TY  - EJOU
AU  - Li, Xiang 
AU  - Huang, Guangyan 
AU  - Guo, Zhiwei 

TI  - Comparison	of	Results	Used	Smooth	Particle	Hydrodynamics	Method and	 Lagrange	Method	Based	on	Segmental	Uncoupled	Charge
T2  - The International Conference on Computational \& Experimental Engineering and Sciences

PY  - 2023
VL  - 26
IS  - 4
SN  - 1933-2815

AB  - SPH	method	is	widely	used	to	study	the	dynamic	response	of	metal	casing	under	explosive	loading	because	
of	its	 superiority	in	 simulating	metal	 fracture	 phenomenon [1-3].	The	 distribution	 of	 the	 fragment	 from	
uncoupled	charge	structures	with	segmental	shaped	explosive	were	studied.	The	X-ray	photographic	images	
of	fragmentation	obtained	from	explosion	experiment	were	compared	with	the	numerical	results	based	on	
SPH	 method and	 Lagrange	 method.	 The	 fragmentation	 shows	 that	 the	 numerical	 results	 based	 on	 the	
Lagrange	method	are	in	good	agreement	with	the	experimental	results	while	some	errors	appear	in	results	
based	on	SPH	method.	The	velocity	of	the	fragments	at	the	bottom	of	the	casing	in	the	SPH	results	is	28.4%	
lower	than	that	of	the	experimental	results	and	Lagrange	results.	The	velocity	distribution	curve	shows	that	
surge	 of	 velocity	 appears	in	 the	 range	 from	-90°	 to	 – 85°,	where	 the	 difference	 between	 two	 numerical	
methods occurred.	In	this	paper,	the	differences	between	SPH	method	and	Lagrange	method	were obtained	
and	 the	mechanism	 of	 the	 differences	involved	is	 revealed.	 The	 conclusion	 provides	 a	 reference	 for	 the	
application	of	meshless	methods	in	the	research	of	metal	materials	under	explosive	loading.
KW  - SPH	method;	lagrange	method;	explosion;	X-ray	photography

DO  - 10.32604/icces.2023.09269