Results 11 to 20 of about 14,096,944 (291)

Adhesive and molecular friction in tribological conjunctions [PDF]

open access: yes, 2012
This thesis investigates the underlying causes of friction and ine ciency within an internal combustion engine, focusing on the ring-liner conjunction in the vicinity of the power-stroke top dead centre reversal.
Chong, William Woei Fong
core   +7 more sources

Multi-physics simulation of friction stir welding process [PDF]

open access: yes, 2009
Purpose: The Friction Stir Welding (FSW) process comprises of several highly coupled (and non-linear) physical phenomena: large plastic deformation, material flow transportation, mechanical stirring of the tool, tool-workpiece surface interaction ...
Li, Hongjun, Mackenzie, D., Hamilton, R.
core   +4 more sources

Multiphysics models for friction stir welding simulation [PDF]

open access: yes, 2013
Purpose: The Friction Stir Welding (FSW) process comprises of several highly coupled (and non-linear) physical phenomena: large plastic deformation, material flow transportation, mechanical stirring of the tool, tool-workpiece surface interaction ...
Li, Hongjun   +2 more
core   +3 more sources

Friction Modelling in Boundary Lubrication Considering the Effect of MoDTC and ZDDP in Engine Oils

open access: yesTribology Online, 2011
A predictive friction model has been developed in boundary lubrication conditions to understand the sensitivity of the model to molybdenum dithiocarbamate (MoDTC), a friction modifying additive and zinc dialkyldithiophosphate (ZDDP), an antiwear additive
Rupesh Roshan   +6 more
doaj   +1 more source

Effects of a straight oil on friction at the tool-workmaterial interface in machining [PDF]

open access: yes, 2010
Authors would like to express their gratitude to the TOTAL Company for the furniture of the lubricant.The quantification of friction coefficient along the tool-workmaterial interface in machining remains an issue in tribology. This paper aims identifying
RECH, Joël   +7 more
core   +1 more source

A Review of Key Technologies for Friction Nonlinearity in an Electro-Hydraulic Servo System

open access: yesMachines, 2022
In a high-precision servo system, the nonlinear friction link is the key factor affecting the system performance. Reasonable solving of the friction link in servo systems has become a focus of current research.
Bingwei Gao   +4 more
doaj   +1 more source

A prediction model of flat belt slippage considering rigid-slip during power transmission

open access: yesNihon Kikai Gakkai ronbunshu, 2023
The purpose of this study is to propose an effective model for predicting the slip ratio of a belt transmission mechanism during power transmission, considering the different tensile stiffness of the drive belt.
Kiyotaka OBUNAI, Kazuya OKUBO, Ato FUKUO
doaj   +1 more source

A liquid-crystal model for friction [PDF]

open access: yesProceedings of the National Academy of Sciences, 2008
Rate-and-state friction is an empirical approach to the behavior of a frictional surface. We use a nematic liquid crystal in a channel between two parallel planes to model frictional sliding. Nematic liquid crystals model a wide variety of physical phenomena in systems that rapidly switch between states; they are well studied and ...
Cheng, C   +3 more
openaire   +2 more sources

Mathematical Model of Linear Motor Stage with Non-Linear Friction Characteristics

open access: yesJournal of Advanced Mechanical Design, Systems, and Manufacturing, 2008
This paper proposes a mathematical model of a feed drive system consisting of a cylindrical linear motor and linear ball guides. The friction model consists of two components; a model for the relationships between displacement and friction force under ...
Satoshi KANEKO   +2 more
doaj   +1 more source

Avalanche precursors in a frictional model [PDF]

open access: yesPhysical Review E, 2017
We present a one-dimensional numerical model based on elastically coupled sliders on a frictional incline of variable tilt. This very simple approach makes possible to study the precursors to the avalanche and to provide a rationalization of different features that have been observed in experiments.
Amon, Axelle   +2 more
openaire   +4 more sources

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