TY  - EJOU
AU  - Hu, Jianqiao 
AU  - Song, Hengxu 
AU  - Xiaoming	Liu, 

TI  - Rate	Effect	of	Adhesive	Wear	Due	to	Asperity	Plowing
T2  - The International Conference on Computational \& Experimental Engineering and Sciences

PY  - 2023
VL  - 26
IS  - 1
SN  - 1933-2815

AB  - Material	 wear	 between	 contact	 surfaces	 with	 relatively	 sliding	 can	 be	 related	 to	 the	 failure	 of	 elevated	
asperities	 at	 small	 scales.	 The	 asperity	 wear	 depends	 on	 various	 factors,	 including	 material	 properties,	
interfacial	 adhesion,	 and	 friction	 velocity. In	 this	 study,	 using	 a	 series	 of	materials	 characterized	 by	 the	
modified	coarse-grained	potentials,	we	studied	the	rate	effect	of	adhesive	wear	at	the	asperity	level over	a	
wide	range	of	plowing	conditions.	The	results	showed	that	increasing	plowing	velocity	leads	to	the	transition	
of	the	wear	mechanism from	plasticity-induced	asperity	smoothing	to	the	formation	of	fractured	debris and
thus	breaks	down	the	Archard	wear	law. For	asperity	wear	dominated	by	plasticity,	the	wear	rate	decreases	
as	the	velocity	increases;	this	is	because	the	contact	force	during	asperity	collisions	strongly	depends	on	the	
plowing	 velocity,	whereas	 the	wear	 volume	 exhibits	weak	 velocity	 dependence.	 As	 the	 plowing	 velocity	
increases,	the	fractured	wear	debris	forms	and	dramatically	increases	wear	volume	and	thus	a	larger	wear	
rate.	Furthermore,	it	was	found	that	decreasing	interfacial	adhesion	leads	to	a	smaller	wear	volume	and	yet	
a	 higher	 contact	 force.	 Our	 findings	 provide	 insight	 into	 the	 velocity	 dependence	 of	 wear	 rate	 in	 the	
tribological	test.
KW  - Adhesive	wear;	rate	effect;	asperity	plowing;	molecular	dynamics;	wear	debris

DO  - 10.32604/icces.2023.010554