Abstract:
Research shows
that dynamic response is the origin of the phenomena. While a
friction pair is in motion, the dynamic response force
corresponding to the rate of elastoplastic deformation of
contact makes the surfaces of the pair dynamically harden and
separate a certain level from the equilibrium position.
Consequently, the real area of contact decreases with an
increase in sliding speed. While the friction pair comes to
rest, the remaining process of dynamic response would not
disappear instantaneously but will gradually return to normal
position, and as a result the contact area is increased during
the rest period. These processes appear as F-ν descent and F-t
ascent characters. Because of the dynamic response, the real
contact area is seriously decreased, consequently there occurs
serious stress concentration and intensive wear. Thus, the
dynamic response may be used to evaluate matching character of a
friction pair. It is prospective that to study dynamic response
of solid is of great significance on wear research. Conceptual
and experimental explanation on dynamic response was introduced
in 1981. But the concept is too abstract to understand. In order
to imaginarily recognize the phenomenon, by using the
universality of natural law, the dynamic response in dry
friction pair is simulated by thermodynamics. Thus, the concept
of dynamic response is vividly depicted.
Key words:
Mechanism Stick slip Dynamic
response Simulation Thermodynamics
Manuscript received on July
17, 1993
|