by D Camas · 2016 — KEYWORDS: Fatigue crack propagation; non-linear crack tip parameters; crack tip opening ... relationship between the amplitude of crack tip blunting over a full .... corrosion fatigue, crack path, crack tip blunting, microstructure, Paris Region, S355 steel. 1 | INTRODUCTION. Understanding how a crack propagates in a given .... A crack tip blunting mechanism would suggest that the crack length affected by the overload , Aa , should be restricted to the crack tip region which is clearly not ...
In ductile metals one of basic mechanisms for fatigue crack growth is that based on crack-tip blunting under the maximum.... by P Peralta · 2007 · Cited by 27 — The plastic blunting process during stage II fatigue crack growth was studied in pure ... ahead of the tip, which represents a basic length scale for plastic blunting.. by JM Vasco‐Olmo · 2020 · Cited by 5 — Fatigue crack growth rate has been also numerically modelled using CTOD as the characterising parameter. Gu and Ritchie15 used a geometric crack tip blunting .... by V Levkovitch · 2005 · Cited by 28 — The sliding-off mechanism associates crack extension with blunting of the crack tip during loading followed by re-sharpening upon unloading. The fatigue crack .... by RO Ritchie · 1999 · Cited by 810 — ... of fatigue-crack growth as a mutual competition between intrinsic mechanisms of crack advance ahead of the crack tip (e.g., alternating crack-tip blunting and ...
fatigue tip blunting
by N Micone · 2015 · Cited by 5 — loading” Theor Appl Mech, vol. 44, pp. 105 – 115, 2005. [15] - V. Tvergaard, “Effect of underloads or overloads in fatigue crack growth by crack tip blunting” Eng .... by NII Mansor · 2017 · Cited by 5 — Discerning the Fatigue Crack Growth Behavior of API X65 Steels Under Sequence ... It is presumed, the Kmax causing the rupture of crack tip bonds while (K ... blunting and sharpening of crack tip and cyclic strain hardening and softening .... by V Tvergaard · 2004 · Cited by 103 — One of the basic mechanisms for fatigue crack growth in ductile metals is that depending on crack-tip blunting under tensile loads and re-sharpening of the .... Mesh sensitivity effects on fatigue crack growth by crack-tip blunting and re-sharpening | Viggo Tvergaard | download | BookSC. Download books for free.. Topics include stress intensity factors, fracture toughness, Linear Elastic Fracture Mechanics (LEFM), and others. ... Fatigue Crack Growth ... The plastic deformation causes blunting of the crack tip which increases the radius of curvature and ...
by LL Fischer · 2001 · Cited by 75 — These calculations are carried out for various crack tip geometries to ascertain the effects of crack tip ... configuration that is analytically tractable is used to simulate crack tip blunting at the ... Argon, A.S. (Ed.), Topics in Fracture and Fatigue.. by P CHOWDHURY · 2016 · Cited by 87 — CTOD, FCG = crack tip opening displacement, fatigue crack growth ... 7 Stage II fatigue crack growth due to blunting/re-sharpening via slip emission by Laird.38, .... Crack tip deformation fields and fatigue crack growth rates in Ti–6Al–4V | Alexander M. Korsunsky; Xu Song; Jonathan Belnoue; Terry Jun; Felix Hofmann; Paulo .... THE RELATION BETWEEN CRACK BLUNTING AND FATIGUE CRACK ... Numerical validation of crack closure concept using non-linear crack tip parameters.. by AJ McEvily · 1992 · Cited by 102 — Fatigue striations are observed in air but are absent in vacuum. It is proposed that the greater extent of blunting in vacuum is responsible for the .... by F BUMBIELER — The evolution of crack tip blunting can now be plotted versus the applied SIF during a fatigue cycle (figure. 