Understanding Friction in Cam-Tappet Contacts : An Application-Oriented Time-Dependent Simulation Approach Considering Surface Asperities and Edge Effects

DOI zum Zitieren der Version auf EPub Bayreuth: https://doi.org/10.15495/EPub_UBT_00006555
URN to cite this document: urn:nbn:de:bvb:703-epub-6555-4

Title data

Orgeldinger, Christian ; Tremmel, Stephan:
Understanding Friction in Cam-Tappet Contacts : An Application-Oriented Time-Dependent Simulation Approach Considering Surface Asperities and Edge Effects.
In: Lubricants. Vol. 9 (26 October 2021) Issue 11 . - No. 106.
ISSN 2075-4442
DOI der Verlagsversion: https://doi.org/10.3390/lubricants9110106

	Format: PDF Name: lubricants-09-00106.pdf Version: Published Version Available under License Creative Commons BY 4.0: Attribution
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Project information

Project title:	Project's official title Project's id Priority Program “Resource-efficient construction elements” SPP 1551 Open Access Publizieren No information
Project financing:	Deutsche Forschungsgemeinschaft

Abstract

With the increasing challenges of climate change and scarce resources, the development of sustainable and energy-efficient technical systems is becoming increasingly important. In many applications, the friction losses occurring in contacts have a decisive influence on the overall efficiency. At this point, tribological contact optimization can make an important contribution to increasing the efficiency of technical systems. However, improvements are often associated with a considerable experimental effort. To reduce the development time, additional simulation models can be applied to predict the tribological behavior. This requires the closest possible approximation of the real contact within a numerical model. This paper presents a simulation approach for the time-dependent simulation of a cam–tappet contact. The simulation uses realistic operating conditions as they arise in the valve train of internal combustion engines. The influence of edge effects on the friction behavior is considered by a scaled calculation area and the influence of the surface roughness is investigated using stochastic asperity models. It is shown that the tribological behavior within the contact strongly depends on the surface properties and the load spectrum used. In addition, edge effects on the sides of the contact area have a clear influence on the pressure and film thickness distribution.

Further data

Item Type:	Article in a journal
Keywords:	tribology; EHL simulation; elastohydrodynamic lubrication; cam/tappet contact; finite element method; friction mechanisms; system efficiency
DDC Subjects:	600 Technology, medicine, applied sciences > 620 Engineering
Institutions of the University:	Faculties > Faculty of Engineering Science > Former Professors > Chair Engineering Design and CAD - Univ.-Prof. Dr.-Ing. Frank Rieg Faculties > Faculty of Engineering Science > Chair Engineering Design and CAD > Chair Engineering Design and CAD - Univ.-Prof. Dr.-Ing Stephan Tremmel Faculties Faculties > Faculty of Engineering Science Faculties > Faculty of Engineering Science > Former Professors Faculties > Faculty of Engineering Science > Chair Engineering Design and CAD
Language:	English
Originates at UBT:	Yes
URN:	urn:nbn:de:bvb:703-epub-6555-4
Date Deposited:	26 Jul 2022 09:08
Last Modified:	26 Jul 2022 09:08
URI:	https://epub.uni-bayreuth.de/id/eprint/6555

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