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Keywords: friction
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Journal Articles
Article Type: Research-Article
J. Mech. Des. April 2014, 136(4): 041006.
Paper No: MD-13-1116
Published Online: February 26, 2014
...Changzhao Liu; Datong Qin; Yinghua Liao Fig. 17 Wigner–Ville distributions of meshing force ( a )–( c ) show results for model with variable friction coefficient, with constant friction of 0.02, and without friction, respectively, when profile error excitations are included; ( d )–( f...
Journal Articles
Article Type: Research Papers
J. Mech. Des. January 2012, 134(1): 011007.
Published Online: January 4, 2012
..., non-smooth paths. Such paths can be traced by rigid-body or partially compliant mechanisms as well but the complexity, bulkiness and the presence of hinges is a disadvantage in terms of increased friction, backlash, need for lubrication, noise, and vibrations. In designing CCMs, both curved frame...
Journal Articles
Article Type: Research Papers
J. Mech. Des. December 2011, 133(12): 121004.
Published Online: December 9, 2011
... control. The algebraic model has been verified by comparing computed results against those simulated using ANSYS FEA workbench and published approximate solutions. Additionally, the model has been validated by comparing the friction coefficients of three different snap-fit designs (with same materials...
Journal Articles
Article Type: Research Papers
J. Mech. Des. November 2011, 133(11): 111001.
Published Online: November 1, 2011
... of out-of-plane) Length of belt L  = 730 mm Width of belt W  = 160 mm Thickness of belt t  = 0.1 mm Young’s modulus of belt E  = 2.7 GPa Diameter of pulleys D  = 33.6 mm Out-of-plane misalignment angle α = 0.066 deg Coefficient of friction between belt and pulleys μ...
Topics: Belts, Pulleys
Journal Articles
Article Type: Technical Briefs
J. Mech. Des. August 2011, 133(8): 084501.
Published Online: August 10, 2011
... and discusses an approach for 3D dynamic contact and impact analysis of spiral bevel gear drives. Dynamic models considering friction, gear clearance, and time-varying stiffness were established. Finite element software was utilized to analyze the dynamic responses of gear transmission, surface contact stress...
Journal Articles
Article Type: Research Papers
J. Mech. Des. May 2011, 133(5): 051006.
Published Online: June 6, 2011
...Dario Croccolo; Nicolò Vincenzi Interference-fitted and adhesively bonded joints are hybrid fastening systems that involve a hub (cylindrical or asymmetric) and a shaft (solid or hollow) locked together by both a frictional force (based on the radial pressure and the Coulomb friction law...
Journal Articles
Article Type: Research Papers
J. Mech. Des. October 2009, 131(10): 101008.
Published Online: September 16, 2009
...P. Velex; F. Ville An original displacement-based formulation of tooth friction power losses in spur and helical gears is established, which can account for the influence of tooth profile modifications. Several analytical formulas are derived enabling friction losses to be easily estimated...
Journal Articles
Article Type: Technical Briefs
J. Mech. Des. June 2008, 130(6): 064501.
Published Online: April 16, 2008
...Joan Savall; Javier Martín; Alejo Avello Cable transmissions offer several advantages such as high stiffness to weight ratio, high strength, low friction, and absence of backlash, which makes them appropriate for demanding mechanical applications. However, while extensively used as rotational...
Topics: Cables
Journal Articles
Article Type: Technical Briefs
J. Mech. Des. February 2008, 130(2): 024501.
Published Online: December 27, 2007
...Sayed A. Nassar; Xianjie Yang In this paper, the evolution equations of the bearing and thread friction coefficients are proposed based on mechanical behavior of the bolted joint assembly. The study shows excellent correlation between the proposed model and the experimental results...
Journal Articles
Article Type: Technical Briefs
J. Mech. Des. September 2007, 129(9): 986–990.
Published Online: August 11, 2006
...Wenming Shen; Weileun Fang This paper presents a simplified friction clutch design, which consists of the dual Belleville spring and the friction plates. This design exploits the preset angle on the Belleville spring to increase the friction area during operation; thus, the load on spring...
