For the PVDC pellet study at Rensselaer Polytechnic Institute (3), the coefficients of dynamic friction
were measured using a device called a screw simulator.
It will be referred to in this paper as the coefficient of dynamic friction
or simply coefficient of friction.
A simple friction law with static and dynamic friction
levels can produce tremor-like events below the seismogenic layer of strike-slip faulting, if the stress drop is close to zero.
Beyond temperature effects or bulk polymer properties, it could be hypothesized that the rate of increase of mar damage by velocity may be related to dynamic friction
or film formation characteristics such as film morphology or surface roughness.
where A and B are constants specific to the dynamic friction
measurement device being used.
All me results show that static motion is greater than dynamic friction
, suggesting that the sheel materials will continue to slide once the initial static frictional force is overcome.
Material Coated MD CD Tensile Strength (MPa) 36 [+ or -] 3 19 [+ or -] 1 Material Printed (black ink) MD CD Tensile Strength (MPa) 36 [+ or -] 2 19 [+ or -] 1 Table 2 Results of friction test on coated and printed paperboard Material Coating Printed (black ink) Dynamic friction
It is also important that, although frictions are passive, but dynamic friction
must be compensated for in the tracking problem, and static friction must be compensated for in set-point regulation.
The paper presents an accurate methodology to evaluate dynamic friction
forces of contacting teeth as a function of shared dynamic normal load and instantaneous friction coefficient of contacting teeth under dynamic conditions.
A very brief period, dt, during which Coulomb friction changes from a static to dynamic friction
condition, static friction prevails.
There are small differences in static-start-up-and dynamic friction
, making motion control reliable and energy efficient.
1b) represents the summing effects of static and dynamic friction
forces of the system, where