EISBN: 978-1-62708-395-9
... for practical lengths of time (i.e., 6 to 12 months). Long-term service requirements, prohibitive testing costs, and the limited time available for product development, evaluation, and validation make accelerated life testing and aging necessary. Accelerated testing is carried out for several reasons: to assess...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003545
EISBN: 978-1-62708-180-1
... and associated failures of alloys used in high-temperature applications. The complex effects of creep-fatigue interaction are also discussed, although more detail on this is described in the article “Thermomechanical Fatigue: Mechanisms and Practical Life Analysis” in this Volume. Life assessment is also...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001459
EISBN: 978-1-62708-234-1
... to the laboratory than to an examination on site. Radiographic Method Both X- and gamma- ray techniques have been used to some extent for the detection of cracks. The method has two serious objections and is of limited practical value. In the first place, a crack may be so fine that the method...
Book Chapter

Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003544
EISBN: 978-1-62708-180-1
... Abstract This article describes three design-life methods or philosophies of fatigue, namely, infinite-life, finite-life, and damage tolerant. It outlines the three stages in the process of fatigue fracture: the initial fatigue damage leading to crack initiation, progressive cyclic growth...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006800
EISBN: 978-1-62708-329-4
... and existing business relationships, also may be relevant. Finally, once the set of the most practical part configurations has been generated, a more formal evaluation should be performed. The evaluation can be done by Pugh’s method ( Ref 6 ) or by other methods presented in Ref 4 . In any method...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001594
EISBN: 978-1-62708-229-7
.... They are cost effective to install in the field and the fact that they can be assembled quickly is important where minimizing the radiation dose is a consideration in the repair process. Enhanced field fabrication methods can be expected to result in even better reliability. Experiments performed...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006807
EISBN: 978-1-62708-329-4
... assessment stress relaxation time-dependent stress analysis ELEVATED-TEMPERATURE LIFE ASSESSMENT METHODS are discussed in the article “ Elevated-Temperature Life Assessment for Turbine Components, Piping, and Tubing ” in the 2002 edition of Failure Analysis and Prevention , Volume 11 of ASM Handbook...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003501
EISBN: 978-1-62708-180-1
... but can be as prone to human errors as the time-honored autographic drafting methods. Many companies cross-reference stand-alone materials specifications that contain much more detailed purchasing and processing information than could be conveniently placed on the part drawings. This practice has...