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service lifetime assessment

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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
... Abstract The lifetime assessment of polymeric products is complicated, and if the methodology utilized leads to inaccurate predictions, the mistakes could lead to financial loss as well as potential loss of life, depending on the service application of the product. This article provides...
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
... degradation processes (e.g., thermooxidation); mass is measured as a function of time at constant temperature. Service Life Prediction The Arrhenius equation, which describes the relation between rate of reaction and temperature, is one of the best-known models for assessing the lifetime of polymers...
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
... information on fatigue life assessment, elevated-temperature life assessment, and fitness-for-service life assessment. elevated-temperature life assessment fabrication failure analysis fatigue life assessment fitness-for-service life assessment material defects nondestructive inspection stress...
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
... of the structural design process, the failure analysis process, the failure investigator's role, and how failure analysis of structural components integrates into the determination of remaining life, fitness-for-service, and other life assessment concerns. The topics discussed include industry perspectives...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006823
EISBN: 978-1-62708-329-4
... Abstract This article illustrates the use of the American Petroleum Institute (API) 579-1/ASME FFS-1 fitness-for-service (FFS) code (2020) to assess the serviceability and remaining life of a corroded flare knockout drum from an oil refinery, two fractionator columns affected by corrosion under...
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004128
EISBN: 978-1-62708-184-9
...% and aircraft-specific costs increased by 4% ( Ref 6 ). Continuing assessments of the cost of corrosion to the Air Force show an increasing trend with the total costs increasing to about $1.1 billion in 2001 and $1.5 billion in 2004 ( Ref 7 ). Many of the military aircraft presently in service were built...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003286
EISBN: 978-1-62708-176-4
... has been achieved by reducing component geometry, leading to greater stresses in high-temperature materials. Naturally, the importance of reliable creep and stress-rupture testing increases with increasing service stress. Introducing new high-temperature materials that have lower densities is another...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003445
EISBN: 978-1-62708-195-5
... Abstract This article describes the role of the full-scale testing in assessing composite structural systems of aircraft and qualifying them for in-service use. The typical full-scale tests include static, durability, and damage tolerance. The article discusses the parameters to be considered...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003517
EISBN: 978-1-62708-180-1
..., thus avoiding major capital expenditure for the utilities ( Ref 9 ). A number of land-based turbines currently in operation have been in service in excess of 50,000 h. Thus, there is a growing need in the industry to assess the remaining life of aging components. Operating practices vary widely...
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
... Abstract This article provides some new developments in elevated-temperature and life assessments. It is aimed at providing an overview of the damage mechanisms of concern, with a focus on creep, and the methodologies for design and in-service assessment of components operating at elevated...
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004108
EISBN: 978-1-62708-184-9
..., environmental issues drove the development of compliant coatings based on new chemistries and technologies. The coatings that resulted required rapid assessment of performance expectations and field validations. Many high-performance coatings are now available for marine service. Some highly specific...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002393
EISBN: 978-1-62708-193-1
... tested to four lifetimes to support one service life (i.e., scatter factor of 4). Some notable examples were: KC-135 Safe-Life 13,000 h: 14 cases of unstable cracking in lower wing skins between 1800 and 5000 h. Lower wing surfaces were re-skinned at 8500 h. F5 Safe-Life 4000 h: Fatigue...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002394
EISBN: 978-1-62708-193-1
... of areas to include fracture mechanics in design. These included, as stated above, a series of standards that required contractors to use damage tolerance procedures as the primary design tool to ensure safety for new aircraft, a structural reassessment of in-service aircraft, and laboratory support from...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002363
EISBN: 978-1-62708-193-1
... scanning tunneling microscopy test specimen ultrasonic method X-ray diffraction technique MEASUREMENT OR DETECTION of fatigue cracks and damage can, in general terms, be classified into the following two application areas: laboratory methods and field service assessment methods. Specific techniques...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003706
EISBN: 978-1-62708-182-5
... in technology. The following framework attempts to establish a foundation on which both philosophies can be merged, enhanced, and incorporated with age- based structural degradations, such as corrosion, in order to better simulate damage progression and more accurately assess the economic service life...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006933
EISBN: 978-1-62708-395-9
... alter the ability of the plastic material to withstand service stresses. While the cause and type of degradation cannot be determined, DMA can assess the magnitude of the changes. This can provide insight into potential failure causes. Solid and Liquid Interactions Sepe ( Ref 6 ) notes that “DMA...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003456
EISBN: 978-1-62708-195-5
... that were complex by comparison. This complicated the maintenance actions of damage assessment, inspection, and repair. These problems, not foreseen at the design stage, made in-service damage a frequent occurrence, which was further aggravated by the lack of experience and materials needed to carry out...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006673
EISBN: 978-1-62708-213-6
... the various criteria to be considered for specimen preparation and calibration of TGAs. The use of thermogravimetric analysis data in the assessment of failure analysis of plastics and the combined usage of TGA with other techniques to understand the changes in the sample are also covered. The article...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006938
EISBN: 978-1-62708-395-9
... in assessing, defining, and specifying the expected lifetime is to ensure that the design process incorporates the key aspects of anticipated use for the part as well as those scenarios that may be reasonably expected to occur and to which the designer cannot prevent exposure. In the latter case, the designer...
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002476
EISBN: 978-1-62708-194-8
... engineer's perspective, brittle materials often exhibit attractive high-strength properties at service temperatures that are well beyond use temperatures of conventional ductile materials. For advanced diesel and turbine engines, ceramic components have already demonstrated functional abilities...