Editing False brinelling (section)

== Simulation of false brinelling ==
The simulation of false brinelling is possible with the help of the finite element method. For the simulation, the relative displacements (slip) between rolling element and raceway as well as the pressure in the rolling contact are determined. For comparison between simulation and experiments, the friction work density is used, which is the product of friction coefficient, slip and local pressure. The simulation results can be used to determine critical application parameters or to explain the damage mechanisms.<ref>{{Cite journal|last1=Schwack|first1=F.|last2=Prigge|first2=F.|last3=Poll|first3=G.|date=October 2018|title=Finite element simulation and experimental analysis of false brinelling and fretting corrosion|journal=Tribology International|volume=126|pages=352–362|doi=10.1016/j.triboint.2018.05.013|s2cid=139773784 |issn=0301-679X}}</ref>
[[File:Simulation der Reibarbeitsdichte.png|center|thumb|Comparison between simulated frictional work density and wear]]Physical simulation of the false brinelling mechanism has been standardized since the 1980's in the Fafnir Bearing test instrument, where two sets of thrust ball bearings are compressed with a fixed load, and the bearings are oscillated by an excentric arm under standardised conditions.  This culminated in the ASTM D4170 standard.<ref>{{Cite journal |last1=Grebe |first1=Markus |last2=Widmann |first2=Alexander |date=July 2023 |title=Comparison of Different Standard Test Methods for Evaluating Greases for Rolling Bearings under Vibration Load or at Small Oscillation Angles |journal=Lubricants |language=en |volume=11 |issue=7 |pages=311 |doi=10.3390/lubricants11070311 |doi-access=free |issn=2075-4442}}</ref><ref>ASTM D4170, Standard Test Method for Fretting Wear Protection by Lubricating Greases</ref>  Although an old method, this is still the leading quality control method for greases that need to avoid the false brinelling damage.

[[File:Test bearings Fafnir False Brinelling test.jpg|alt=Test bearings for ASTM D4170 False Brinelling fretting wear test|left|thumb|330x330px|Test bearings for ASTM D4170 False Brinelling fretting wear test]]


[[File:FafnirFrettingWearTester.jpg|alt=False Brinelling Fretting wear tester|center|thumb|452x452px|False Brinelling Fretting wear tester]]