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Comparison of Crack Growth Models and Crack Closure Effect
Advanced Materials Research, 2011According to standard test method for fatigue crack growth rates of metallic materials, the crack growth rate of 30NCD16 at three stress ratio (R=0.1, 0.3 and 0.5) were measured. Based on linear elasticity fracture mechanics theory, the fatigue crack growth rate was studied through the nonlinear least squares fitting method.
Wen Lin Liu +4 more
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Effect of crack surface geometry on fatigue crack closure
Metallurgical and Materials Transactions A, 1995The geometry of crack faces often plays a critical role in reducing crack extension forces when crack closure occurs during fatigue crack growth. Most previous studies of fatigue crack closure are concerned with mechanical measures of closure as related to the crack growth rate; very little attention has been given to the geometry of the crack surfaces.
W. J. Drury +2 more
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Crack closure effects on fatigue damage ahead of crack tips
International Journal of Fatigue, 2019Abstract Elber’s assumed long ago that the effective stress intensity factor (SIF) range ΔKeff = Kmax − Kop is the actual driving force for fatigue crack growth (FCG), where Kop is the SIF that fully opens the crack, and his idea still is widely used to predict residual lives of cracked components.
Samuel Elias Ferreira +3 more
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Long Fatigue Cracks — Microstructural Effects and Crack Closure
MRS Bulletin, 1989Fracture mechanics technology is an effective tool for characterizing the rates of fatigue crack propagation. Generally, fatigue crack growth rate (da/dN) in each loading cycle can be presented as a function of stress intensity range (ΔK), where ΔK=Kmax—Kmin,KmaxandKminare the maximum and the minimum stress intensities, respectively.
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Elastodynamic Problem for Two Penny-Shaped Cracks: The Effect of Cracks’ Closure
International Journal of Fracture, 2008zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Menshykov, Oleksandr V., Guz, Igor A.
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The effect of infiltration induced crack closure on crack growth retardation
Scripta Metallurgica et Materialia, 1994It is now well known that extra materials on the flanks of a fatigue crack will cause premature crack closure and a reduction in crack growth rate. These extra materials may be residual plastic wake, corrosion/oxidation products, phase transformation and fluid.
Sheu, B. C. +2 more
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Cohesive modeling of fatigue crack retardation in polymers: Crack closure effect
Engineering Fracture Mechanics, 2006Abstract A numerical model of fatigue crack growth retardation in polymers induced by artificial crack closure is proposed. The approach relies on the combination of cohesive modeling and a contact algorithm incorporated in the wake of the advancing crack to account for the effect of the introduced wedge.
Spandan Maiti, Philippe H. Geubelle
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Crack Closure Effects in a Cracked Cylinder Under Pressure
2008The circumferential stress varies through the wall thickness when a cylinder is subjected to internal or external pressure. Internal pressure will induce tensile circumferential stress while external pressure compressive stress, in terms of the thick-walled cylinder theory [1].
J. Zhao, R. Liu, T. Zhang, X. J. Wu
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THE EFFECT OF ARTIFICIAL FATIGUE‐CRACK CLOSURE ON FATIGUE‐CRACK GROWTH
Fatigue & Fracture of Engineering Materials & Structures, 1993AbstractAn investigation of the effects of artificial fatigue‐crack closure on the subsequent growth of fatigue cracks, at constant range of stress‐intensity factor, was carried out for the following closure materials: (i) electroplated nickel; (ii) electroless nickel; (iii) ethylcyanoacrylate (ECA) adhesive; (iv) low‐melting point (LMP) solder. It was
A. Ur‐Rehman, P. F. Thomason
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Effects of Crack Closure on Ultrasonic Transmission
1983Ultrasonic waves are attenuated as they propagate past the tip of a crack due to the reflection of the energy at the crack face and diffraction at the crack tip. Crack closure modifies the situation since partial transmission can occur at points along the crack face where asperities come in contact.
Thompson, R. Bruce +4 more
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