Thick plain concrete targets subjected to high speed penetration of 30CrMnSiNi2A steel projectiles: Tests and analyses

Influence of Calcined Bauxite Aggregate on the Resistance of Cement Composites Subjected to Small Caliber Deformable Projectile Impact

“…In contrast, the CDs and CVs appeared unaffected by the striking velocities. This is consistent with those reported in (Maalej et al, 2005;Feng et al, 2018). Therefore, the DOPs are normalized with respect to the striking velocities in the following analyses and discussions, but the CDs and CVs are not adjusted.…”

“…In contrast to the extensive investigations on the behavior of cement composites subjected to non-deformable HVPI, only a limited number of experimental studies are devoted to deformable HVPI (Gold et al, 1996;Nia et al, 2014;Kong et al, 2017;Feng et al, 2018). Furthermore, among those limited studies, focus was placed on the influence of striking velocity.…”

A semi-empirical formula based on a modified general penetration resistance for predicting the motion of the rigid projectile

“…For ease of reference, the formula based on general penetration resistance is denoted as the GPR formula. The next section gives applications of this GPR formula on the penetration data from Piekutowski et al [ 23 ] and Feng et al [ 24 ], a comparison of Forrestal’s form is also given.…”

“…However, as concluded by Forrestal et al [ 17 ], their formula can not properly predict deceleration histories, the predicted results show large deviations toward the end of the penetration event. Besides, the penetration depth results from Piekutowski et al [ 23 ] for rigid steel rods impacting aluminum 6061 targets and from Feng et al [ 24 ] for rigid steel projectile penetrating concrete with average compressive strength of 47.6 MPa are worth attention. Those two sets of tests feature with a large range of the rigid penetration velocity (up to 1.8 km/s for aluminum and 1.5 km/s for concrete) without any apparent deformation of these projectiles, which is suitable to assess the performance of the semi-empirical formula.…”

“…To this end, the total motion equation of the projectile including both the entrance stage and tunnel stage is established. Then, the performance of GPR is checked by comparing with the specific test data from Piekutowski et al [ 23 ] and Feng et al [ 24 ]. Also, a comparison of Forrestal’s form is given.…”