Results 11 to 20 of about 18,001 (260)
Roughness of fracture surfaces [PDF]
Europhysics Letters (EPL), 2000 We study the fracture surface of three dimensional samples through a model for quasi-static fractures known as Born Model. We find for the roughness exponent a value of 0.5 expected for ``small length scales'' in microfracturing experiments. Our simulations confirm that at small length scales the fracture can be considered as quasi-static. The isotropy
Parisi A., Caldarelli G., Pietronero L.
openaire +4 more sources
Anomalous roughness of fracture surfaces in 2D fuse models [PDF]
International Journal of Fracture, 2008 We study anomalous scaling and multiscaling of two-dimensional crack profiles in the random fuse model using both periodic and open boundary conditions. Our large scale and extensively sampled numerical results reveal the importance of crack branching and coalescence of microcracks, which induce jumps in the solid-on-solid crack profiles.
Nukala PKVV +3 more
openaire +5 more sources
Hydrodynamic descriptions for surface roughness in fracture front propagation [PDF]
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2018 Fracture is ubiquitous in a crystalline material. Inspired by the observed phenomenological similarities between the spatial profile of a fractured surface and velocities in hydrodynamic turbulence, we set up a hydrodynamic description for the dynamics of fracture surface propagation mode I or opening fracture front.
Abhik Basu, Bikas K. Chakrabarti
openaire +3 more sources
Surface Roughness and Fracture Strength of Heat-pressed Lithium Disilicate Veneers using Different Surface Treatments: An In Vitro Study [PDF]
International Journal of Prosthodontics and Restorative DentistryPurpose: The purpose of this study was to evaluate the effect of sodium hypochlorite (NaOCl) as an etching agent following phosphoric acid (PA) and hydrofluoric acid (HF) etching on the fracture strength and surface roughness of lithium disilicate ...
Sandhia Sundaram +2 more
doaj +1 more source
Measurement of Coal Fracture Surface Roughness.
Shigen-to-Sozai, 1991 In this paper, the fracture surface roughness of coal samples from the four coal mines in Hokkaido was measured and analyzed. The main results obtained are summarized as follows:(1) The surface of the coal fracture is a random surface varying in some places smooth and others jagged.
ZHANG, Xuntao, HIGUCHI, Kiyoshi
openaire +2 more sources
Longevity of ceramic restoring materials in the confection of endocrowns restorations: an in vitro study on surface roughness and mechanical strength [PDF]
RGO: Revista Gaúcha de Odontologia, 2023 Objectives: The objective was to evaluate the longevity of ceramic restorative materials in the manufacture of endocrown restorations, through an in vitro study on surface roughness and mechanical strength.
Clarisse Maria Luiz SILVA +5 more
doaj +1 more source
Experimental and numerical studies on non-Darcian flow in single rough-walled rock fracture
Yantu gongcheng xuebao, 2023 A series of rough-walled rock fracture specimens with specific surface roughnesses are made by using the three- dimensional carving. After that, the self-designed apparatus which can quantitatively change the aperture of single rock fracture is adopted ...
ZHU Yinbin 1, LI Changdong 1, 2, ZHOU Jiaqing 1, 2, XIANG Linyu 1, YU Habin 1, CHEN Wenqiang 1
doaj +1 more source
Roughness Scaling of Fracture Surfaces in Polycrystalline Materials [PDF]
MRS Proceedings, 2004 AbstractThe roughness scaling of fracture surfaces in two-dimensional grain boundary networks is stud- ied numerically. Grain boundary networks are created using a Metropolis method in order to mimic the triple junction distributions from experiments.
Seppäl, Eira T. +4 more
openaire +1 more source
Influence of multiscale surface roughness on permeability in fractures
Physical Review Fluids, 2022 We systematically study the role of surface roughness in fluid flow through rough fractures using direct numerical simulations. Random rough fractal surfaces are generated with different relative roughness, which are then decomposed using the wavelet analysis method.
Wang, Zhongzheng +4 more
openaire +3 more sources
Roughness of oxide glass subcritical fracture surfaces [PDF]
Journal of the American Ceramic Society, 2017 Abstract An original setup combining a very stable loading stage, an atomic force microscope and an environmental chamber, allows to obtain very stable subcritical fracture propagation in oxide glasses under controlled environment, and subsequently to finely characterize the nanometric roughness properties of the ...
Pallares, Gael +6 more
openaire +3 more sources