Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 8 of 8 for “"Stick-slip motion"”.
-
Transfer lubrication techniques in a stick slip situation.
… lubrication technique as a means of eliminating stick slip vibratory motion. The experimental apparatus consisted of a replaceable disc fastened to a rotor supported in air journal bearings. The disc was driven rotationally via an elastic member and radially loaded by two diametrically opposed …
-
A probabilisitc approach to the frequency domain analysis of drill-string lateral vibrations
… factors such as mass imbalance, whirling, or stick-slip motion of the bit. The present study focuses on one aspect which has not been studied in detail by the drilling community, namely the consideration of random loads on the BHA studied by a frequency domain approach. A comprehensive …
-
Investigating the angle or response and maximum stability of a cohesive granular pile
… In particular, I examine the transition from stick-slip motion to continuous motion as well as the effect of viscosity on the angle of repose of the granular pile. I offer a qualitative explanation for my observations of these phenomena.
-
Stick-slip behavior of liquid droplets on pillar-arrayed PDMS surfaces
… moves on a rough surface, it usually undergoes a stick-slip motion. However, this phenomenon lacks a proper explanation with micro-level details and analysis. . In this study, a series of experiments were conducted to monitor the contact line (CL) evolution and resistant force over time when …
-
Development of Electromagnetic Friction Dampers for Improving Seismic Performance of Civil Structures
… a highly nonlinear hysteretic behavior caused by stick-slip motion at low velocities, a phenomenon that is inherent in friction and increases the acceleration response of the structure under control unfavorably, in spite of the fact that the displacement is generally reduced because of the energy …
-
Complex retreat behavior in experimental barrier island response to base level rise
… overall long-term retreat occurred through a “stick-slip” motion comprising stationary intervals alternating with backward steps. The source of this complex behavior is a cycling between two morphologies: one where an island has a developed ridge and another where no ridge is present. Sea level …
-
Studies of Seismic Sources in Antarctica Using an Extensive Deployment of Broadband Seismographs
… along Vanderford glacier and tidally modulated stick-slip motion of the Whillans Ice Stream. I further examine two types of events found through my review of the seismicity of Antarctica. I show that a cluster of events located in West Antarctica near the Marie Byrd Land linear volcanic chain …
-
Frictional oscillations in elastomeric sliding
… to determine the conditions under which noise or stick-slip occurs. Elastomers tested include natural rubber with 0,5,10, 20, and 50 phr (parts per hundred rubber) carbon black, butyl, polydimethyl siloxane, and fluorocarbon. The hard counterfaces include chromium oxide, aluminum, epoxy paint, and …