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damage tolerant criterion

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Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006779
EISBN: 978-1-62708-295-2
... fluctuations. This article begins with an overview of fatigue properties and design life. This is followed by a description of the two approaches to fatigue, namely infinite-life criterion and finite-life criterion, along with information on damage tolerance criterion. The article then discusses...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002350
EISBN: 978-1-62708-193-1
.... This article presents three general approaches to fatigue design, with a discussion on their respective attributes. These include infinite-life criterion, finite-life criterion, and damage tolerant criterion. The article describes the individual property requirements of these approaches. It also presents...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003386
EISBN: 978-1-62708-195-5
... ( Ref 5 ) Fig. 1 Damage tolerance of a metallic structure based on initial design. Flaw size (broken line) and residual strength (solid line) are plotted versus time. Fig. 2 Damage tolerance of a metallic structure based on actual usage. Flaw size (broken line) and residual strength...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002383
EISBN: 978-1-62708-193-1
... or a spreadsheet computer program. The iterative solution of Eq 19 must be programmed, so the use of a dedicated software program for residual strength analysis is advisable. Some damage tolerance software is equipped with these capabilities. First, consider the use of LEFM and Eq 16 . Obviously, solutions...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003400
EISBN: 978-1-62708-195-5
... (CFCCs) is their ability to undergo inelastic straining upon mechanical loading. This article reviews the mechanics of inelastic deformation and fracture of CFCCs, as needed for the development of damage-tolerant failure prediction methodologies for use in engineering design. It outlines a general...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002381
EISBN: 978-1-62708-193-1
... of the structures being out of service, and the damage that would be caused by a fracture failure. This article describes the key principles of fracture control and reviews the concepts of damage tolerance analysis. It further presents practical guidelines to obtain useful and reasonable answers from damage...
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002470
EISBN: 978-1-62708-194-8
... opening displacement; HAZ, heat-affected zones. Source: Ref 16 Design criteria for sizing aircraft, showing how fracture toughness is used in damage-tolerant design Table 6 Design criteria for sizing aircraft, showing how fracture toughness is used in damage-tolerant design Modeof failure...
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
... for lower wing surface residual strength crack resistance Fig. 8 Tradeoff between detectable crack size and safe inspection Abstract Damage tolerance is a philosophy used for maintaining the structural safety of commercial transport aircrafts. This article describes the structural...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003313
EISBN: 978-1-62708-176-4
...-life, finite-life Strain-life ε- N Damage tolerant Fracture mechanics da / dN -Δ K The S - N and ε- N techniques are usually appropriate for situations where a component or structure can be considered a continuum (i.e., those meeting the “no cracks” assumption). In the event...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006462
EISBN: 978-1-62708-190-0
..., is the “inspectable” (i.e., detectable) flaw size. The inspectable flaw size is the flaw size that can be detected with a specific probability and confidence. The USAF uses 90% probability and 95% confidence for its inspectable-flaw criterion. For the case of fatigue, the damage tolerant approach, which has found...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002416
EISBN: 978-1-62708-193-1
... with various cut lengths. W ≥ 8 a o Fig. 34 Stress-intensity correction factors for pressurized shells with cuts Abstract This article presents the damage tolerance criteria for military composite aircraft structures to safely operate the structures with initial defects or in-service...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006443
EISBN: 978-1-62708-190-0
...-tolerant design. The essential feature of such an approach is the incorporation of redundant load paths so that, even if local failures do occur, the structure will be safe for a period of time and can either be removed from service or repaired. Parts containing readily detectable damage can be used...
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
... propagation in different environments. The article concludes with a discussion on rolling-contact fatigue, macropitting, micropitting, and subcase fatigue. corrosion fatigue crack growth crack initiation damage tolerance criterion fatigue fracture fatigue strength fatigue-crack propagation finite...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005461
EISBN: 978-1-62708-196-2
...-element study that the Cockcroft-Latham criterion provided the best predictive capability. The Cockcroft-Latham n, by integrating the tensile plastic work over the entire metalworking process, accumulates the damage done to the microstructure (microvoid formation, void growth and coalescence) by tensile...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003515
EISBN: 978-1-62708-180-1
... Abstract This article provides information on life assessment strategies and conceptually illustrates the interplay of nondestructive evaluation (NDE) and fracture mechanics in the damage tolerant approach. It presents information on probability of detection (POD) and probability of false alarm...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004002
EISBN: 978-1-62708-185-6
... and damage tolerance ( Ref 34 ). It is a replacement for a titanium part with a reduction in weight and production cost. Another application utilizing the ability to match coefficient of thermal expansion with mating materials was the use of 6061/SiC/40p MMC in the covers for an aerospace inertial guidance...
Book: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002120
EISBN: 978-1-62708-188-7
... principles. Tool replacement decisions are dependent on predicting or sensing the magnitude of the wear damage caused by the active wear mechanisms on critical wear surfaces. Tools are replaced to minimize the probable consequences of a failure event. The tool wear environment is so complex that even...
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002474
EISBN: 978-1-62708-194-8
... most applications can tolerate wear depths one to two orders of magnitude above the CLA value. In situations where an acceptable “zero wear design” cannot be found because of cost or technical reasons, a less conservative approach is then used. In this situation a more realistic failure criterion...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003379
EISBN: 978-1-62708-195-5
... failure is by dilation. However, it is clear that substantial subsequent damage can be tolerated before catastrophic failure occurs. The assessment shown for damage progression has been fitted to only one test point. The same value of the J 2 invariant is used for all of the other predictions...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002366
EISBN: 978-1-62708-193-1
... , Appl. Mech. Rev. , Vol 43 ( No. 11 ), 1990 , p 283 – 295 10.1115/1.3119155 3. McDowell D.L. , Multiaxial Effects in Metallic Materials, ASME AD, Vol 43 , Durability and Damage Tolerance , Noor A.K. and Reifsnider K.L. , Ed., 1994 , p 213 – 267 4. Krempl E...