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Cohesive crack analysis of size effect
Engineering Fracture Mechanics, 2009Abstract This paper deals with the analysis of size effect in concrete. An extensive campaign of accurate numerical simulations, based on the cohesive crack model, is performed to compute the size effect curves (CSEC) for typical test configurations.
Gianluca Cusatis
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Ultrasonic sizing of short surface cracks
Ultrasonics, 2007This paper presents a method for ultrasonic sizing of surface cracks based on time domain and frequency domain Rayleigh wave near-field analysis. The procedure allows for the entire range of ratio of crack depth to Rayleigh wavelength a/lambda to be covered with one single measurement. In the time domain the time-of-flight method was extended to cracks
Masserey B, Mazza E
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The influence of crack size on the fracture behaviour of short cracks
International Journal of Fracture, 1990Crack size effects are investigated by applying local fracture criteria at a specific distance ahead of a crack tip, related to the material’s microstructure. For sufficiently long cracks, the criteria are applied at points within the singularity-dominated region and then failure corresponds to the attainment of a critical intensity of the singularity ...
G. Harlin, J. R. Willis
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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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Punching shear of slabs: crack size and size effects
Magazine of Concrete Research, 2002Fictitious crack model assumptions and equilibrium equations were used to develop a numerical model in order to predict the punching load and the deformations of reinforced concrete slabs. Concrete strength, aggregate type, reinforcement ratio as well as the fracture strength properties were taken into account in developing the new model.
H. Marzouk, M. Osman, A. Hussein
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Detecting Type and Size of Road Crack with the Smartphone
22017 IEEE International Conference on Computational Science and Engineering (CSE) and IEEE International Conference on Embedded and Ubiquitous Computing (EUC), 2017Detecting crack type and crack size is crucial for road maintenance and management. Mobile crowd sensing is a new way to collect the information of cracks on roads. We propose a system named CrackDetector to detect cracks and estimate their types and size with smart phone in this paper.
Yingying Kong +5 more
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Material grain size and crack size influences on cleavage fracturing
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2015A review is given of the analogous dependence on reciprocal square root of grain size or crack size of fracture strength measurements reported for steel and other potentially brittle materials. The two dependencies have much in common. For onset of cleavage in steel, attention is focused on relationship of the essentially athermal fracture stress ...
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MRS Proceedings, 1994
AbstractTwo aspects of fast cracks are considered: 1. the terminal velocity, and corresponding relative kinetic energy; 2. the grain size dependence of the fracture. It is argued that this is determined by the kinetic energies of cracks when they have expanded enough to reach the boundaries of the grains in which they lie.
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AbstractTwo aspects of fast cracks are considered: 1. the terminal velocity, and corresponding relative kinetic energy; 2. the grain size dependence of the fracture. It is argued that this is determined by the kinetic energies of cracks when they have expanded enough to reach the boundaries of the grains in which they lie.
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Size Effects on Quasi-Static Growth of Cracks
SIAM Journal on Mathematical Analysis, 2005Summary: We perform an analysis of the size effect for quasi-static growth of cracks in isotropic linearly elastic bodies under antiplanar shear. In the framework of the variational model proposed by \textit{G. A. Francfort} and \textit{J. J. Marigo} in [J. Mech. Phys.
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Plastic zone size in fatigue cracking
International Journal of Pressure Vessels and Piping, 1996Fatigue tests were performed on the specimens of Type 304 stainless steel and Inconel 718. To investigate the effects of specimen thickness on crack tip deformation and fatigue crack growth rate (FCGR), specimens of different thickness were used. To validate fatigue crack propagation in terms of plastic zone size, elastic plastic fracture mechanics ...
Heung-Bae Park +2 more
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