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Keywords: friction
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Journal Articles
Article Type: Research Papers
J. Appl. Mech. December 2020, 87(12): 121002.
Paper No: JAM-20-1357
Published Online: September 16, 2020
...Matthew Brownell; Arun K. Nair Polytetrafluoroethylene (PTFE) has been studied as a low friction surface coating since its discovery. The high wear-rate of PTFE reduces the usefulness of the polymer for mechanical purposes; however, combining PTFE with polydopamine (PDA) has been shown to greatly...
Journal Articles
Article Type: Research-Article
J. Appl. Mech. May 2019, 86(5): 054501.
Paper No: JAM-18-1696
Published Online: March 5, 2019
...Ziyou Wu; Dan Zhao; Shai Revzen Conventional wisdom would have it that moving mechanical systems that dissipate energy by Coulomb friction have no relationship between force and average speed. One could argue that the work done by friction is constant per unit of distance travelled, and if...
Journal Articles
Article Type: Research-Article
J. Appl. Mech. June 2016, 83(6): 061003.
Paper No: JAM-15-1441
Published Online: March 28, 2016
... that is due to the lack of reasonable understanding for the influence of combined sliding and rolling friction on the disk dynamics. To unveil how the two types of friction affect the disk motion, this paper presents a combined investigation of experiments and simulations on the dynamics of a spinning...
Journal Articles
Article Type: Research-Article
J. Appl. Mech. July 2014, 81(7): 071004.
Paper No: JAM-13-1517
Published Online: March 12, 2014
... 02 2014 26 02 2014 1 Corresponding author. References [1] Kuo , Q. B. , Lau , K. T. , Zheng , B. F. , Rong , M. Z. , and Zhang , M. Q. , 2009 , “ Imparting Ultra-Low Friction and Wear Rate to Epoxy by the Incorporation of Microencapsulated Lubricant...
Journal Articles
Article Type: Research-Article
J. Appl. Mech. July 2013, 80(4): 041032.
Paper No: JAM-12-1407
Published Online: May 31, 2013
.... , 1939 , “ The Nature of Sliding and the Analysis of Friction ,” Proc. R. Soc. London, Ser. A , 169 , pp. 371 – 391 . 10.1098/rspa.1939.0004 [3] McFarlane , J. S. , and Tabor , D. , 1950 , “ Relation Between Friction and Adhesion ,” Proc. R. Soc. London, Ser. A , 202 , pp. 244 – 253...
Journal Articles
Article Type: Research-Article
J. Appl. Mech. July 2013, 80(4): 040906.
Paper No: JAM-13-1022
Published Online: May 31, 2013
...-Based NEMS ,” Phys. E , 44 ( 6 ), pp. 949 – 954 . 10.1016/j.physe.2011.07.018 [6] Cumings , J. , and Zettl , A. , 2000 , “ Low-Friction Nanoscale Linear Bearing Realized From Multiwall Carbon Nanotubes ,” Science , 289 ( 5479 ), pp. 602 – 604 . 10.1126/science.289.5479.602 [7...
Journal Articles
Article Type: Research Papers
J. Appl. Mech. November 2011, 78(6): 061008.
Published Online: August 24, 2011
... shells of revolution which are wound along the semigeodesic fiber paths counting on the preset friction used during the winding process. Sample results are obtained for truncated conical and spherical shells of revolution and the effect of preset friction on the vibration characteristics of filament...
Journal Articles
Article Type: Research Papers
J. Appl. Mech. November 2011, 78(6): 061002.
Published Online: August 22, 2011
... determine fully parameters for relevant mathematical models. On the other hand, fine-mesh finite element (FMFE) modeling facilitates innumerable numerical experiments at modest cost. Detailed FMFE analysis of built-up structures with frictional interfaces reproduces trends among problem parameters found...
Journal Articles
Article Type: Research Papers
J. Appl. Mech. September 2011, 78(5): 051015.
Published Online: August 5, 2011
... load in the interior ballistic cycle. According to simulations and analysis, the projectile positioning structure is feasible and the strength of the projectile can meet the strength requirement for launch conditions. For different maximum static friction coefficients, simulations show that an increase...
