Zobrazeno 1 - 10
of 71
pro vyhledávání: '"Andres Soom"'
Autor:
Gary F. Dargush, Andres Soom
Publikováno v:
Tribology International. 100:360-370
Computational mechanics codes include contact or over-closure models to account for contact stiffness, which can be related to surface roughness and nominal pressure from Greenwood and Williamson. We present results of wear simulation studies with ad
Autor:
Andres Soom, Catalin Serpe
Publikováno v:
Tribology International. 100:171-177
Two features of contact between rough surfaces are localized interactions between asperities and the presence of air in the gap. This gives rise to a contact compliance, a static and local property and, when contacts vibrate, mechanical damping due t
Publikováno v:
Journal of Tribology. 126:217-224
Many devices such as seals, clutches, and brakes involve the thermomechanical contact of rough surfaces in sliding motion. The asperity level interactions which are highly localized depend upon the thermal distortion of the interface and possibly the
Autor:
J.W. Porter, Andreas A. Polycarpou, Victor Demjanenko, V. Swarnakar, Andres Soom, R.A. Valtin, M. Soumekh, D.M. Benenson, R.S. Acharya
Publikováno v:
IEEE Transactions on Power Delivery. 11:848-857
Noninvasive vibration diagnostic techniques are implemented to assess the mechanical condition of power circuit breakers. A diagnostic system, the prototype commercial portable diagnostic system (PCPDS) has been developed Hardware of the PCPDS includ
Autor:
Andreas A. Polycarpou, Andres Soom
Publikováno v:
Journal of Tribology. 118:183-189
A two-component, two-dimensional friction model for a lubricated line contact, operating in boundary and mixed lubrication regimes, is developed. The friction is explicitly decomposed into the solid and the fluid shear components. The solid component
Autor:
Andres Soom, Andreas A. Polycarpou
Publikováno v:
Journal of Vibration and Acoustics. 117:294-299
Sets of unsteady friction experiments are presented. The data allow an interpretation to be made of the principal physical phenomena that occur during the transitions that take place during impending slip or stick in interrupted sliding. The test geo
Autor:
Andreas A. Polycarpou, Andres Soom
Publikováno v:
Journal of Tribology. 117:255-260
The instantaneous normal motion between bodies in a sliding contact is an important variable in determining dynamic friction under unsteady sliding conditions. In order to model friction under dynamic conditions, it is therefore necessary to combine
Autor:
Andreas A. Polycarpou, Andres Soom
Publikováno v:
Journal of Tribology. 117:261-266
The normal dynamic model of the sliding system developed in Part I of this paper is combined with a friction model, obtained separately from the same apparatus, to provide estimates of the friction under dynamic loading conditions. The two-dimensiona
Autor:
Andreas A. Polycarpou, Andres Soom
Publikováno v:
Journal of Tribology. 117:178-184
Two-dimensional dynamic friction models at a lubricated line contact, operating in boundary and mixed lubrication regimes, are developed. The friction coefficient is shown to be a function of the sliding velocity and the instantaneous separation of t
Autor:
Daniel P. Hess, Andres Soom
Publikováno v:
Journal of Tribology. 115:96-101
Changes in friction due to angular motions at rough planar contacts are investigated using a compliant contact model that isolates an angular degree-of-freedom. Expressions are developed that relate the real area of contact, the contact forces and th