Fragmentation of Millimeter-Size Hypervelocity Projectiles on Combined Mesh-Plate Bumpers

Table 2

Properties of materials.

Component of material model	Property	Dimensionality	Al1100-H12	Al6061-T6	4340 Steel
Equation of state	Reference density	g/cm^3	2.707	2.703	7.860
	Gruneisen gamma	—	1.970	1.970	1.670
		m/s	5386	5240	4578
			1.339	1.400	1.330
	Ref. temperature	K	293	293	293
	Specific heat	J/kgK	884	885	477
Strength model	Shear modulus	MPa	24722	26000	77000
	Yield stress	MPa	148	324	792
	Hardening constant	MPa	345	114	510
	Hardening exponent	—	0.183	0.420	0.260
	Strain rate constant	—	0.001	0.002	0.014
	Thermal softening exponent	—	0.859	1.340	1.030
	Melting temperature	K	893	925	1793
	Reference strain rate	/s	1.000	1.000	1.000
Failure model	Damage constant,	—	0.071	−0.770	0.050
	Damage constant,	—	1.248	1.450	3.440
	Damage constant,	—	−1.142	−0.470	−2.120
	Damage constant,	—	0.147	0.000	0.002
	Damage constant,	—	1.000	1.600	0.610