Journal Articles
Article Type: Research Papers
J. Mech. Des. January 2007, 129(1): 7–16.
Published Online: August 2, 2006
...Chao Chen; Jorge Angeles This paper proposes innovative drives for omnidirectional and quasi-omni-directional wheeled mobile robots. A novel epicyclic cam transmission is developed to transmit motion in the drives, with some advantages over its gear-train counterparts: low friction, high stiffness...
Journal Articles
Article Type: Research Papers
J. Mech. Des. January 2007, 129(1): 58–68.
Published Online: June 14, 2006
...H. Xu; A. Kahraman; N. E. Anderson; D. G. Maddock A computational model is proposed for the prediction of friction-related mechanical efficiency losses of parallel-axis gear pairs. The model incorporates a gear load distribution model, a friction model, and a mechanical efficiency formulation...
Journal Articles
Article Type: Research Papers
J. Mech. Des. March 2007, 129(3): 346–360.
Published Online: February 27, 2006
... controller is designed to track the trajectory and handle the nonlinear effects from bias and friction torque. The unique disk drive is manufactured and experiments are performed to demonstrate effectiveness of the complete design strategy. 18 07 2005 27 02 2006 design engineering disc...
Journal Articles
Article Type: Research Papers
J. Mech. Des. May 2006, 128(3): 618–625.
Published Online: August 18, 2005
...C. Changenet; X. Oviedo-Marlot; P. Velex A model is presented which makes it possible to predict power losses in a six-speed manual gearbox. The following sources of dissipation, i.e., power inputs in the model, are considered: (i) tooth friction; (ii) rolling element bearings; (iii) oil shearing...
Journal Articles
Article Type: Research Papers
J. Mech. Des. January 2006, 128(1): 295–302.
Published Online: June 24, 2005
... are first resolved into strategically defined foot contact force components to decouple them, and then the static equilibrium equations are applied. Using the friction cone equation at each foot contact point, the problem is then transformed into a geometrical one. Using geometric properties of the friction...
Journal Articles
Article Type: Research Papers
J. Mech. Des. May 2006, 128(3): 566–573.
Published Online: June 24, 2005
... an optimal solution for the contact force distribution of multi-limbed robots with three feet in contact with the environment in three-dimensional space is presented. The incremental strategy of opening up the friction cones is aided by using the “force space graph” which indicates where the solution...
Journal Articles
Article Type: Technical Papers
J. Mech. Des. January 2005, 127(1): 103–113.
Published Online: March 2, 2005
...G. Carbone; L. Mangialardi; G. Mantriota This paper is concerned with the shifting behavior of a metal belt CVT. The calculations are performed for the chain belt case by using a one-dimensional model of the belt: the radial thickness of the belt is neglected. The friction forces are modeled...
Journal Articles
Article Type: Research Papers
J. Mech. Des. November 2005, 127(6): 1191–1197.
Published Online: February 27, 2005
... contact area is formed at the nearest loading point on threads and bearing surfaces. This leads to a difference in the curvature radii between the bearing surface of the disk and that of the nut. During the revolution of the disk, two friction torques occur in opposite directions on the bearing surface...
Journal Articles
Article Type: Research Papers
J. Mech. Des. November 2005, 127(6): 1137–1144.
Published Online: January 27, 2005
... of friction coefficients between cylindrical rollers and its grooves and spherical ends. The established numerical procedure simulates the normal force acting on the roller groove with a period of π and the housing thrust force with a period of 2 π ∕ 3 for given values of the joint angle. These results...
Journal Articles
Article Type: Technical Papers
J. Mech. Des. July 2005, 127(4): 631–636.
Published Online: September 9, 2004
... to generate a sufficiently high output torque, some means must be provided to create a normal force between the rolling elements. This normal force, along with the friction coefficient, enables the device to transmit torque from one rolling member to the next. The speed reducer proposed here is designed so...