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Keywords: friction
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Journal Articles
Article Type: Technical Briefs
J. Appl. Mech. December 2021, 88(12): 124501.
Paper No: JAM-21-1239
Published Online: August 24, 2021
..., anomalies in the Love wave dispersion have been reported in the literature. When slip occurs at the crust-mantle interface, another kind of an interfacial wave, called the slip wave can exist. It is shown that the dispersion relation of the slip wave, with a slip weakening friction law, appears...
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...
Journal Articles
Article Type: Research-Article
J. Appl. Mech. June 2016, 83(6): 061003.
Paper No: JAM-15-1441
Published Online: March 28, 2016
... for 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 disk...
Journal Articles
Article Type: Research-Article
J. Appl. Mech. July 2014, 81(7): 071004.
Paper No: JAM-13-1517
Published Online: March 12, 2014
.... The incorporation of microcapsules dramatically decreased the friction and wear of the composites from those of the epoxy. The increased microcapsule content or the incorporation of larger microcapsules decreased the friction and wear of the epoxy composites due to the larger amount of released wax lubricant via...
Journal Articles
Article Type: Research-Article
J. Appl. Mech. July 2013, 80(4): 041032.
Paper No: JAM-12-1407
Published Online: May 31, 2013
... Adhesion plays a significant role in the friction and wear in the case where the contact surfaces are continuous and smooth such that roughness-based factors are negligible. Therefore, imposing an external load to overcome the friction is, in essence, a failure process of adhesive junctions. In this work...
Journal Articles
Article Type: Research-Article
J. Appl. Mech. July 2013, 80(4): 040906.
Paper No: JAM-13-1022
Published Online: May 31, 2013
... the tunability of such an oscillator in terms of frequency and friction by its varying geometric parameters. Exploration of the damping mechanism by combining the autocorrelation function theory and the direct atomistic simulations reveals that the friction force is proportional to the velocity of oscillatory...
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
... to 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
... 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 in the maximum...
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
... 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 associated...
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 shooting...
Journal Articles
Article Type: Research Papers
J. Appl. Mech. March 2011, 78(2): 021017.
Published Online: December 20, 2010
..., the governing differential equation reduces to an algebraic equation with an explicit analytical solution. Furthermore, the bulk viscosity of the damp powder does not enter this solution. Consequently, it is suggested that the rotating impervious cone is a useful geometry to measure the interfacial friction law...
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
.... The 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...
Journal Articles
Article Type: Research Papers
J. Appl. Mech. November 2010, 77(6): 061010.
Published Online: August 20, 2010
... with the 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 friction...
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...
Journal Articles
Article Type: Technical Briefs
J. Appl. Mech. March 2010, 77(2): 024501.
Published Online: December 8, 2009
... , 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 Strands ,” J. Eng. Mech. 0733-9399 , 126 , pp. 641 – 646 . 10.1061/(ASCE)0733-9399(2000)126:6(641...