Results 201 to 210 of about 37,565 (257)

Fracture Process Zone of Concrete

Journal of Engineering Mechanics, 1985
Double displacement compliance and replica techniques were used to determine the macro and total crack lengths, respectively in nineteen crack-line wedge-loaded, double cantilever beam (CLWLDCB) mode I concrete specimens. Details of the fracture process zone, which lies between the macro and hairline crack tips, were determined through numerical ...
A. S. Kobayashi, N. M. Hawkins, D. B. Barker, B. M. Liaw   +3 more
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Fracture energy and fracture process zone

Materials and Structures, 1992
The fracture energy Gf can be determined following a RILEM recommendation. However, it has been found that fracture energy depends on both size and geometry of the test specimen. The underlying fictitious crack model postulates that fracture energy, tensile strength, the critical opening of the fictitious crack, and the shape of the softening curve ...
X. -Z. Hu, F. H. Wittmann
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Fracture process zone and fracture energy of heterogeneous soft materials

Journal of the Mechanics and Physics of Solids
Zhengjin Wang
exaly   +2 more sources

Fracture process zone in granite: a microstructural analysis

International Journal of Earth Sciences, 2001
Shear fracture propagation in rock is accompanied by localized microcracking in a process zone surrounding the fracture tip. We investigated the crack microstructures along experimentally formed shear fractures from four granite samples (uniaxial compression tests).
Janssen, C., Wagner, F., Zang, A., Dresen, G.   +3 more
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The fracture process zone in mode I fracture emanating from notch and plastic zone size

Materials Today: Proceedings, 2021
Abstract In the linear mechanics of fracture from notch, the volumetric approach assumes that the rupture occurs in a cylindrical physical volume. This article highlights the hypothesis of this approach from the experimental results. According to this approach, the area of development of the fracture is characterized by its diameter called the ...
Mouna Fakir, Hassan El Minor
openaire   +1 more source

Fracture Process Zone of a Concrete Fracture Specimen

1989
For concrete three-point bend specimens Moire interferometry was used to locate the micro-crack tip and to measure the crack opening displacement (COD) along the fracture process zone preceeding that tip. The COD data was used as input to a finite element model which was then executed in its generation mode, to yield crack closure forces along the ...
J. J. Du, A. S. Kobayashi, N. M. Hawkins
openaire   +1 more source

Development of fracture process zones in concrete

Magazine of Concrete Research, 1990
Concrete specimens have been tested in uniaxial tension using a closed loop servo-controlled testing machine. The combination of extension control and stiff testing frame has allowed stable failure to be achieved and the full post-peak portion of the load/extension relationship to be obtained.
M. E. Raiss, J. W. Dougill, J. B. Newman
openaire   +1 more source

On the role of the process zone in dynamic fracture

Journal of the Mechanics and Physics of Solids, 1996
The evolution of the fracture process zone and its influence on dynamic crack propagation are investigated using a simple constitutive assumption to model the material in the fracture process zone. The mode III problem of anti-plane shear is examined using a finite difference scheme to obtain the full field solution.
B. Yang, K. Ravi-Chandar
openaire   +1 more source

Fracture process zone in cementitious materials

International Journal of Fracture, 1991
The current work is directed to the measurement and prediction of the fracture process zone (FPZ) with the compliance method. The method is renovated with a multi-cutting technique. A new compliance curve C p is established while FPZ in a damaged specimen is removed stepwise by saw-cutting.
Folker H. Wittmann, Xiaozhi Hu
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Formation of the fracture process zone in concrete

Engineering Fracture Mechanics, 1990
Abstract 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
openaire   +1 more source