Results 221 to 230 of about 9,782,361 (275)
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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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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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THE EFFECTS OF CLOSURE OF CRACKS ON THE DYNAMICS OF A CRACKED CANTILEVER BEAM
Journal of Sound and Vibration, 2000The paper develops a finite element scheme for computing the eigensystem for a cracked beam for different degrees of closure. Previous work in the authors' laboratories has indicated that the ability to extend the use of mode superposition to model breathing conditions in the crack zone would overcome the need to switch from a frequency-domain-based ...
M. KISA, J. BRANDON
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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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The effect of crack closure on the reliability of NDT predictions of crack size
NDT & E International, 1987Abstract The aim of this work is to investigate the effect of crack closure on the reliability of NDT predictions of crack size. Tests are performed on mild steel plate specimens each possessing a fatigue crack. The amount of crack opening or closure is controlled using a specially built four-point bending rig.
R. Clark, W.D. Dover, L.J. Bond
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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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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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Effect of Crack Closure on Magnitude of Modulated Wave
International Journal of Structural Stability and Dynamics, 2020Fatigue cracks generated by repeated loads cause structural failures. Such cracks grow continuously and at an increasing speed owing to the concentration of stresses near the crack tips. Therefore, the early detection of fatigue cracks is imperative in the field of structural-health monitoring for the safety of structures exposed to dynamic loading ...
Sang Eon Lee, Jung-Wuk Hong
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