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crack tip opening displacement
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Published: 01 January 2002
Fig. 28 Correlation between crack-tip opening displacement (CTOD) and toughness. (a) Stretched-zone depth versus CTOD. (b) Stretched-zone width versus CTOD. (c) Stretched-zone width versus depth. Source: Ref 18
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Published: 01 January 2002
Fig. 9 Crack-tip opening displacement (CTOD) toughness, HSLA 50. δ, CTOD; δ c , CTOD fracture toughness, no significant stable crack extension, unstable fracture; δ e , elastic component of CTOD; δ m , CTOD fracture toughness, significant stable crack extension, plastic collapse; δ p , plastic
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Image
Published: 31 October 2011
Fig. 39 Plot of crack tip opening displacement versus peak temperature of the second thermal cycle for simulated specimens subjected to a double thermal cycle. ( T p1 = 1400 °C = 2550 °F; Δ t 8-5 = 20 s). The heat-affected zones ( Fig. 39 ) corresponding to the simulation trials are also
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in Low-Temperature Properties of Structural Steels
> Properties and Selection: Irons, Steels, and High-Performance Alloys
Published: 01 January 1990
Fig. 8 Correlation of (a) CVN impact energy and crack tip opening displacement and (b) crystallinity with nil-ducility transition temperature for API 2W grade 50, a TMCP steel with a thickness of 89 mm (3 1 2 in.)
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in Low-Temperature Properties of Structural Steels
> Properties and Selection: Irons, Steels, and High-Performance Alloys
Published: 01 January 1990
Fig. 12 Crack tip opening displacement versus the percent of grain-coarsened regions for several structural steels. Source: Ref 27
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Published: 01 January 1993
Fig. 30 Plot of crack tip opening displacement versus peak temperature of the second thermal cycle for simulated specimens subjected to a double thermal cycle. ( T p1 = 1400 °C = 2550 °F; Δ t 8−5 = 20 s). The HAZ zones ( Fig. 29 ) corresponding to the simulation trials are also shown
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Image
Published: 01 January 1993
Fig. 13 Macrograph of the fracture surface of a crack tip opening displacement test specimen removed from the 1.07 m (42 in.) X-65 steel pipe. The regions of the surface shown correspond with the notch, precrack, stable crack growth, fast fracture, and overload zones.
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Image
Published: 15 January 2021
Fig. 28 Correlation between crack-tip opening displacement (CTOD) and toughness. (a) Stretched-zone depth versus CTOD. (b) Stretched-zone width versus CTOD. (c) Stretched-zone width versus depth. Source: Ref 18
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Series: ASM Handbook
Volume: 1
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v01.a0001034
EISBN: 978-1-62708-161-0
... of welds. The major tests that are discussed in this article are weld tension test, bend test, the drop-weight test, the Charpy V-notch test, the crack tip opening displacement test, and stress-corrosion cracking test. arc welding cold cracking fabrication hot cracking low-alloy steels...
Abstract
This article aims to survey the factors controlling the weldability of carbon and low-alloy steels in arc welding. It discusses the influence of operational parameters, thermal cycles, and metallurgical factors on weld metal transformations and the susceptibility to hot and cold cracking. The article addresses the basic principles that affect the weldability of carbon and low-alloy steels. It outlines the characteristic features of welds and the metallurgical factors that affect weldability. It describes the common tests to determine steel weldability. There are various types of tests for determining the susceptibility of the weld joint to different types of cracking during fabrication, including restraint tests, externally loaded tests, underbead cracking tests, and lamellar tearing tests. Weldability tests are conducted to provide information on the service and performance of welds. The major tests that are discussed in this article are weld tension test, bend test, the drop-weight test, the Charpy V-notch test, the crack tip opening displacement test, and stress-corrosion cracking test.
Book: Fatigue and Fracture
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002380
EISBN: 978-1-62708-193-1
... testing, J-R curve evaluation, and crack tip opening displacement (CTOD) method. Other methods used include the combined J standard method, the common fracture toughness test, transition fracture toughness testing, and the weldment fracture testing method. crack initiation fracture toughness...
