Effect of Explosive Reactive Armour Cover Plate on Interaction of ERA and Explosively Formed Projectile

Table 1

Material models and their properties used.

Material	Material model & equation of state property input data (units: cm, g, µs)
Composition A3	MAT_HIGH_EXPLOSIVE_BURN
	RO	D	PCJ
	1.6500	0.8300	0.3000
	EOS_JWL
	A	B	R1	R2	OMEG	E0	VO
	6.1130	0.1065	4.4000	1.2000	0.3200	0.0890	1.000
Air	MAT_NULL
	RO	PC	MU
	1.29E-3	0.000	0.000
	EOS_LINEAR_POLYNOMIAL
	C0	C1	C2	C3	C4	C5	C6	E0	V0
	−1.00E6	0.000	0.000	0.000	0.400	0.400	0.000	2.50E-6	1.000
Copper	MAT_STEINBERG
	RO	G0	SIGO	BETA	N	GAMA	SIGM	RO	B
	8.93	0.477	0.120E-2	36.0	0.450	0.00	0.640E-2	8.93	2.83
	BP	H	F	A	TMO	GAMO	SA	PC	SPALL
	2.83	0.377E-3	0.10E-2	63.5	0.179E4	2.02	1.50	−9.00	3.00
	EOS_GRUNEISEN
	C	S1	S2	S3	GAMA	A	E0	V0
	0.394	1.49	0.00	0.00	2.02	0.470	0.00	1.000
4340 (EFP casing)	MAT_JOHNSON_COOK
	RO	G	A	B	N	C	M	TM	TR
	7.830	0.770	0.00792	0.00510	0.26	0.014	1.03	1793.00	300
	EPSO	CP	D1	D2	D3	D4	D5
	1E5	1.69	0.05	3.440	−2.12	0.002	0.61
	EOS_GRUNEISEN
	C	S1	S2	S3	GAMA	A	E0	V0
	0.3574	1.92	0.00	0.00	1.69	0.43	0.00	1.000
Steel A36 (cover plate, ERA plates & target)	MAT_JOHNSON_COOK
	RO	G	A	B	N	C	M	TM	TR
	7.890	0.750	0.00286	0.0050	0.2282	0.022	0.917	1811.00	300
	EPSO	CP	D1	D2	D3	D4	D5
	1E5	1.69	0.4025	1.107	−1.899	0.009607	0.30
	EOS_GRUNEISEN
	C	S1	S2	S3	GAMA	A	E0	V0
	0.4569	1.49	0.00	0.00	2.17	0.43	0.00	1.000
C-4	MAT_ELASTIC_PLASTIC_HYDRO
	RO	G	SIGY	EH	PC	FS	CHARL
	1.601	0.0440	2.00-3	0.00	0.00		2.00
	EOS_IGNITION_AND_GROWTH_OF_REACTION_IN_HE
	A	B	XP1	XP2	FRER	G	R1	R2	R3
	6.0977	0.1295	4.50	1.40	0.667	0.25e-5	778.1	−0.05031	2.223e-5
	R5	R6	FMXIG	FREQ	GROW	EM	AR1	ES1	CVP
	11.3	1.13	0.3	1000	120	2	0.333	0.667	1e-5
	CVR	EETAL	CCRIT	ENQ	TMP0	GROW2	EN	FMXGR	FMNGR
	2.78e-5	4.0	0.0	0.104	298	1000	2.0	0.5	0.02