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crack-tip opening displacement

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Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610101
EISBN: 978-1-62708-303-4
... with the steps involved in determining strain energy release rates, stress intensity factors, J-integrals, R-curves, and crack tip opening displacement parameters. It also covers fracture toughness testing methods and the effect of measurement variables. crack tip opening displacement elastic-plastic...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240221
EISBN: 978-1-62708-251-8
... such as the crack tip opening displacement and the J -integral tests have extended the use of fracture mechanics to elastic-plastic conditions, which are associated with lower-strength materials and smaller cross-sectional sizes. However, when stresses approach or exceed the yield strength, the elastic stress...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270031
EISBN: 978-1-62708-301-0
...-precracked, then loaded monotonically to extend the crack. The cracked area was heat-tinted for easy identification and then the fracture surfaces opened ( Ref 14 , 15 ). Figure 5.9 shows the XSP obtained by displacing the topographs along a center plane normal to the fracture surface. The crack tip...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.9781627082709
EISBN: 978-1-62708-270-9
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.horfi.9781627082563
EISBN: 978-1-62708-256-3
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030126
EISBN: 978-1-62708-282-2
.... , Vol 1 , 1985 , p 480 10.1179/026708385790124675 14. Hagn L. , Lifetime Prediction for Parts in Corrosion Environments , Corrosion in Power Generating Equipment , Plenum Press , 1983 15. Buck O. and Ranjan R. , Evaluation of a Crack-Tip-Opening Displacement Model...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090001
EISBN: 978-1-62708-266-2
... for Parts in Corrosion Environments , Corrosion in Power Generating Equipment , Plenum Press , 1983 1.23 Buck O. and Ranjan R. , Evaluation of a Crack-Tip-Opening Displacement Model Under Stress-Corrosion Conditions , Modeling Environmental Effects on Crack Growth Processes , Jones...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780211
EISBN: 978-1-62708-281-5
... a strong dependence on the rate at which stress is applied. The crack opening displacements in polymeric materials can be quite large and, hence, the microstrain at a crack tip will be similarly large. In polymeric materials displaying minimal levels of plasticity and/or inelasticity, such as untoughened...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130111
EISBN: 978-1-62708-284-6
... that contribute to cracking. A careful macroexamination is necessary to characterize the condition of the fracture surface so that the subsequent microexamination strategy can be determined. Corrodents often do not penetrate the crack tip, and this region remains relatively clean. The visual macroanalysis...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540215
EISBN: 978-1-62708-309-6
... growth are also discussed. Linear-elastic fracture mechanics is the base for all the methods presented in these two chapters. Chapter 6 discusses methods based on nonlinear fracture mechanics, which are suitable for fatigue crack growth and/or fracture due to excessive yielding at the crack tip...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.t60490021
EISBN: 978-1-62708-340-9
... displacement is defined as the displacement of the two crack surfaces at the tip of the crack, generally measured by clip gages at the specimen outer surfaces near the crack. As a material containing a crack is loaded progressively, crack-opening displacement increases as accommodated by plastic deformation...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090367
EISBN: 978-1-62708-266-2
... in small test specimens the gross section exposure stress decreases. This results from the opening of the crack (or cracks) under the high stress concentration at the crack tip (or tips) and causes some of the applied elastic strain to change to plastic strain, with an attendant reduction in the initial...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630257
EISBN: 978-1-62708-270-9
... standards are used, and ASTM E 399 ( Ref 2 ) is used to determine K Ic . Fig. 3 Modes of loading. Mode I (opening mode): tension stress in the y direction, or perpendicular to crack surfaces. Mode II (edge-sliding mode): shear stress in the x direction, or perpendicular to the crack tip. Mode...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540001
EISBN: 978-1-62708-309-6
... with a crack extending from the straight edge toward the top. The highest stress point is now at the crack tip, because stress concentration is highest there. The area along the crack line is unloaded. Figure 1.44 is a plot of the cross-sectional stress distribution for the notched specimen subjected to pure...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060149
EISBN: 978-1-62708-261-7
... But energy is also expended during crack growth because the atomic bonds at the crack tip are broken, and so some work is done by the applied forces. The total surface energy or work, W s , associated with the formation of these new fracture surfaces is: (Eq 7.7) W s = 4 a b γ s...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500019
EISBN: 978-1-62708-317-1
..., width and length, mm (in.) 1 × 60 × 210 (0.04 × 2.4 × 8.3) Sheet orientation Rolling and transverse direction V-die angle (α d ) and punch tip angle (α p ), degrees 75 Punch tip radius ( R p ), mm (in.) 4.75 (0.20) V-die opening ( W ), mm (in.) 38.1 (1.5) Approximate inner bending...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780238
EISBN: 978-1-62708-281-5
... used to describe the magnitude of the stresses, strains, and displacements in the region ahead of the crack tip. The linear elastic solution ( Fig. 6 ) for the normal stress, σ yy , in the opening mode of loading is written as a function of distance, r , and angle, θ, away from the crack tip ( Ref...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610209
EISBN: 978-1-62708-303-4
.... Physically, this is quite understandable, because as the crack is loaded, the crack tip opening displacement will not be able to reach its maximum value due to cracking/decohesion of the inclusion and the linkup with the crack tip. In fact, K Ic would be expected to vary directly with the square root...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780216
EISBN: 978-1-62708-281-5
... evident as the test temperature is reduced. Stress concentrators can also have a significant effect on such transitions, with the presence of a crack being the most critical. In any case, a ductile-to-brittle transition in behavior within the design envelope for such structures as motorcycle helmets...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.ex2.t69980059
EISBN: 978-1-62708-342-3
... Abstract This chapter opens with a discussion of the classification of rod and tube extrusion processes. The standard processes involve hot working (extrusion at temperatures above room temperature), but some specialized cold working processes are also used for rod and tube extrusion. The next...