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Nomenclature
ρ 0
Initial density (kg/m
3 )
K
Elastic bulk modulus (GPa)
P crush
Pressure when the material begins to undergo plastic deformation
(MPa)
μ crush
Volumetric strain when the material begins to undergo plastic
deformation (MPa)
P lock
Compacting hydrostatic pressure (MPa)
μ plock
Volumetric strain at the compacting hydrostatic pressure
K 1
Constant
K 2
Constant
K 3
Constant
ε p
Equivalent plastic strain during a cycle of integration
μ p
Plastic volumetric strain during a cycle of integration
D 1
Damage constant
D 2
Damage constant
EFMIN
Material constant used to suppress fracture from weak tensile waves
D t
Diameter of targets (cm)
H t
Thickness of targets (cm)
V r
Residual velocity of the projectile (m/s)
d
Diameter of projectiles (cm)
V b
Volume fractions of basalt aggregate
h c
Depth of the impact crater (mm)
d c
Equivalent diameter of the impact crater (mm)
M 0
Initial mass of projectile (g)
V d
Density of projectile (kg/m
3 )
P p
Bullets perforated both the target and the rear aluminum plate
h c,f
Height of crater from front crater (mm)
h c,r
Height of crater from rear crater (mm)
d c,f
Equivalent diameter of crater from front crater (mm)
d c,r
Equivalent diameter of crater from rear crater (mm)
α s
Slope angle
d s
Diameter of the hard steel core (mm)
M p0
Initial masses of the panels (kg)
M pr
Residual masses of the panels (kg)
T t
Thickness of the panels (mm)
N
*
Projectile nose geometry factor
h per
Perforation limit
a
Half of the aggregate size (mm)
h c
Length of the hard core nose (mm)
ρ t
Density of the target (kg/m
3 )
V BL
Ballistic limit
H plug
Thickness of the rear crater (mm)
H t
Thickness of the given target plate (mm)
d a,max
Maximum aggregate size (mm)
ξ
Constraining factor
Nomenclature
ρ 0
Initial density (kg/m
3 )
K
Elastic bulk modulus (GPa)
P crush
Pressure when the material begins to undergo plastic deformation
(MPa)
μ crush
Volumetric strain when the material begins to undergo plastic
deformation (MPa)
P lock
Compacting hydrostatic pressure (MPa)
μ plock
Volumetric strain at the compacting hydrostatic pressure
K 1
Constant
K 2
Constant
K 3
Constant
ε p
Equivalent plastic strain during a cycle of integration
μ p
Plastic volumetric strain during a cycle of integration
D 1
Damage constant
D 2
Damage constant
EFMIN
Material constant used to suppress fracture from weak tensile waves
D t
Diameter of targets (cm)
H t
Thickness of targets (cm)
V r
Residual velocity of the projectile (m/s)
d
Diameter of projectiles (cm)
V b
Volume fractions of basalt aggregate
h c
Depth of the impact crater (mm)
d c
Equivalent diameter of the impact crater (mm)
M 0
Initial mass of projectile (g)
V d
Density of projectile (kg/m
3 )
P p
Bullets perforated both the target and the rear aluminum plate
h c,f
Height of crater from front crater (mm)
h c,r
Height of crater from rear crater (mm)
d c,f
Equivalent diameter of crater from front crater (mm)
d c,r
Equivalent diameter of crater from rear crater (mm)
α s
Slope angle
d s
Diameter of the hard steel core (mm)
M p0
Initial masses of the panels (kg)
M pr
Residual masses of the panels (kg)
T t
Thickness of the panels (mm)
N
*
Projectile nose geometry factor
h per
Perforation limit
a
Half of the aggregate size (mm)
h c
Length of the hard core nose (mm)
ρ t
Density of the target (kg/m
3 )
V BL
Ballistic limit
H plug
Thickness of the rear crater (mm)
H t
Thickness of the given target plate (mm)
d a,max
Maximum aggregate size (mm)
ξ
Constraining factor