Experimental and simulation study of the dynamic characteristics of friction force under third-body intrusion behaviour

2022 ◽  
Vol 168 ◽  
pp. 108726
Author(s):  
Xiaoyu Yan ◽  
Chenglong Fan ◽  
Wei Wang ◽  
Xiaojun Liu ◽  
Bingsan Chen
Keyword(s):  
Friction Force ◽  
Dynamic Characteristics ◽  
Simulation Study ◽  
Third Body

Using FEM to study the frictional instability induced by third-body particles confined in frictional interface

2020 ◽  
Vol 72 (10) ◽  
pp. 1239-1244
Author(s):  
Xiaoyu Yan ◽  
Wei Wang ◽  
Xiaojun Liu ◽  
Jimin Xu ◽  
Lihong Zhu ◽  
...  
Keyword(s):  
Peer Review ◽  
Friction Force ◽  
Rough Surfaces ◽  
Lower Surface ◽  
Third Body ◽  
Content Type ◽  
Frictional Behavior ◽  
Macro Scale ◽  
Frictional Interface ◽  
Frictional Instability

Purpose A finite element method (FEM) model of the frictional behavior of two rough surfaces with a group of third-body particles confined by the surface asperities is established. By monitoring the stress distribution, friction force and the displacement of the surfaces, how the frictional instability is induced by these particles is studied. This modeling job aims to explore the relation between the meso-scale behavior and the macro-scale frictional behavior of these particles. Design/methodology/approach By using FEM, a 2D model of two frictional rough surfaces with a group of elastic or elasto-plastic particles confined by surface asperities is established. The Mises stress, macro friction force and displacements of elements are monitored during compressing and shearing steps. Findings The macro friction coefficient is more stable under higher pressure and smaller under higher shearing speed. The dilatancy of the interface is caused by the elevation effect of the particles sheared on the peak of the lower surface, particles collision and third body supporting. The combined effect of particles motion and surface–surface contact will induce high-frequency displacements of surface units in restricted direction. Originality/value Previous studies about third-body tribology are mainly concentrated on the frictional behavior with large number of particles distributed homogeneously across the interface, but this paper focuses on the behavior of third-body particles confined by surface asperities. Peer review The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-12-2019-0544/

Dynamic characteristics of nanoindentation in Ni: A molecular dynamics simulation study

2012 ◽  
Vol 21 (11) ◽  
pp. 116201 ◽  
Author(s):  
Muhammad Imran ◽  
Fayyaz Hussain ◽  
Muhammad Rashid ◽  
S. A. Ahmad
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulation ◽  
Dynamic Characteristics ◽  
Simulation Study ◽  
Dynamics Simulation

Parameters Identification for Simplified Yaw Model of Articulated Heavy Vehicle

2013 ◽  
Vol 765-767 ◽  
pp. 387-391 ◽  
Author(s):  
Zhi Gen Nie ◽  
Chang Fu Zong
Keyword(s):  
Genetic Algorithm ◽  
Dynamic Characteristics ◽  
Simulation Study ◽  
Dynamic State ◽  
Steering Wheel ◽  
Actual State ◽  
Heavy Vehicle ◽  
Vehicle Speed ◽  
Heavy Vehicles ◽  
Independent Variables

In order to accurately characterize the lateral dynamic characteristics of articulated heavy vehicle, 3-dof simplified yaw model of articulated heavy vehicles is established and key parameters of models are identified by genetic algorithm. MAPs of key parameters, which the vehicle speed and steering wheel angle are independent variables for, are formed using the key identification parameters. Simulation study of dynamic state is carried out by the MAPs of key identification parameters and 3-dof simplified yaw model. That simulation result compared with Trucksim data indicates that key parameters can be accurately identified and the MAPs of key identification parameters satisfies the need of characterizing the actual state of vehicle.

