@Article{icces.2023.010508,
AUTHOR = {Ge Kang, Qiumeng Ouyang, Pengwan Chen},
TITLE = {Three-Dimensional	Numerical	Manifold	Method	for	Low-Speed	Impact	 Simulation	of	PBXs},
JOURNAL = {The International Conference on Computational \& Experimental Engineering and Sciences},
VOLUME = {26},
YEAR = {2023},
NUMBER = {1},
PAGES = {1--1},
URL = {http://www.techscience.com/icces/v26n1/53893},
ISSN = {1933-2815},
ABSTRACT = {It	is	of	great	significance	to	study	the	dynamic	mechanical	response	of	explosive	charge	to	ensure	the	safety	
and	reliability	of	weapon	system.	The	manifold	method	is	a	novel	numerical	theory	proposed	in	recent	years	
to	 simulate	 the	 static	 and	 dynamic	mechanical	 behavior	 of	 solid	material.	 In	 the	 present	 work,	 a	 threedimensional	numerical	manifold	software	(3D-NMM)	based	on	continuous-discontinuous	coupled	theory	is	
developed	to	solve	the	impact	response	of	PBX.	Firstly,	based	on	the	3D	finite	element	topology,	a	four-node	
tetrahedral	 coverage	 system	 is	 established,	 and	 the	 shape	 function	 and	 displacement	 function,	 element	
stiffness	matrix	and	inertial	force	matrix	of	the	3D-NMM	are	derived.	Giving	the	cover-based	contact	theory,	
the	contact	detect	algorithm	is	 realized,	and	 the	3D-NMM	program	 framework	is	compiled.	Through	 the	
classical	 Steven	 confined	 model	 and	 viscoelastic	 statistical	 crack	 model,	 the	 effects	 of	 different	 impact	
velocities,	sizes	and	projectile	shapes	on	the	impact	mechanical	response	of	PBX	charge	were	analyzed.	The	
mechanical	response	and	ignition	of	PBX	explosives	under	low-velocity	impact	were	predicted,	and	the	lowvelocity	impact	response	mechanism	of	PBX	explosive	charge	was	revealed.	The	simulation	results	show	
that	the	3D-NMM	and	contact	algorithm	developed	in	the	present	work	are	effective	for	three-dimensional	
structure	collision	simulation.},
DOI = {10.32604/icces.2023.010508}
}