A crystal plasticity assessment of normally-loaded sliding contact in rough surfaces and galling

An investigation of rough metal to metal contacting surfaces under normal load and undergoing sliding has been carried out with explicit representation of measured surface profiles within a crystal plasticity finite element formulation in which grain size, texture and slip properties are incorporate...

Full description

Saved in:
Bibliographic Details
Published in:Journal of the mechanics and physics of solids 2018-12, Vol.121, p.517-542
Main Authors: Barzdajn, Bartosz, Paxton, Anthony T., Stewart, David, Dunne, Fionn P.E.
Format: Article
Language:English
Subjects:
Asperity
Austenitic stainless steels
Confidence limits
crystal plasticity
Finite element analysis
Finite element method
Frequency distribution
Galling
Grain size
Plastic properties
Plastics
Qualitative analysis
Rough surfaces
Scientific method
Sliding
Sliding contact
Statistical analysis
Weibull distribution
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:An investigation of rough metal to metal contacting surfaces under normal load and undergoing sliding has been carried out with explicit representation of measured surface profiles within a crystal plasticity finite element formulation in which grain size, texture and slip properties are incorporated. A new metric called plastic reach has been introduced for contacting surfaces which reflects both the magnitude of the local surface asperity plasticity and its spatial reach. This quantity has been shown to obey a power law relationship with the applied normal load for sliding contact which in turn has been related to a hazard function. In this way, a new methodology to predict the galling frequency that follows a Weibull distribution has been established. Additionally, a quantitative definition of galling for the class of metal on metal contacting surfaces is considered. The predicted galling frequency distribution for a 316 stainless steel has been compared with independently experimentally measured galling frequencies showing qualitative agreement of the distributions. An assessment of confidence limits has also therefore been provided for the modelling methodology.
ISSN:0022-5096
1873-4782
DOI:10.1016/j.jmps.2018.08.004