Results 51 to 60 of about 37,901 (338)

Boundary lubrication with a glassy interface

, 2003
Recently introduced constitutive equations for the rheology of dense, disordered materials are investigated in the context of stick-slip experiments in boundary lubrication.
A. Argon, A. Mehta, A. Ruina, Anaël Lemaître, B. N. J. Persson, F. Bowden, F. Spaepen, G. S. Grest, H. K. Christenson, H. Yoshizawa, H. Yoshizawa, J. H. Dieterich, J. H. Dieterich, J. H. Dieterich, J. N. Israelachvili, J. R. Rice, J. Rice, Jean Carlson, K. Maeda, K. Maeda, L. C. E. Struik, L. F. Cugliandolo, M. L. Falk, M. Schoen, P. A. Thompson, S. Edwards, S. F. Edwards, S. Grannick, S. Takeuchi, T. Becker, V. Arnold   +30 more
core   +1 more source

Ageing of a Microscopic Sliding Gold Contact at Low Temperatures [PDF]

, 2011
Nanometer-scale friction measurements on a Au(111) surface have been performed at temperatures between 30 and 300 K by means of atomic force microscopy.
Bennewitz, R, Feldmann, M, Gosvami, NN, Moseler, M, Peguiron, J, Schirmeisen, A   +5 more
core   +1 more source

Low‐Angle Grain Boundaries and Re‐Segregation in Single‐Crystalline Ni‐Base Superalloys

Advanced Engineering Materials, EarlyView.
This work demonstrates that Re‐segregation at low‐angle grain boundaries (LAGBs) in Ni‐base superalloys is influenced by misorientation angle. Advanced microscopy and atom probe tomography reveal that higher misorientation angles increases Re‐segregation.
Alireza B. Parsa, Aparna Saksena, Alesander Kostka, Pascal Thome, Felicitas Scholz, Alexandre Mussi, Christoph Somsen, Baptiste Gault, Jan Frenzel, Gunther Eggeler   +9 more
wiley   +1 more source

Analysis of stick-slip phenomena using discrete element method (Examination of single-layer model)

Nihon Kikai Gakkai ronbunshu
The phenomenon called “stick-slip” is a type of self-excited vibration. When two objects slide against each other, the stick-slip phenomenon occurs.
Satoshi NARITA, Yoshihiro TAKAHASHI
doaj   +1 more source

Sliding without slipping under Coulomb friction: opening waves and inversion of frictional force

, 2016
An elastic layer slides on a rigid flat governed by Coulomb's friction law. We demonstrate that if the coefficient of friction is high enough, the sliding localizes within stick-slip pulses, which transform into opening waves propagating at intersonic ...
Yastrebov, Vladislav A.
core   +3 more sources

Suppressing nano-scale stick-slip motion by feedback [PDF]

, 2012
When a micro cantilever with a nano-scale tip is manipulated on a substrate with atomic-scale roughness, the periodic lateral frictional force and stochastic fluctuations may induce stick-slip motion of the cantilever tip, which greatly decreases the ...
Brokate M., Chun-Wen Li, Feynman R. P., Jing Zhang, Lei Miao, Li G. Y., Ning Xi, Persson B. N. J., Petersen K., Re-Bing Wu, Tzyh-Jong Tarn, Yue-Chao Wang   +11 more
core   +1 more source

Phase Field Failure Modeling: Brittle‐Ductile Dual‐Phase Microstructures under Compressive Loading

Advanced Engineering Materials, EarlyView.
The approach by Amor and the approach by Miehe and Zhang for asymmetric damage behavior in the phase field method for fracture are compared regarding their fitness for microcrack‐based failure modeling. The comparison is performed for the case of a dual‐phase microstructure with a brittle and a ductile constituent.
Jakob Huber, Jan Torgersen, Ewald Werner
wiley   +1 more source

Analysis of the effects of torsional impact tools on drill string stick–slip vibration

Energy Exploration & Exploitation
Torsional impactor is widely used in deep and ultra-deep wells because it can suppress stick–slip vibration and increase ROP. As the direct factor affecting torsional impactor effect, it's working parameters study is still not sufficient.
Chaoyi She, Jianhua Guo, Jie Wu, Qingsong Qiao, Beiqiao Meng, Yuting Zhang   +5 more
doaj   +1 more source

Affecting the Properties of Copper–Graphene Electroconductive Composite by Severe Plastic Deformation

Advanced Engineering Materials, EarlyView.
Copper‐based composites enhanced with carbon feature convenient mechanical properties and favorable electric conductivity. Processing via deformation and thermomechanical treatments can introduce advantageous microstructures further enhancing their performance. Herein, copper–graphene powder‐based composites are directly consolidated via rotary swaging
Radim Kocich, Lenka Kunčická, Pavel Czernek, Zifan Wang   +3 more
wiley   +1 more source

Dynamical model for the formation of patterned deposits at receding contact lines [PDF]

, 2010
We describe the formation of deposition patterns that are observed in many different experiments where a three-phase contact line of a volatile nanoparticle suspension or polymer solution recedes.
Andrew J. Archer, Lubor Frastia, R. Larson, Uwe Thiele   +3 more
core   +2 more sources