9). During the first part of the curve (0→1), there is no .... shown in the previous chapter is that any single cycle of fatigue is introducing in ... Under conditions of corrosion fatigue the crack tip doesn't open and blunt as.. 4.1 Principle of corrosion fatigue crack propagation testing ... operation, corrodent remaining at the crack tip may promote blunting due to corrosive attack.. by RO RITCHIE · 1999 · Cited by 829 — 3.2.2. Extrinsic mechanisms. Although the primary mechanism motivating fatigue-crack extension in ductile materials, i.e., crack-tip blunting and resharpening, .... by R Pippan · 2017 · Cited by 135 — Keywords: fatigue crack growth, oxide‐induced crack closure, ... cycle is usually caused by plastic blunting and re‐sharpening of the crack tip,2, 3, 4, 5, 6, 7, 8, ... Hence, the cyclic plastic zone, the cyclic plastic strain in front of the crack tip and .... by V Igwemezie · 2020 — In SW, the degree of the electrochemical dissolution of the microplastic zone (or crack-tip blunting) appears to be an additional factor influencing .... [22]Tvergaard, V., On fatigue crack growth in ductile materials by crack-tip blunting, J. Mech. and Phys. of Solids, Vol. 52, 2004, pp. 2149-2166. [23] Tvergaard, V.. Crack tip blunting [15]. 2. Crack tip strain hardening [16]. 3. Irregular crack front [12,17,18]. 4. Residual compressive stresses ahead of crack tip [19]. 5.. by AE Heeter · 2014 — Crack tip blunting also frequently occurs in time dependent fatigue crack growth and can act to limit the crack propagation. This is another .... by T Weerasooriya · 1980 · Cited by 2 — The fatigue and creep crack growth rates of Hastelloy X were examined both in ... Because of the large deformations at the crack tip, blunting occurs with large .... by MF Borges · 2020 · Cited by 1 — This approach includes not only the effects of cyclic plastic deformation, but also crack tip blunting, material hardening and plasticity-induced .... Nov 12, 2013 — Crack propagation in fatigue occurs via a mechanism of alternating crack-tip blunting and resharpening, which leads to the formation of the .... ... and hardening–softening–hardening solids using the crack tip blunting model ... tip stress–strain variables and the experimental trends of the fatigue crack .... by F Luo · 2014 · Cited by 97 — Pure shear test showed crack blunting at the notched tip and a large ... Fatigue Resistance, Notch-Insensitivity, and Self-Healing Properties.. by JM Hunnell · 2009 · Cited by 11 — In ductile metals one of basic mechanisms for fatigue crack growth is that based on crack-tip blunting under the maximum load and re-sharpening of the crack-tip .... by BB Verma · 2020 · Cited by 14 — A fatigue crack can be effectively retarded by heating a spot near the crack tip under nil remote ... Spot heating; overloading; fatigue crack growth retardation; residual stress; delay cycles ... tude results into crack deflection and crack tip blunting.. by C Feichter · 2006 · Cited by 8 — The influence of the initial crack-tip radius on the fatigue behavior and the strain distribution in the vicinity of the blunted crack tip was .... by SY Lee · 2011 · Cited by 44 — The combined effects of overload-induced enlarged compressive residual stresses and crack tip blunting with secondary cracks are suggested to be responsible .... by SPC Reddy · 2015 — 72. 3.2 Shows crack-tip opening displacement (CTOD), crack tip blunting angle. (CTBA) and crack growth rate (da/dN) in vacuum, air and 3.5%NaCl for (A) .... by D Kujawski · 2015 — In this article, we attempt to model how crack extension interplays between a crack-tip opening and crack-tip blunting angle associated with the .... by CS Lin · 1988 · Cited by 3 — The fracture toughness and fatigue crack growth in the welding zone and in the ... ciated with crack-tip blunting prior to crack tearing of the weldment: J = 2 Oy Aa.. May 1, 2019 — specimen or component surface, since most fatigue cracks originate in this region.” Use ... plastic blunting of the crack tip. A crack tip amenable .... Abstract Crack-tip blunting under tensile loads and re-sharpening of the crack-tip during unloading is one of the basic mechanisms for fatigue crack growth in .... One of the basic mechanisms for fatigue crack growth in ductile metals is that depending on crack-tip blunting under tensile loads and re-sharpening of the .... by P Ljustell · 2007 · Cited by 3 — Plastic defor- mation precedes the fracture and the initially sharp crack tips are blunted. The plastic deformation increases with