A case of wear particle formation through shearing-off at contact spots interlocked through microroughness in adhesive wear

Wear ◽  
1987 ◽  
Vol 120 (2) ◽  
pp. 175-197 ◽  
Author(s):  
Yu Jun Chang ◽  
D. Kuhlmann-Wilsdorf
Keyword(s):  
Adhesive Wear ◽  
Wear Particle ◽  
Particle Formation ◽  
Contact Spots

Adhesive Wear Based on Accurate FEA Study of Asperity Contact and n-Point Asperity Model

2016 ◽  
Vol 4 (1) ◽  
pp. 1-24
Author(s):  
Ajay K. Waghmare ◽  
Prasanta Sahoo
Keyword(s):  
Adhesive Wear ◽  
Complete Solution ◽  
Wear Particle ◽  
Wear Volume ◽  
Asperity Contact ◽  
Wear Model ◽  
Element Analysis ◽  
Particle Generation ◽  
Elastic Plastic ◽  
Asperity Model

The paper describes a theoretical study of adhesive wear based on accurate finite element analysis (FEA) of elastic-plastic contact of single asperity and n-point asperity model. The wear model developed considers wear particle generation in whole range of deformation, ranging from fully elastic through elastic-plastic to fully plastic. Well defined adhesion index and plasticity index are used to study the prospective situations arising out of variation in load, material properties, and surface roughness. It is observed that the wear volume at particular level of separation increases with increase in plastic deformation and adhesion effect. Materials having higher tendency to adhesion show higher wear rate. Trend of the results obtained is found in line with the existing solutions which are modeled with conventional asperity concept. Inclusion of separate formulations for intermediate state of deformation of asperities which are based on accurate FEA study gives complete solution.

scholarly journals A DISCRETE ELEMENT FORMALISM FOR MODELLING WEAR PARTICLE FORMATION IN CONTACT BETWEEN SLIDING METALS

2021 ◽  
Vol 19 (1) ◽  
pp. 007
Author(s):  
Evgeny V. Shilko ◽  
Aleksandr S. Grigoriev ◽  
Alexey Yu. Smolin
Keyword(s):  
Qualitative Difference ◽  
Wear Particle ◽  
Discrete Element ◽  
Wear Particles ◽  
Surface Adhesion ◽  
Ductile Materials ◽  
Preliminary Study ◽  
Work Of Deformation ◽  
Friction Dynamics ◽  
Contact Spots

The paper describes an advanced discrete-element based mechanical model, which allows modelling contact interaction of ductile materials with taking into account fracture and surface adhesion by the cold welding mechanism. The model describes these competitive processes from a unified standpoint and uses plastic work of deformation as a criterion of both local fracture and chemical bonding of surfaces in contact spots. Using this model, we carried out a preliminary study of the formation of wear particles and wedges during the friction of rough metal surfaces and the influence of the type of forming third body (interfacial) elements on the dynamics of the friction coefficient. The qualitative difference of friction dynamics in the areas of the contact zone characterized by different degrees of mechanical confinement is shown.

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