TY  - EJOU
AU  - Ouyang, Qiumeng 
AU  - Kang, Ge 
AU  - Chen, Pengwan 

TI  - Verification	of	Contact	Algorithm	for	Impact	Problems	with	Numerical	 Manifold	Method
T2  - The International Conference on Computational \& Experimental Engineering and Sciences

PY  - 2023
VL  - 25
IS  - 3
SN  - 1933-2815

AB  - Impact	 phenomenon	 is	 a	 complicated	 mechanical	 problems	 frequently	 encountered	 in	 our	 daily	 life,	
especially	in	 the	military	 field.	Numerical	manifold	method	 (NMM)	is	a	novel	numerical	 theory	which	is	
proposed	based	on	dual-topology	to	solve	the	continuous-discontinues	displacement	field	in	both	static	and	
dynamic	mechanical	problems.	 In	the	present	work,	the	3D-NMM	program	 framework	enriched	with	the	
cover-based	contact	 theory	is	developed	 to	simulate	 the	impact	mechanical	problems.	Classic	Taylor	rod	
experiments	 with	 different	 length-diameter	 ratios	 and	 hitting	 velocities	 (150-250m/s)	 are	 systematic	
conducted	 with	 ourselves	 code.	 The	 simulation	 shows	 that	 as	 the	 impact	 speed	 increasing,	 the	 plastic	
deformation	 of	 the	 rod	 gradually	 increased,	 and	 there	 is	 also	 a	 significant	 upsetting	 of	 the	 impact	 end.	
Otherwise,	by	comparing	the	results	of	NMM	with	FEM,	it	is	observed	that	the	deformation	field	of	NMM	
result	are	in	great	agreement	with	FEM’s	within	the	allowable	error	range.	The	present	study	successfully	
verified	 that	 our	 3D-NMM	 is	 suitable	 for	 solving	 structural	 deformation	 and	 dynamic	 impact	 problems,	
which	shows	a	very	broad	application	prospect	and	research	value	in	the	field	of	continuous-discontinuous	
structural	mechanics.
KW  - Numerical	manifold	method; 3D-NMM;	contact	algorithm;	impact

DO  - 10.32604/icces.2023.010514