Results 251 to 260 of about 58,869 (302)
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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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A model for characterizing crack closure effect of rocks
Engineering Geology, 2015Abstract When there are large amounts of microcracks in the rock, they influence the rock strength and deformation significantly. The crack closure behavior in compression tests and its quantitative characterization are studied in this paper.
Jun Peng +3 more
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Effect of crack closure on gear crack propagation
International Journal of Fatigue, 2001Computational and experimental studies were performed in order to investigate the propagation of cracking in a spur gear tooth. The stress intensity factors were numerically calculated by the definition of weight functions and by finite element analysis.
GUAGLIANO, MARIO, VERGANI, LAURA MARIA
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Effect of crack closure on crack initiation parameters
Engineering Fracture Mechanics, 1986Young’s modulus shear modulus elastic constant : 3 -4y plane strain ; 3 -r/l + y plane stress force per unit thickness of plate open end mode I stress intensity factor open end mode II stress intensity factor Poisson’s ratio applied uniform tension, 2p/k + 1 distance of concentrated force from centre line of crack maximum normal stress minimum strain ...
R.S. Alwar, S. Thiagarajan
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Closure Effects on Fatigue Crack Detection
Journal of Engineering Mechanics, 1999An experimental study of crack closure and its effects on the vibration of a simple beam shows that both frequency and damping changes due to the crack are influenced significantly, to the point of being obscured in some cases. The nonlinearity induced by crack closure is also explored.
Wuzhen Zhang, Rene B. Testa
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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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