Results 211 to 220 of about 18,001 (260)

Effect of Shot Peening Pretreatment on the Fatigue Behavior of AA5052/SPFC440 Self-Piercing Riveted Joints. [PDF]

Materials (Basel)
Zhou Z, Ji X, Huang Z, Gu X, Zhang Y.
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Analysis of heat transport in rough rock fractures under multiple surface roughness.

González-Fuentes, S., Vilarrasa, Víctor, Andrés, S., De Simone, Sílvia   +3 more
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The Effect of Fracture Surface Roughness on Propped Fracture Conductivity Using 3D-Printed Fracture Surfaces

SPE Western Regional Meeting, 2023
Abstract When rocks are fractured in tension, the fracture surfaces created are rough, with a wide range of surface morphologies possible. In previous studies of propped fracture conductivity using fractured samples, the fracture surface topography was found to have a strong influence on fracture conductivity and stimulation efficiency ...
Carrie Sistrunk, Andrew Travis Brashear, Dan Hill, Ding Zhu, Tohoko Tajima   +4 more
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Research on the anisotropic fracture behavior and the corresponding fracture surface roughness of shale

Engineering Fracture Mechanics, 2021
Abstract Understanding the anisotropic fracture mechanism of shale is of significance to assess the development of a stimulated reservoir volume. In this study, three-point bending tests were carried out using notched deep beam specimens of shale with 7 different bedding dip angles to investigate the anisotropic fracture behavior.
Li Ren, Heping Xie, Cunbao Li
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Surface roughness of anisotropic fracture surfaces

Materials Characterization, 1993
Abstract A new assumption-free method has recently been developed for estimating the surface roughness parameter ( R s ) of fracture surfaces regardless of the relative extent of isotropy or anisotropy exhibited. An overview of the new method, as well as certain statistical aspects associated with sampling procedure, are presented.
A. Gokhale, W.J. Drury
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On the universality of fracture surface roughness

Europhysics Letters (EPL), 1996
We measure the roughness of fracture surfaces generated in uniaxial tension for model materials in two and three dimensions. We study the effect of disorder, of anisotropy of material properties and of dimensionality on surface roughness. Although the roughness exponent ζ is always found within a narrow range, its value systematically decreases as the ...
Xiaodong Zhang, M. A Knackstedt, D. Y. C Chan, L Paterson   +3 more
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Fracture surface micro-roughness

Scripta Metallurgica, 1984
The small-scale roughness of a fracture surface (a scale typically of a few micrometers) has been of interest for some time. That interest has received an impetus in recent years because it relates to mechanisms of fatigue crack propagation mechanisms determining the fracture toughness and mechanisms of creep fracture.
A.W. Thompson, M.F. Ashby
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Nonuniversality of roughness exponent of quasistatic fracture surfaces

Physical Review E, 2012
Numerous experiments have indicated that the fracture front (in three dimensions) and crack lines (in two dimensions) in disordered solids and rocklike materials is rough. It has been argued that the roughness exponent ζ is universal. Using extensive simulations of a two-dimensional model, we provide strong evidence that if extended correlations and ...
Mehdi, Ansari-Rad, S Mehdi Vaez, Allaei, Muhammad, Sahimi   +2 more
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Elastic Contact on Rough Fracture Surfaces

Europhysics Letters (EPL), 1993
There is now ample evidence that fracture surfaces are self-affine. The elastic contact on such surfaces is expected to give rise to a power law dependence of the normal force on the penetration depth, whose exponent α depends on the roughness index of the surface, ζ.
K. J Måløy, Xiao-Lun Wu, A Hansen, S Roux   +3 more
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Fracture surfaces: Apparent roughness, relevant length scales, and fracture toughness

Physical Review B, 1994
The Griffith criterion is rewritten to account for the propagation of a self-affine crack. It is shown that the stress-field singularity in the close vicinity of the crack tip involves an exponent -(${\mathit{d}}_{\mathit{F}}$-1)/2 instead of -1/2. Furthermore, the fracture toughness is shown to be related to the ratio of the maximum height ${\mathit{z}
, Bouchaud, , Bouchaud
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