### Actively controlled fibrillar friction surfaces

Actively controlled fibrillar friction surfaces H. Marvi,1,a) Y. Han,1,a) and M. Sitti1,2,b) 1Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA 2Max Planck Institute for Intelligent Systems, Heisenbergstr. 3, Stuttgart 70569, Germany (Received 28 September 2014; accepted 21 January 2015; published online 4 February 2015) Andrei GRIGORIEV Director Dr. Sc., Prof. TribologyThe paper presents data on measurements of friction and adhesion forces of silicon ball and silicon plate covered by DDPO4 (dodecylphosphoric acid ester), ODPO4 (octadecylphosphoric acid ester

### Bobbin Tool FSW - A Moving Geometry Model

Corresponding author:Max-Planck-Str. 1, D-21502 Geesthacht, Germany, [email protected] Abstract:Based on the example of a bob-bin tool Friction Stir Welding process model a technique to model thermal processes with a moving geometry in COMSOL is introduced. The described approach allows to model the transient temperature elds in setups Bubbly drag reduction using a hydrophobic inner and J. M. Burgers Centre for Fluid Dynamics, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands 2Soft matter, Fluidics and Interfaces, MESA+ Research Institute, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands 3Max Planck Institute for Dynamics and Self-Organization, Am Fassberg 17, 37077 Göttingen, Germany Corrosion of friction stir welded magnesium alloy AM50Corrosion of friction stir welded magnesium alloy AM50 Rong-Chang Zenga,*, Jun Chena, Wolfgang Dietzelb, Rudolf Zettlerb, Jorge F. dos Santosb, M. Lucia Nascimentoc, Karl Ulrich Kainerb a School of Material Science and Engineering, Chongqing University of Technology, Xingshenglu Rd. 4, Chongqing 400050, China bGKSS-Forschungszentrum Geesthacht GmbH, Max Planck Strasse 1, 21502

### Development and characterization of a MnCu-based high

It is verified that the mechanical properties are similar to that of A3 steel while the vibration noise across the MnCu alloy plate cut about 5-15dB off during all the experiment frequency range from 20 to 300 Hz when the alloy backing plates are applied under a turbine electric generator. Dynamic Effects on Force Measurements. 2. Lubrication and Jan 23, 2003 · We present the results of investigations of high-speed drainage of a thin film confined between a microscopic colloidal probe and a substrate performed with a new atomic force microscope-related setup. Theoretical calculations are used to formulate the governing equation (force balance) for instantaneous deflection of a cantilever spring, which is due to both concentrated forces acting on a Dynamic analysis of cylinder on top of moving plateApr 15, 2017 · I know the friction force grows linearly until the maximum static friction force, and then immediately falls to the dynamic friction force. Therefore what determines if the system will move is the maximum static friction force between the ground and the plate, which is $$F_{fr} = \mu_s \times (m_{plate} + m_{cylinder}) \times g$$

### Flow Measurement Multiple Choice Questions and Answers

(C) Orifice plate (D) Pitot tube (E) Turbine. Answer :E. Question 2. Bernoullis Equation is a mathematical eion of:(A) The ratio of kinetic to viscous forces in a flow stream (B) Friction loss as fluid moves through a rough pipe (C) Potential and kinetic energies in a flow stream (D) Fluid density and compressibility in a restriction Let Q denote the charge on the plate of a capacitor of The related equations are Q = m c (T 2 T 1 ), 1 = 0 [1 + (T 2 T 1 )] and P V = n R T, where the symbols have their usual meanings. Find the dimensions of Find the dimensions of (A) specific heat capacity ( C ) (B) coefficient of linear expansion ( ) and ( C ) the gas constant ( R ) . Quantum Mechanics TimelinePlanck's constant is so small, however, that even a wavelength of a nanometer is only going to have a momentum of 6.6 X 10-34 J-sec / 10-9 m = 6.6 X 10-25 kg m/s 2. Which is

### The Surprisingly Complicated Physics Of Sliding On Ice

Dec 09, 2016 · How The Planck Satellite Forever Changed Our View Of The Universe. Jul 18, 2018, 10:00am EDT. to exhibit relatively high friction. Ice, though, is a very low-friction surface, even at ESG 8.022 Fall 2006 - MIT OpenCourseWareThe plates, each of which has mass M are constrained to move sideways in the z-direction (with no friction). Both plates are in the y z plane (ie:normals to their surface are in the x direction. The top plate carries charge Q0 and the bottom plate carries charge Q0. The plates have length (in the z direction) l and width (in the