Static and Dynamic Characteristics of Rolling-Pad Journal Bearings in Super-Laminar Flow Regime

1988 ◽  
Vol 110 (1) ◽  
pp. 73-79 ◽  
Author(s):  
Makoto Mikami ◽  
Mikio Kumagai ◽  
Shuetsu Uno ◽  
Hiromu Hashimoto
Keyword(s):  
Friction Force ◽  
Dynamic Characteristics ◽  
Load Capacity ◽  
Journal Bearings ◽  
Curvature Radius ◽  
Static And Dynamic Characteristics ◽  
Oil Film ◽  
Lubrication Equation ◽  
Viscous Heat ◽  
Before And After

Static and dynamic characteristics of load-on-type rolling-pad journal bearings with six pads have been studied theoretically and experimentally by considering the effects of both turbulence and viscous heat generation in the oil film. By concurrently solving a turbulent lubrication equation and an adiabatic energy equation, pressure and temperature distributions, load capacity, and friction force are obtained. Moreover, the linearlized spring and damping coefficients of oil film are calculated under the assumption of small displacements of the journal center. It is found that the load capacity and the friction force considerably increase due to turbulence, and the effects of heat generated under turbulent conditions are more pronounced than those under laminar conditions. Also clarified are that bearing characteristics are improved by preloading the lower-side two pads located before and after the lowest pad, and that the curvature radius of the pad insignificantly affects the characteristics. The experimental results on static characteristics agree well with the theoretical results.

Vibration Analysis of New Type Pipeline-Cleaning Robot

2010 ◽  
Vol 139-141 ◽  
pp. 2172-2177
Author(s):  
Qing Zhong He ◽  
Wen Chun Zhao ◽  
Jia Wang ◽  
Yan Ling Zhang ◽  
Ming Chao Wang
Keyword(s):  
Experimental Study ◽  
Dynamic Simulation ◽  
Dynamic Characteristics ◽  
Simulation Study ◽  
Vibration Analysis ◽  
Simulation Software ◽  
Control Module ◽  
Cleaning Robot ◽  
New Type ◽  
The Stability

The new type of pipeline-cleaning robot discussed in this paper is developed to clean pipelines within the diameter range 200mm-250mm, which is propelled by using screw locomotion. With the help of CATIA, the modeling & simulation software, the simulation model of the robot and its vibration analysis has been obtained. From the analysis, dynamic characteristics of pipeline robot vary with the output parameters of control module and the structures of robot joints. Stimulated vibration has very little influences on the whole machine. The stability and reliability of the robot have been proven. According to the experimental study of principle prototype and dynamic simulation study of the virtual prototype, dynamic characteristics can be improved by optimizing the structures of robot and the related output parameters of control module, which contributes to the improvement of its motion stability. Therefore, it is believed that the robot has great value in practical use.

scholarly journals Investigation of the dynamic characteristics of suspension parameters on a vehicle experiencing steering drift during braking

2005 ◽  
Vol 219 (12) ◽  
pp. 1429-1441 ◽  
Author(s):  
N Mirza ◽  
K Hussain ◽  
A J Day ◽  
J Klaps
Keyword(s):  
Dynamic Characteristics ◽  
Simulation Study ◽  
Simulation Modelling ◽  
Lateral Acceleration ◽  
Dynamics Analysis ◽  
Suspension Parameters ◽  
Straight Line ◽  
Body Dynamics ◽  
Suspension Geometry ◽  
Multi Body

This paper presents a simulation study into the characteristics of a vehicle experiencing steering drift under straight line braking. Simulation modelling has been performed using a multi-body dynamics analysis based on a model of an actual vehicle. Front and rear suspension parameters have been modelled as rigid links joined with flexible bushes so as to assess their effect on a vehicle while braking. Suspension geometry and alignment settings, which define characteristic responses such as lateral acceleration, yaw velocity, toe, and caster angles of a vehicle in a transient manoeuvre, are primary to a vehicle's directional stability. Any symmetric inconsistencies in these settings will potentially affect a vehicle's performance. The findings from this research have increased the understanding of the causes of steering drift during braking conditions.

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