204
7 Impact Resistance of Armor Steel/Ceramic/UHPCC Layered …
Projectile
SiC ceramic plate
UHPCC target
Projectile
SiC ceramic plate
10CrNi3MoV21A
armor steel plate
10CrNi3MoV21A
armor steel plate
350mm
500mm
Fig. 7.16 2D axisymmetric FE model of S5/C6 scenario
1 mm to ensure the calculation efficiency as well as the numerical convergence. ALE
algorithm is applied to the projectile for sake of the analysis of large deformation.
Besides, the *CONTACT_2D_AUTOMATIC_SINGLE_SURFACE is implemented
to reproduce the interactions between the projectile and target. The 10CrNi3MoV21A
armor steel and SiC ceramic are therefore regarded as circle plates with diameters
equaling to the side lengths of the actual target plates. It is worth pointing out that, the
boundary effect on penetration depth in the present axisymmetric model is ignored
since the side lengths of the armor steel and ceramic plates (200 and 150 mm) are
already more than five times than that of the projectile shank diameter (30 mm).
7.2.2.2 Constitutive Model and Parameters
The appropriate constitutive models as well as the detailed parameters are of
vital importance to the accuracy of numerical simulations. As for the projectile,
according to the recovered projectiles shown in Fig. 7.8, the material models
of *MAT_JOHNSON_COOK (denoted as JC model) with equation of state
EOS_GRUNEISEN and *MAT_RIGID are adopted to represent the abrasive and
rigid response of projectiles in the current study, respectively. Based on the static
and dynamic mechanical tests on 30CrMnSiNi2A steel with Vickers hardness of 45
carried out by Li et al. (2017), the rigid and JC constitutive model parameters for the
projectile are listed in Tables 7.7 and 7.8.
For
the
ceramic
plate,
a
widely
used
constitutive
model
*MAT_JOHNSON_HOLMQUIST _CERAMICS, namely, the JH-2 model (Johnson
and Holmquist 1994) is adopted to simulate the brittle behavior of the present SiC
7 Impact Resistance of Armor Steel/Ceramic/UHPCC Layered …
Projectile
SiC ceramic plate
UHPCC target
Projectile
SiC ceramic plate
10CrNi3MoV21A
armor steel plate
10CrNi3MoV21A
armor steel plate
350mm
500mm
Fig. 7.16 2D axisymmetric FE model of S5/C6 scenario
1 mm to ensure the calculation efficiency as well as the numerical convergence. ALE
algorithm is applied to the projectile for sake of the analysis of large deformation.
Besides, the *CONTACT_2D_AUTOMATIC_SINGLE_SURFACE is implemented
to reproduce the interactions between the projectile and target. The 10CrNi3MoV21A
armor steel and SiC ceramic are therefore regarded as circle plates with diameters
equaling to the side lengths of the actual target plates. It is worth pointing out that, the
boundary effect on penetration depth in the present axisymmetric model is ignored
since the side lengths of the armor steel and ceramic plates (200 and 150 mm) are
already more than five times than that of the projectile shank diameter (30 mm).
7.2.2.2 Constitutive Model and Parameters
The appropriate constitutive models as well as the detailed parameters are of
vital importance to the accuracy of numerical simulations. As for the projectile,
according to the recovered projectiles shown in Fig. 7.8, the material models
of *MAT_JOHNSON_COOK (denoted as JC model) with equation of state
EOS_GRUNEISEN and *MAT_RIGID are adopted to represent the abrasive and
rigid response of projectiles in the current study, respectively. Based on the static
and dynamic mechanical tests on 30CrMnSiNi2A steel with Vickers hardness of 45
carried out by Li et al. (2017), the rigid and JC constitutive model parameters for the
projectile are listed in Tables 7.7 and 7.8.
For
the
ceramic
plate,
a
widely
used
constitutive
model
*MAT_JOHNSON_HOLMQUIST _CERAMICS, namely, the JH-2 model (Johnson
and Holmquist 1994) is adopted to simulate the brittle behavior of the present SiC