@Article{icces.2023.010044,
AUTHOR = {Qilin Xiong, Wen	An, Chuanzhi Liu},
TITLE = {Shear	Localization	in	Polycrystalline	Metal	at	High-Strain	Rates	with	 Dynamic	Recrystallization:	Crystal	Plasticity	Modeling	and	Texture	Effect},
JOURNAL = {The International Conference on Computational \& Experimental Engineering and Sciences},
VOLUME = {25},
YEAR = {2023},
NUMBER = {3},
PAGES = {1--1},
URL = {http://www.techscience.com/icces/v25n3/53842},
ISSN = {1933-2815},
ABSTRACT = {Shear	localization	is	an	important	failure	mode,	or	even	the	dominant	mode	in	metals	at	high-strain	rates.	
However,	it	is	a	great	challenge	to	accurately	predict	the	occurrence	and	evolution	of	shear	localization	in	
metals	at	the	high-strain	rate	deformation.	Here,	a	dislocation-based	crystal	plasticity	constitutive	model	
with	 a	 crucial	 mechanism	 of	 shear	 instability,	 namely	 dynamic	 recrystallization,	 was	 developed.	 The	
evolution	equations	of	dislocation	density	and	grain	size	in	the	process	of	dynamic	recrystallization	were	
proposed	and	incorporated	into	the	new	constitutive	model.	The	threshold	of	the	stored	energy	in	crystals	
was	 used	 as	 the	 criterion	 for	 the	 occurrence	 of	 dynamic	 recrystallization.	 Dynamic	 compression	 of	 a	
nanograin	Cu-Al	alloy	was	performed	using	the	crystal	plasticity	finite	element	method	based	on	the	new	
constitutive	model,	and	good	agreement	of	 the	numerical	prediction	with	 the	existing	experimental	data	
validates	the	new	constitutive	model.	The	results	show	dynamic	recrystallization can	be	a	more	dominant	
mechanism	for	the	occurrence	of	shear	instability	than	thermal	softening.	In	addition,	dynamic	tension	and	
shear	of	the	Cu-Al	alloys	with	five	typical	textures	were	also	simulated,	showing	that	both	loading	mode	and	
texture	can	significantly	affect	the	formation	of	shear	localization.	This	work	is	helpful	for	us	to	understand	
the	role	of	microstructural	evolution	in	the	formation	of	shear	localization	at	high-strain	rates	and	to	design	
the	microstructure	for	artificially	controlling	or	preventing	the	formation	of	shear	localization.},
DOI = {10.32604/icces.2023.010044}
}