Journal Articles
Article Type: Research Papers
J. Appl. Mech. July 2011, 78(4): 041011.
Published Online: April 13, 2011
...R. H. Plaut; D. A. Dillard; A. D. Borum Equilibrium states are investigated for a heavy flexible strip that is fixed at one end and rests on an internal frictional support. Large vertical deflections are admitted. In the analytical portion of the study, the strip is modeled as an inextensible...
Journal Articles
Article Type: Research Papers
J. Appl. Mech. July 2011, 78(4): 041008.
Published Online: April 13, 2011
... significantly affected by the channel surface properties. Based on the experimental study it is concluded that a unique shear yield stress cannot be defined for a given MR fluid, since its pressure drop depends on the surface topology of the device. Therefore, a relation for nondimensional friction factor...
Journal Articles
Article Type: Research Papers
J. Appl. Mech. May 2011, 78(3): 031011.
Published Online: February 15, 2011
.... The critical overhang length depends on (a) the length, weight per unit length, and bending stiffness of the strip, (b) the coefficients of friction (CoFs) between the strip and both the surface and its edge, and (c) the inclination of the surface. The strip is modeled as an inextensible elastica. A...
Journal Articles
Article Type: Research Papers
J. Appl. Mech. March 2011, 78(2): 021017.
Published Online: December 20, 2010
... friction law for the flow of a damp powder past an impervious wall. 25 06 2010 10 09 2010 17 09 2010 20 12 2010 20 12 2010 Oliver , D. R. , and Ward , S. G...
Journal Articles
Article Type: Research Papers
J. Appl. Mech. March 2011, 78(2): 021011.
Published Online: November 9, 2010
...M. Eriten; A. A. Polycarpou; L. A. Bergman The effect of roughness on the frictional energy dissipation in fretting contact of nominally flat rough surfaces is studied. The contact is modeled as the statistical sum of asperity tip junctions. A mathematical analysis with a probability distribution...
Journal Articles
Article Type: Technical Briefs
J. Appl. Mech. March 2011, 78(2): 024501.
Published Online: November 8, 2010
... proposed formula verifies well the results given by Rayleigh, Blasius, and Williams–Rhyne for all time, thus for all Strouhal number values, which is the characteristic of the studied problem. As the main results, the local skin friction depending on a Strouhal number is given in an aim to show an...
Journal Articles
Article Type: Research Papers
J. Appl. Mech. November 2010, 77(6): 061010.
Published Online: August 20, 2010
... friction coefficient. Stable or unstable spiraling and oscillating modes were seen to occur in well defined shaft speed zones. In the main, for the configurations studied, the shaft vibration was found to be unstable for speeds below the first critical speed and stable for speeds above the first critical...
Journal Articles
Article Type: Research Papers
J. Appl. Mech. September 2010, 77(5): 051805.
Published Online: July 1, 2010
.... The parametric study shows that low-strength jets promote development of instabilities, a tendency that is amplified by frictional forces between the materials. The influence of the plate strength is more complex due to the influence of the structural stability on the contact forces. The effect of...
Journal Articles
Article Type: Research Papers
J. Appl. Mech. March 2010, 77(2): 021014.
Published Online: December 14, 2009
... solution. For soft metallic materials, metals at high temperature, rough surfaces, or dry contacts with high friction coefficient, the yield stress within the material could be easily exceeded even at low normal load. This paper presents the effect of a cuboid of uniform plastic strain in a half-space on...
Journal Articles
Article Type: Technical Briefs
J. Appl. Mech. March 2010, 77(2): 024501.
Published Online: December 8, 2009
... , “ A Concise Finite Element Model for Simple Straight Wire Rope Strand ,” Int. J. Mech. Sci. 0020-7403 , 41 , pp. 143 – 161 . 10.1016/S0020-7403(98)00039-3 Labrosse , M. , Nawrocki , A. , and Conway , T. , 2000 , “ Frictional Dissipation in Axially Loaded Simple Straight...
Journal Articles
Article Type: Research Papers
J. Appl. Mech. March 2010, 77(2): 021002.
Published Online: December 8, 2009
... given by the Keller box method. Furthermore, the effects of physical parameters on some important physical quantities, such as the local skin-friction coefficient and the boundary-layer thickness, are investigated in detail. Mathematically, this analytic approach is rather general in principle and can...