increasing fracture toughness and.. by S Singh · 2018 · Cited by 8 — On fatigue crack growth in plastically compressible hardening and hardening–softening–hardening solids using crack-tip blunting.. Jul 1, 2019 — Crack tip opening displacement (CTOD); fatigue crack growth rate; DIC ... Crack tip blunting at maximum load and the crack tip re-sharpening at .... by Y Yamaguchi · 2013 · Cited by 6 — The stress distribution in front of crack tip and crack blunting were estimated by FEM analyses. After the crack tip was blunted by the excessive tensile loading, the .... by 박흥배 · 1996 — Fatigue crack propagation of materials considering crack tip plasticity was ... reduce fatigue crack growth rate (FCGR) of Inconel 690 by crack tip blunting as far .... Nov 30, 2018 — The crack tip stresses cause plastic deformation leading to energy consumption at the crack tip. This results in blunting of the crack, which means .... by Y Mittal · 2020 · Cited by 1 — The combination of softening or softening-hardening material response and plastic compressibility leads to major deviations in crack tip blunting .... Papers by Keyword: Fatigue Crack Tip Blunting ... Abstract: Abstract: Based on the cyclic elasto-plastic HRR field near the crack tip under the cyclic loading, .... The following contribution deals with the growth of cracks in low-cycle fatigue ... based on the mechanism of time dependent elastic–plastic crack tip blunting is .... by HG Wheatley · 2001 — A tensile overload enhances the fatigue damage ahead of the crack tip. ... Crack tip blunting has two opposing effects upon the fatigue crack growth rate.. Effects of crack tip blunting and residual stress on a warm pre-stressed crack specimen. M.R. Ayatollahi *, M. Mostafavi. Fatigue and Fracture Laboratory, .... Paris Relationship: Integration · Fatigue crack propagation in an AISI 4140 steel. · Fatigue crack propagation rates for a number of polymers.. by K HIRAO · 1987 · Cited by 65 — In previous papers, it was shown that when abraded high‐silica glass is soaked in hot water or annealed in air, its crack tip becomes blunt. The dynamic fatigue .... by F Galland · 2011 · Cited by 6 — 1 Fatigue crack growth analysis: challenges and methods. 5. 1. Linear elastic ... representation of the plastic blunting at the crack tip. For that .... by M Maziere · Cited by 8 — Abstract The propagation of a fatigue crack in 2D specimens by crack tip plastic blunting is simulated by using a Finite Element implementation of the strip-yield .... by HB Park · 1996 — Fatigue crack propagation of materials considering crack tip plasticity was ... reduce fatigue crack growth rate (FCGR) of Inconel 690 by crack tip blunting as far .... by V Tvergaard · 2007 · Cited by 9 — Detailed numerical studies of crack-tip blunting under cyclic loading have been carried out in the last few years (Gu and Ritchie, 1999, Tvergaard and Hutchinson, .... ... life demands consideration of at least three load interaction phenomena - fatigue crack closure, near-tip residual stress and crack-tip blunting/re-sharpening.. Abstract One of the basic mechanisms for fatigue crack growth in ductile metals is that depending on crack–tip blunting under tensile loads and re-sharpening of .... ... intensity factors (SIF) and the pseudo-SIFs of fatigue cracks on the presence of crack closure, crack tip plasticity and blunting are presented and evaluated.. Electrochemical fatigue crack treatment by konstantin dolgan, b. Known as crack tip blunting, a counterintuitive method of reducing one of the worst types of stress .... by A YAMAUCHI · 2012 · Cited by 3 — The effects of an overload on fatigue crack growth behavior have been investigated by using carbon ... tensile residual stress was distributed in front of the crack tip. ... from the viewpoints of the compression stress and blunting of the crack tips.. This page provides the chapter on plastic yielding at the tip of a crack from Wang, C. H.. ... To determine the plastic zone at the crack tip, Irwin presented a simple model ... crack growth to occur there first, under both static and fatigue conditions. ... at