Results 81 to 90 of about 111,470 (303)

Numerical and Analytical Study of Fluid Flow and Thermal Transfer in a Rough Fracture

Geofluids, 2022
The surface morphology of rough fractures significantly affects the fluid flow and heat transfer characteristics in the fractures. A thermal-flow coupling model with specific geometric fractures was established to investigate the influence of surface ...
Xiangyue Wen, Xiting Long, Zhaoying Yang
doaj   +1 more source

Anomalous roughening of wood fractured surfaces

, 1998
Scaling properties of wood fractured surfaces are obtained from samples of three different sizes. Two different woods are studied: Norway spruce and Maritime pine. Fracture surfaces are shown to display an anomalous dynamic scaling of the crack roughness.
B.B. Mandelbrot, D. Ertas, D. Ertas, E. Bouchaud, E. Bouchaud, E. Bouchaud, F. Family, Gérard Valentin, J. Feder, J. Krug, J. Planes, J. Schmittbuhl, J. Schmittbuhl, J. Schmittbuhl, J. Schmittbuhl, J.J. Mecholsky, J.M. López, J.M. López, J.M. López, J.M. López, J.P. Bouchaud, Jean Schmittbuhl, Juan M. López, K.J. Måløy, M. Schroeder, P. Daguier, P. Daguier, R.F. Voss, S. Das Sarma, S. Ramanathan, Stéphane Morel, T. Engøy, T. Halpin-Healy   +32 more
core   +1 more source

Failure mechanisms and surface roughness statistics of fractured Fontainebleau sandstone [PDF]

, 2007
In an effort to investigate the link between failure mechanisms and the geometry of fractures of compacted grains materials, a detailed statistical analysis of the surfaces of fractured Fontainebleau sandstones has been achieved. The roughness of samples
B. K. Chakrabarti, F. L. L. B. Carneiro, H. Auradou, H. Auradou, J. Feder, J. P. Hulin, L. Ponson, M. J. Alava, M. Pessel, P. M. Adler, R. Zimmerman, V. Lazarus   +11 more
core   +3 more sources

Assessing Altered Coating Adhesion on Plasma‐Deoxidized Surfaces Under Oxygen‐Free Conditions

Advanced Engineering Materials, EarlyView.
This study demonstrates the effectiveness of atmospheric pressure plasma pretreatment in modifying silicon and stainless steel surfaces to improve adhesion. Argon‐hydrogen plasma increases surface roughness and improves adhesion strength, whereas pure argon results in smoother surfaces and structural changes.
Selina Raumel, Lara Kuhr, Khemais Barienti, Sebastian Herbst, Florian Nürnberger, Hans Jürgen Maier, Marc C. Wurz   +6 more
wiley   +1 more source

New Variable Compliance Method for Estimating In-Situ Stress and Leak-Off from DFIT Data

, 2017
It is shown that using Carter leak-off is an oversimplification that leads to significant errors in the interpretation of DFIT data. Most importantly, this article reveals that previous methods of estimating minimum in-situ stress often lead to ...
Sharma, Mukul M., Wang, HanYi
core   +1 more source

Sub-surface damage issues for effective fabrication of large optics [PDF]

, 2008
A new ultra precision large optics grinding machine, BoX®has been developed at Cranfield University. BoX®islocated at the UK's Ultra Precision Surfaces laboratory at the OpTIC Technium.
, , A. Baldwin, D. Walker, G. Yu, P. Morantz, P. Shore, R. Evans, X. Tonnellier   +8 more
core   +1 more source

Productivity‐Driven Optimization of Laser Powder Bed Fusion Parameters for IN718 Superalloy: Process Control, Microstructure, and Mechanical Properties

Advanced Engineering Materials, EarlyView.
This study demonstrates how optimizing laser power, scanning speed, and hatching distance in laser powder bed fusion can boost the productivity of Inconel 718 manufacturing by up to 29% while maintaining mechanical integrity. The work delivers a validated process window and cost–time analysis, offering industry‐ready guidelines for efficient additive ...
Amir Behjat, Guido Barale, John Stavridis, Ehsan Norouzi, Jin‐Yoo Suh, Dong‐Ik Kim, Luca Iuliano, Abdollah Saboori   +7 more
wiley   +1 more source

Fracture of complex metallic alloys: An atomistic study of model systems [PDF]

, 2006
Molecular dynamics simulations of crack propagation are performed for two extreme cases of complex metallic alloys (CMAs): In a model quasicrystal the structure is determined by clusters of atoms, whereas the model C15 Laves phase is a simple periodic ...
Abraham FF, Brommer P, Chisholm MF, Ercolessi F, F. Rösch, Griffith AA, Gumbsch P, Gumbsch P, H.-R. Trebin, Henley CL, P. Gumbsch, Roth J, Roth JW, Rösch F, Rösch F, Schaaf GD, Thomson R   +16 more
core   +4 more sources

Deterministic Detection of Single Ion Implantation

Advanced Engineering Materials, EarlyView.
Focused ion beam implantation with high detection efficiencies will enable the rapid and scalable fabrication of advanced spin‐based technologies such as qubits. This work presents the detection efficiencies of a wide range of ions implanted into solid‐state hosts, with efficiencies of >90% recorded for ion species and substrate combinations of ...
Mason Adshead, Lok Kan Wan, Maddison Coke, Janet Jacobs, Nicholas F. L. Collins, Mark C. Rosamond, Richard J. Curry   +6 more
wiley   +1 more source

Velocity contrasts enhancement for shear thinning solutions flowing in a rough fracture [PDF]

, 2007
Flow and transport are studied in transparent model fractures with rough complementary self-affine walls with a relative shear displacement $\vec{u}$. The aperture field is shown to display long range correlations perpendicular to $\vec{u}$: for flow in ...
Auradou, Harold, Boschan, Alejandro, Chertcoff, Ricardo, Gabbanelli, Susana, Hulin, Jean-Pierre, Ippolito, Irene   +5 more
core   +2 more sources