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Friction-Induced Vibrations : Excitation Mechanisms and Counter Measures

100%

Popp K. , Lindner M. , Rudolph M.

Machine Dynamics Problems

2004

tom Vol. 28, No. 2

37-40

Friction is an all-day-phenomenon and everybody is familiar with it. From an engineering point of view two different phenomena can be distinguished. First, the resistance against the start of a relative motion of bodies which is caused by the contact between these bodies. Secondly, the resistance against an existing relative motion of two contacting bodies. In the first case, the phenomenon is called static friction. It is of great use in technical applications as it enables for example fixing of parts by screws or driving of land vehicles by wheels. In the second case, the effort to sustain a sliding motion is called kinetic friction. Usually, this effect is unwanted in engineering because it is responsible for the transformation of kinetic energy into heat and, thus, additional energy consumption, as well as for the wear of parts by relative motion.

Protozoa in the breast muscle of raptors in Germany

100%

Krone O. , Rudolph M. , Jakob W.

nr 1

Synaptic integration in cortical neurons under natural and artificial high-conductance states

75%

Piwkowska Z. , Badoual M. , Rudolph M. , Destexhe A. , McCormick D. A. , Bal T.

nr 3