This paper presents a new non-smooth model for three dimensional contact problems with Coulomb friction. The problem is formulated exactly as a system of non-smooth equations without employing any external variables or approximation. As compared with the existing models, the present model does not ...
smoothjoint Model name sj_kn kn Normal stiffness per unit area [force/volume] FLT [0.0,+∞) 0.0 YES YES sj_ks ks Shear stiffness per unit area [force/volume] FLT [0.0,+∞) 0.0 YES YES sj_fric μ Friction coefficient [-] FLT [0.0,+∞) 0.0 YES YES sj_da ψ Dilation angle [deg...
Feeny, B.: A non-smooth Coulomb friction oscillator. Physica D 59, 25–38 (1992) ArticleMATHMathSciNetGoogle Scholar Filippov, A.F.: Differential equations with discontinuous right-hand side. American Mathematical Society Translations 42(2), 199–231 (1978) ...
For the simple Coulomb model (Rabinowicz, 1965), the friction coefficient takes two distinct values, for rate independent sliding, μd, and for the threshold for slipping, μs, such that τ≤μsσn, with μs≤μd. This model is widely used primarily due to its simplicity, however it ...
Equations for velocity as a function of position are derived in terms of two dimensionless, spatially averaged resistance factors. A procedure is outlined to estimate the resistance factors and assess the relative effects of Coulomb friction and speed-dependent resistance on avalanche motion....
Experimental evidences show that friction during rotor/stator rubbing may not always obey the Coulomb friction law, which is predominantly adopted in the studies of these kinds. This work is devoted to unveiling the effects of viscous damping in the friction model on forward and backward full ...
The performance of the method is shown for model bifurcations in discretised contact problems with Coulomb friction. First, different parameter settings in its input are tested so that the optimum one can be proposed. Then, the method is used to investigate the behaviour of the bifurcations for...
Motyčková, KristinaKučera, RadekFaculty of Electrical Engineering and Computer Scienceadvances in electrical & electronic engineeringMotyˇckova´, K. and Kuˇcera, R.: Semi-smooth Newton method for solving 2D contact problems with Tresca and Coulomb friction. Advances Electr. Electron. Engrg...
In this work, the unilateral constraints are described by a set-valued force law of the type of Signorini's condition, while the frictional contacts are characterized by a set-valued force law of the type of Coulomb's law for dry friction. The resulting contact-friction problem is formulated...
beyond these drawbacks of linear vibration isolation systems, whereas linear systems are unable to resolve the conflict between vibration isolation frequency and static displacement. The mass of the (SD) moves on a sliding belt with Coulomb friction between it and the belt. The SD, or Smooth and...