Abstract
This article describes the test methods of fracture toughness, namely, linear-elastic and nonlinear fracture toughness testing methods. Linear-elastic fracture toughness testing includes slow and rapid loading, crack initiation, and crack arrest method. Nonlinear testing comprises J IC testing, J-R curve evaluation, and crack tip opening displacement (CTOD) method. Other methods used include the combined J standard method, the common fracture toughness test, transition fracture toughness testing, and the weldment fracture testing method.
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
... as they relate to fracture toughness and design process. The article explores the use of plane strain fracture toughness, crack-tip opening displacement, and the J-integral as the criteria for the design and safe operation of structures and mechanical components. It discusses the variables affecting fracture...
Abstract
Fracture toughness is the ability of a material to withstand fracture in the presence of cracks. This article focuses on the use of fracture toughness as a parameter for engineering and design purposes. Both linear elastic and elastic-plastic fracture mechanics concepts are reviewed as they relate to fracture toughness and design process. The article explores the use of plane strain fracture toughness, crack-tip opening displacement, and the J-integral as the criteria for the design and safe operation of structures and mechanical components. It discusses the variables affecting fracture toughness, including yield strength, loading rate, temperature, and material thickness. A summary of different fatigue and fracture mechanics design philosophies and their relationship with fracture toughness is provided. The article concludes with information on the examples of fracture toughness in design.
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...
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 diagram (FAD), and deformation plasticity failure assessment diagram (DPFAD). This article presents the origin and description of FAD and addresses R6 FAD using J-integral. It details the fracture criteria of BS 7910. The factors to be considered during the use of FAD and the applications of FAD are also reviewed.
Series: ASM Handbook
Volume: 2B
Publisher: ASM International
Published: 15 June 2019
DOI: 10.31399/asm.hb.v02b.a0006457
EISBN: 978-1-62708-210-5
...-plastic fracture, namely R-curve concept, J-integral concept, and crack tip opening displacement method. The article considers the primary measures used to assess the toughness of aluminum alloy castings and wrought alloys: notch toughness, tear resistance, and plane-strain fracture toughness...
Abstract
This article discusses the concepts underlying linear elastic fracture mechanics and elastic-plastic fracture mechanics as well as their importance in characterizing the fracture behavior of the high-strength aluminum alloys. It describes the three methods used for analyzing elastic-plastic fracture, namely R-curve concept, J-integral concept, and crack tip opening displacement method. The article considers the primary measures used to assess the toughness of aluminum alloy castings and wrought alloys: notch toughness, tear resistance, and plane-strain fracture toughness.
Image
Published: 01 January 2000
Fig. 11 Sample specimen showing the definition of crack-mouth opening displacement (CMOD) and crack-tip opening displacement (CTOD). CTOD is the diameter of the circular arc at the blunted crack tip and should not be confused with the plastic zone. Source: Ref 10
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Published: 01 January 1997
Fig. 4 Schematic of a sample specimen showing the definition of crack-mouth opening displacement (CMOD) and crack-tip opening displacement (CTOD). CTOD is the diameter of the circular arc at the blunted crack tip and should not be confused with the plastic zone. Source: Ref 16
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Published: 01 June 2024
Fig. 23 Fracture Surface Topography Analysis (FRASTA)-generated fractured area versus conjugate surface spacing relationship, analogous to the conventional crack length versus crack face displacement curve for a J - R test; also showing how crack-tip opening displacement (CTOD) and crack
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Published: 01 January 2002
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Published: 15 January 2021
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Published: 15 January 2021
Fig. 27 Measurement of the stretched zone in a fractured specimen. (a) Crack-tip blunting and the stretched zone. CTOD, crack-tip opening displacement. (b) Topography of the stretched zone. Source: Ref 17
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Published: 01 January 1996
Fig. 17 Model of static crack advance after Schwalbe ( Ref 29 ). The crack-tip opening displacement is equal to the dimple spacing or inclusion spacing.
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