finite element analysis as implemented in LS-DYNA. Validation of numerical modelling includes
a comprehensive mesh convergence study leading to insights not previously reported in literature,
using shell, solid, and axisymmetric elements for representing target plates. It is shown for a number
of cases that with a proper choice of contact algorithm, element size, and strain rate-dependent material
properties, computed projectile residual velocities can match closely with corresponding test-based
values. The modelling requirements are arrived at by correlating against published test residual velocities1
for variants of mild steel plates (designated as MS1, MS2 and MS3) of different thicknesses at impact
velocities in the range of ~820-870 m/s. Using the validated numerical procedure, a number of parametric
studies such as the effect of projectile shape and geometric aspect ratios as well as plate thickness on
residual velocity have been carried out and presented in Part II of the current paper