See FISITA Library items from Chengyuan Fang

EB2021-STP-007

Paper

Abstract

Prof. Dr.-Ing. Georg-Peter Ostermeyer, TU Braunschweig, GERMANY

Mr. Chengyuan Fang, TU Braunschweig, GERMANY

Mr. Felix Rickhoff, TU Braunschweig, GERMANY


The frictional behavior of a tribological contact is the result of complex interactions between two bodies.

In the case of tribological high-load contacts, such as those found in brakes, wear and the associated wear particles play a particularly important role. In the last two decades, a number of papers have been written on this subject, which explain the highly complex dynamics of the friction coefficient, among other things, with the self-organization structures of the wear material in the tribocontact.

Here, particle concentrations, so-called patches, form, which act like additional contact areas in the boundary layer. Since they change dynamically, the friction performance shows similar dynamic structures.

But the ejection of wear particles is also the current focus of research. The emissions also exhibit dynamic signatures.

This work wants to present the further developed measurement technique as well as first approaches to describe the wear particle transport in the boundary layer by experiment and simulation.

EuroBrake 2021

FOF

WATCH VIDEO
DOWNLOAD PDF
DOWNLOAD SLIDES

Downloads

EB2021-STP-006

Paper

Abstract

Prof. Dr.-Ing. Georg-Peter Ostermeyer, TU Braunschweig, GERMANY

Mr. Chengyuan Fang, Institute of Dynamics and Vibration of TU Braunschweig, GERMANY

Mr. Guido Lehne-Wandrey, Institute of Dynamics and Vibration of TU Braunschweig, GERMANY

Mr. Malte Sandgaard, Institute of Dynamics and Vibration of TU Braunschweig, GERMANY

Mr. Alexander Vogel, Institute of Dynamics and Vibration of TU Braunschweig, GERMANY

Mr. Jacek Kijanski, Institute of Dynamics and Vibration of TU Braunschweig, GERMANY

Mr. Thomas Hillner, wenglor sensoric GmbH, GERMANY

Mr. Fabian Repetz, wenglor sensoric GmbH, GERMANY


Friction tests under controlled conditions are crucial for the understanding of the boundary layer dynamics in technical brake systems. The dynamics of the friction interface characterize the braking performance. In order to evaluate and monitor the dynamics of the friction interface, detailed insights into the friction behavior is obtained by high precision tribotesters under laboratory conditions. Especially in the low sliding speed range, specialized machines such as the Variable Velocity Tribotester (VVT) make it possible to mimic real world phenomena under controlled conditions, e.g. creep groan or COF in low temperatures.

This paper presents the wenglor sensoric 3D sensor ShapeDrive MLAS201 for measuring the pad surface between friction applications at VVT. With this device, quasi in-situ measurements with high speed and precision of the pad’s surface are attained. The 3D sensor consists of a light engine which projects several patterns onto the pad surface and a high resolution camera which can record these patterns again. The topography and intensity information of the pad surface would be stored in a point cloud file with high precision of 12 megapixels. Such information can be used to analyze the surface properties such as roughness and height. With further algorithms it is also possible to observe the change of the entire topography and in further way to determine the wear volume and analyze the contact situations.

EuroBrake 2021

NVHF

WATCH VIDEO
DOWNLOAD PDF
DOWNLOAD SLIDES

Downloads

Error message goes here.

arrow&v

Chengyuan Fang is a research engineer in the tribology working group under the leadership of Prof. Dr. Ostermeyer at the Institute of Dynamics and Vibrations in Braunschweig, Germany.


He had a bachelor´s degree in mechanical engineering from China University of Petroleum. After that, he obtained a master´s degree at the Technical University of Braunschweig, where he is currently working towards a PhD. His current research topics are the tribochemical processes induced by sliding friction.

Germany

Research Engineer

Company Text

Job title

Company Name

Company Text

Mr. Chengyuan Fang

FISITA Committees & Groups

Executive Board

News on FISITA Spotlight

16 July 2021

Spotlight title

Stay up to date with FISITA Spotlight

More Blogs Item Title

Excerpt from the blog goes here - this will give the reader a brief snapshot of what the post is about...

16 July 2021

READ NOW