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An experimental investigation into surface roughness of a hydraulic fracture
The APPEA Journal, 2018The fracture surface roughness is an essential characteristic of the hydraulic fracturing process and has not been fully explored. The surface asperities play a significant role in proppant flow and settlement, fluid leak-off and fracture tip movement. In this study, we performed an experimental investigation to evaluate the fracture surface roughness ...
Abbas Movassagh +4 more
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Fracture surface of plastic materials: the roughness exponent
Polymer, 2002In order to provide more evidence concerning the controversial topic, conjectured for the first time in the early 90’s, that the roughness exponent of the self-affine fracture surfaces has a value close to 0.8, the self-affine behavior of fracture surfaces of both, semi-crystalline polypropylene (PP) and amorphous polystyrene (PS) was analyzed.
Virgilio Gonzalez
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Prediction of Ductile Fracture Surface Roughness Scaling
Journal of Applied Mechanics, 2012Experimental observations have shown that the roughness of fracture surfaces exhibit certain characteristic scaling properties. Here, calculations are carried out to explore the extent to which a ductile damage/fracture constitutive relation can be used to model fracture surface roughness scaling.
Alan Needleman +2 more
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Fracture surface roughness in highly deformable polymers
Journal of Materials Science, 1978The fracture surface roughness was determined for five highly deformable polymers (styrene-butadiene rubber, two ethylene-propylene rubbers, low density polyethylene and plasticized polyvinyl chloride) as a function of rate and temperature. The mechanical hysteresis for the same materials was also measured as a function of rate, temperature and strain ...
Y. Fukahori, E. H. Andrews
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The effects of surface roughness on the flow in multiple connected fractures
Fluid Dynamics Research, 2022Abstract We present a novel computationally efficient approach for investigating the effect of surface roughness on the fluid flow in small discrete fracture networks at low Reynolds number. The effect of parallel and series fracture arrangements on the flow rate and hydraulic resistance was studied numerically by patching Hele-Shaw ...
Pouria Aghajannezhad, Mathieu Sellier
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The effect of loading rate on ductile fracture toughness and fracture surface roughness
Journal of the Mechanics and Physics of Solids, 2015Abstract The variation of ductile crack growth resistance and fracture surface roughness with loading rate is modeled under mode I plane strain, small scale yielding conditions. Three-dimensional calculations are carried out using an elastic–viscoplastic constitutive relation for a progressively cavitating solid with two populations of void ...
Shmuel Osovski +2 more
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Image-Based Characterization of Fracture Surface Roughness
MRS Proceedings, 1994AbstractAnalysis of images from SEM, optical and confocal microscopes provides insight into the roughness of fracture surfaces of cement-based materials. Several techniques including 3D surface reconstruction and 2-D vertical contour analysis are compared.
A.B. Abell, D.A. Lange
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Transient film flow on rough fracture surfaces
Water Resources Research, 2000Transient film flow in unsaturated fractures was investigated conceptually and experimentally. By considering films on fracture surfaces as analogs to water in partially saturated porous media, the film hydraulic diffusivity and equation for transient film flow are obtained from their porous medium counterparts, the hydraulic diffusivity and the ...
Tetsu K. Tokunaga +2 more
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Relationships between fracture parameters and fracture surface roughness of brittle polymers
International Journal of Fracture, 1991Fracture parameters such as crack velocity a, stress intensity factor Kd and a specific crack extension resistance R* were measured for Homalite-100, PMMA and epoxy in the course of fast crack propagation using a Cranz-Schardin type high speed camera.
K. Arakawa, K. Takahashi
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Roughness characterization of fractures surfaces
2006This paper presents a comparative study of various methods of roughness quantification applied to rock fractures. The parameters which are discussed and used for comparing 7 types of rock and two failure mode are : arithmetic mean value, quadratic mean value (and standard deviation of peaks heights), JRC and estimations of the fractal dimension by the ...
Legrain, Hughes, Tshibangu, Katshidikaya
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