crack tip, the originally point sharp crack tip would become blunt (otherwise .... by K Makhlouf · 1993 · Cited by 56 — threshold fatigue crack growth rates and increase Mqth. s'6. Also, for lower-strength materials, crack-tip blunting at elevated temperatures can reduce crack .... by I Gu · 1999 · Cited by 25 — KEY WORDS: fatigue crack growth, cyclic crack-tip plasticity, crack tip opening, displacement (CTOD), crack-tip blunting. Introduction. Although the question of a .... by D Cojocaru · Cited by 31 — gested fatigue crack growth using plastic dissipation as a criterion in 1967. ... Because these elements participate in ''crack-tip blunting”, the dissipated energy.. by POK Boman · 1992 · Cited by 1 — Present available and used methods to predict fatigue crack growth are essentially ... 2.2 Crack Tip Blunting and Crack-Tip-Opening-Displacement (CTOD)... 10.. REFERENCE: Gu, I. and Ritchie, R. O., "On the Crack-Tip Blunting Model for Fatigue Crack Propagation in Ductile Materials," Fatigue and Fracture Mechanics: .... The basic mechanism of alternate shear ruptures was adapted to fatigue crack tip blunting, striation formation, and fatigue crack growth by McEvily [11], Laird .... by R Long — This may lead to crack tip blunting and significant nonlinear effects at the crack tip ... Understanding fatigue fracture in soft materials is of central .... by VM Barker · 2011 · Cited by 2 — THERMO-MECHANICAL FATIGUE CRACK GROWTH MODELING OF A NICKEL ... as identified by Skorupa are crack tip blunting, residual stresses ahead of the .... by JTP de Castro · 2009 · Cited by 29 — with fatigue crack propagation rates (controlled by the stress intensity range DK) ... matching the HRR strain at the blunt crack tip with the strain pre- dicted at that .... In ductile metals, one of the basic mechanisms for fatigue crack growth is that associated with crack-tip blunting under the maximum load and re-sharpening of .... SIMULATION OF FATIGUE CRACKGROWTH BY CRACK TIP BLUNTING P. Hutar and M. Sauzay Commissariat a l'Energie Atomique (CEA) Bat.455, 91 191 .... A basic mechanisms for fatigue crack growth in ductile metals is that depending on crack-tip blunting under tensile load.... by L Ma · Cited by 9 — The initial crack tip blunting eliminated any difference in the stable crack growth responses of frac- ture specimens with saw cut and fatigue .... by GP Potirniche · 2005 · Cited by 53 — more evenly distributed plastic region around the crack tip. ... Keywords: Persistent slip bands; Fatigue crack growth; Nickel; Copper; Single crystal; Molecular dynamics. 1. ... blunting as in the previous case of orientation B. Orientation.. Crack tip blunting (make hole at crack tip) may be leads to the following advantages [14] :1. Blunting the crack tip is vital for changing the material behavior to .... by D Liu · 2018 · Cited by 7 — Keywords: creep fatigue; crack growth; grain boundary. 1. ... tip becomes blunt and grows longer because a new crack surface is created.. In their view, the fatigue crack extension results solely from the different ... off mechanism associates crack extension with blunting of the crack tip during loading .... by RJ Connor · 2017 · Cited by 4 — method for repair and retrofit of steel bridge fatigue. Drilling a large radius hole at the tip of the crack increases the blunting effect of the crack tip significantly, .... Aug 9, 2010 — Although the primary mechanism motivating fatigue-crack extension in ductile materials,. i.e., crack-tip blunting and resharpening, is intrinsic .... by GR Doelp · 1984 · Cited by 8 — The second half of this study deals with the blunting of fatigue cracks by melting a ... CHAPTER 4: ELECTROMAGNETIC CRACK TIP BLUNTING 87. 4.1 BASIC .... by P Hutar · 2006 — The crack tip blunting and re-sharpening on the crack tip is one of the basic mechanisms for fatigue crack growth in ductile metals and alloys, e.g. Laird [1], .... Two classes of models have been proposed to derive the power law of fatigue crack propagation: crack-tip blunting and sharpening models and damage ...
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