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Fracture process zone associated with mixed mode fracture of SiCw/Al2O3
Journal of Non-Crystalline Solids, 1994Abstract An experimental-numerical analysis based on moire interferometry and static finite-element analysis was used to study the trailing fracture process zone of a SiCw/Al2O3 precracked, three-point bend specimen subjected to mixed-modes I and II loading.
Chang-Te Yu, Albert S. Kobayashi
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The Fracture Process Zone in Concrete
1991A number of different experimental techniques have been used to try to determine: (1) whether a process zone exists in concrete; (2) if it does, what its dimensions might be; and (3) whether it is a fundamental material property. From an extensive review of the literature, it would seem that not only the apparent size of the process zone, but its very ...
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Influence of fracture process zone height on fracture energy of concrete
Cement and Concrete Research, 2004Abstract The implication of modelling concrete fracture with a fictitious crack of zero fracture process zone (FPZ) height is addressed because FPZ height, in reality, is not zero and is bound to vary during crack growth. The ligament effect on fracture energy G F is explained by the nonuniform distribution of a local fracture energy g f ...
Hu, Xiaozhi., Duan, Kai.
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Further studies on fracture process zone for mode I concrete fracture
Engineering Fracture Mechanics, 1993The development of a fracture process zone associated with stable crack growth in single edge-notched (SEN), three-point bend concrete specimens of different tensile strengths was monitored with moire interferometry. The experimental data was then used to drive a finite element model of the fracture specimen in its generation/propagation mode and to ...
null Zhi Kai Guo +2 more
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Fracture Mechanics Parameters and Fracture Process Zone of Concrete
1987The initiation and propagation of a continuous crack in concrete occurs after the formation at the crack front of a fracture process zone the size of which is not negligible compared to structural dimensions. The results of experimental observations are reported and proposed techniques for the analysis of crack propagation in concrete through nonlinear
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Experimental methods for determining fracture process zone and fracture parameters
Engineering Fracture Mechanics, 1990Abstract For quasi-brittle materials like concrete, rock and ceramic it is not possible to determine fracture toughness using laboratory-sized specimens and linear elastic fracture mechanics. This inapplicability of the conventional fracture mechanics is due to fracture process zone, R- curve type of behavior and precritical stable crack ...
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Evaluating rock physics–fracture mechanics relationship by quantifying fracture process zone
2022In this thesis, the length of Fracture Process Zone (FPZ) of four rock types including a red sandstone, a white coarse-grained marble, a fine-grained granite and a coarse-grained granite are quantified. The length of FPZ of a moving crack or the cohesive length 𝓁𝑐 is quantified by post mortem roughness analysis of the fracture surfaces of the studied ...
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Formation of the fracture process zone in concrete
Engineering Fracture Mechanics, 1990Abstract Formation of the fracture process zone (FPZ) in the vicinity of a notch in concrete has been studied by means of a photoelastic coating method. The tests had been performed on initially notched concrete elements under pure bending. It is shown that the maximal extent of FPZ is approximately 0.1 m and it is of the same order as beams ...
L.J. Jankowski, D.J. Styś
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Modelling rock fractures using SPH with an embedded fracture process zone
2020This research is aimed to develop an advanced computational framework that includes intrinsic spatial and temporal scales. In this computational framework, a new continuum-based constitutive model with embedded discontinuity is developed and then incorporated into the mesh-free smoothed particle hydrodynamics (SPH) method, capable of handling problems ...
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Hydrogen Diffusion Towards the Fracture Process Zone
2017Hydrogen diffusion towards the fracture process zone is examined accounting for local hardening due to geometrically necessary dislocations (GNDs) by means of strain gradient plasticity (SGP). Finite element computations are performed within the finite deformation theory to characterize the gradient-enhanced stress elevation and subsequent diffusion of
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