@Article{icces.2023.010001,
AUTHOR = {Xiaoliang Deng},
TITLE = {Investigation	of	Dynamic	Damage	Response	of	PBX	Using	Peridynamics	 Simulation},
JOURNAL = {The International Conference on Computational \& Experimental Engineering and Sciences},
VOLUME = {25},
YEAR = {2023},
NUMBER = {1},
PAGES = {1--1},
URL = {http://www.techscience.com/icces/v25n1/53818},
ISSN = {1933-2815},
ABSTRACT = {Polymer	bonded	explosives	(PBXs)	are	one	of	typical	heterogeneous	materials	comprised	of	solid	energetic	
particles	 surrounded	by	a	polymer	binder.	PBXs	are	widely	encountered	in	 various	applications	 such	as	
rocket	propellants	and	main	explosive	 charges.	PBXs	 can	ignite	 or	detonate	due	 to	an	accidental	impact	
loading,	which	usually	leads	to	serious	losses	to	personnel	and	property.	Therefore,	safety	of	PBXs	regarding	
to	various	loading	conditions	is	of	great	concern.	<br/>
The	ignition	of	PBXs	due	to	impact	is	a	mechanical-thermal-chemical	coupled	phenomenon.	The	evolutions	
of	micro-cracks	and	 other	damage	behaviors	are	essential	 to	help	understanding	 of	ignition	phenomena	
induced	by	low-medium	impact	velocities	but	relatively	long	duration	period,	which	is	referred	to	the	nonshock	ignition.	A	mechanical-thermal-chemical	coupled	framework	based	on	peridynamics	(PD)	focusing	on	
the	 non-shock	 ignition	 of	 explosives	 was	 developed.	 Then	 the	 dynamic	 damage	 response	 of	 PBX	 under	
impact	loading	was	investigated.	The	PD	simulation	results	indicated	that	the	inter-granular	damage	and	
trans-granular	 damage	 can	 occur	 during	 the	 impact	 process	 and	 the	 damage	 patterns	 of	 explosive	 are	
actually	dependent	on	both	the	impact	strength	and	material	properties.	Moreover,	the	effects	of	external	
confinement	on	dynamic	response	of	PBX	were	also	investigated.	The	combined	influences	of	stress	wave	
dynamics	and	impact	speeds	on	dynamic	damage	of	PBX	was	highlighted.	The	ignition	behaviors	of	PBX	in	
a	confinement	structure	under	various	impact	speeds	were	also	discussed	based	on	PD	simulation	results.	
The	simulation	results	show	that	PD	can	well	capture	the	characteristics	of	dynamic	damage	behaviors	of	
PBXs.	The	mechanical-thermal-chemical	coupled	framework	based	on	PD	theory	can	be	an	effective	tool	to	
simulate	 non-shock	 ignition	 of	 PBX	 under	 impact	 loading	 due	 to	 its	 advantage	 allowing	 spontaneous	
formation	and	evolution	of	cracks.},
DOI = {10.32604/icces.2023.010001}
}