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crack-tip opening displacement

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Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003513
EISBN: 978-1-62708-180-1
... Abstract Optimized modeling of fracture-critical structural components and connections requires the application of elastic-plastic fracture mechanics. Such applications, however, can require sophisticated analytical techniques such as crack tip opening displacement (CTOD), failure assessment...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.9781627081801
EISBN: 978-1-62708-180-1
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0006548
EISBN: 978-1-62708-180-1
... opening displacements COV coefficient of variation CPSC Consumer Product Safety Commission CTE coefficient of thermal expansion CTOD crack-tip opening displacement CVD chemical vapor deposition CVN Charpy V-notch (impact test or speci- men) d depth; diameter da/dN fatigue crack growth rate da/dt crack...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006910
EISBN: 978-1-62708-395-9
... 28660 CTOD (also considered in E1820) SENB and CT Post-yield (plane stress) Low (< 1 m/s) … ISO/CD 23524.2 … SENB, SENT and DENT LEFM, linear elastic fracture mechanics; DKC, dynamic key curve; CTOD, crack-tip opening displacement; SENB, single-edged notched bending; CT, compact...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c0048840
EISBN: 978-1-62708-220-4
... of the base metal, and decreased linearly over the first 40% of the wall thickness. Fracture mechanics tests were used to predict the mode of failure of the various plates. Measurements of crack-tip opening displacement indicated that ductile failure would occur in at least one plate that sustained...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c9001137
EISBN: 978-1-62708-228-0
... , September 1985 . 4. Holland M. L. , SASOL, Private Communication 1983 . 5. Harrison J. D. , “The State-of-the-Art in Crack Tip Opening Displacement (CTOD) Testing and Analysis” . Metal Construction , September, October, November , 1980 . Selected References Selected...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001605
EISBN: 978-1-62708-217-4
... depends on the stress, the load, the velocity, the crystal structure, and the texture. Quantitative statements about the local fracture toughness can be made by measuring the stretched zone width (SZW), the stretch zone height (SZH), and/or the crack tip opening displacement (CTOD). The stretched zone...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006945
EISBN: 978-1-62708-395-9
... Association computed tomography; compact tension coef cient of thermal expansion chlorotri uoroethylene crack tip opening displacement Diallyl chlorendate; distance amplitude correction diallyl phthalate ductile-brittle transition temperature dynamic dielectric analysis diaminodiphenylsulfone design...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006767
EISBN: 978-1-62708-295-2
... introduces the stress analysis of bodies containing cracklike imperfections and the topic of fracture mechanics. The fracture mechanics approach is based on the analysis of the crack tip stress and strain field. The initial approach proposed by George Irwin, the father of fracture mechanics, used the stress...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003530
EISBN: 978-1-62708-180-1
... of fracture mechanics. The fracture mechanics approach is an important part of stress analysis at the tips of sharp cracks or discontinuities. The article reviews fracture mechanics concepts, including linear elastic fracture mechanics, elastic-plastic fracture mechanics, and subcritical fracture mechanics...
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
... fibril is observed in the crack mouth, with several fibrils nucleating in front of the crack tip. (b) The lone fibril in the crack mouth has ruptured, along with some small fibrils in the void that has opened in front of the crack tip. A long fibril continues to be drawn out. (c) The void in front...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001515
EISBN: 978-1-62708-229-7
... of the tube, rather than towards the outside as in the region of stable radial-axial DHC. The opened lamination was filled with layers of oxide and at the tip of the lamination were many hydrides ( Figure 8 ). In some areas, a stepped crack extended from the tip of the lamination, jumping from hydride...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001821
EISBN: 978-1-62708-180-1
... were not destroyed. Figure 6 shows a transmission electron microscopy (TEM) fractograph at a magnification of 56,000× at the crack tip, which was 16 mm (0.63 in.) deep. Striationlike features are visible on the crack surface at various locations. The random variable loading produced striations...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006919
EISBN: 978-1-62708-395-9
... were also introduced in fatigue from a razor notch. When sharp cracks were achieved (open circle, Fig. 29 ), the test results agreed well with the predictions. When blunt cracks appeared, along with stress whitening at the crack tip, higher fracture loads were observed (closed circle, Fig. 29...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001569
EISBN: 978-1-62708-229-7
... and cracking occurred under fin. The cracking was multiple, longitudinally oriented, localized under the tip of the fin, and potentially effected 1380 tubes. The interior of the tube was roughened by pitting due to oxygen and water chemistry upsets. Numerous cracks were present inside the tube near...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001789
EISBN: 978-1-62708-241-9
... are summarized in Table 4 . NAB showed lower overall toughness in air compared to ASB (when subcritical cracking is not considered), which was expected based on the higher strength of NAB. Calculated crack lengths may not be accurate because of plasticity at the crack tip; however, the limited NAB testing...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001845
EISBN: 978-1-62708-241-9
...: ( a ) overall morphology of the cross-section by SEM, ( b–e ) microstructure observed by optical microscope, and ( f ) crack-tip regions observed by SEM Fig. 4 SEM images of specimens A and B, showing fracture morphology of ( a–c ) splint A and ( d–f ) splint B Fig. 7 FEA results...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001793
EISBN: 978-1-62708-241-9
..., necessary to control the pitch of the propeller blades. The fatigue cracks were initiated at the welded interfaces, propagating through the weld metal and, subsequently, the pipe metal. In some cases cracks were originated at both tips of a wire spacer, with a resulting window-type opening on the surface...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006824
EISBN: 978-1-62708-329-4
... reveals gradients in the displacement of the crack surfaces (wide at the crack origin, narrow at the crack tip) and oxidation/alloy depletion of the crack surfaces (progressively less oxidation toward the crack tip). The TMF cracks may progress intergranularly, transgranularly, or a mixture of both...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006774
EISBN: 978-1-62708-295-2
... of constraint, subsequent crack propagation can be microscale ductile or brittle. This limited microscale ductility provides a second quantitative evaluation of toughness and stress at fracture by relating the crack tip opening displacement to toughness. The analytical relations are described in Appendix 2...