Oblique penetration of a rigid projectile into an elastic-plastic target

Oblique Perforation of Thick Metallic Plates by Rigid Projectiles

“…Meanwhile, the occurrence of ricochet is very sensitive to the initial obliquity near the critical angle. In fact, the predictions made by Roisman et al [22] do not match their experimental results too. They attributed the discrepancies between the predicted and experimental residual velocities to "such phenomena as: projectile failure or breakup during penetration; inaccuracy of the reported obliquity angles; and the necessity to estimate the target yield stress due to lack of data".…”

“…Within the test range of impact obliquity, i.e., β ≤ 60 • , Gupta and Madhu [21] reported no ricochet occurring for all AL3 specimens. Table 1 lists the test data registered by Roisman et al [22] and their predictions for the residual velocity, and compares them with the predictions of the present model. Most of those tests are oblique perforations at large obliquity, i.e., β > 50 • , close to the critical angle of ricochet.…”

“…Comparison of theoretical prediction with experimental values of residual velocity for oblique perforation at large obliquity Nose Target Impact velocity Impact Thickness of V r /(m s −1 ) pre-V r /(m s −1 ) V r /(m s −1 ) preshape material V 0 /(m s −1 ) obliquity β/( • ) plates H/mm dicted in ref [22]. tested in ref [22].…”

Early response of soils to violent disturbances

“…Unfortunately, most of the work done on projectile penetration has focused on steel, metal and aluminum targets with different thickness such as thick, intermediate and thin plates. The analysis of modern state of the problem of analytical of highvelocity penetration of a projectile in target can be found in works by Forrestal ([3], [4]), Warren and Forrestal [11], Yarin et al [9], Bachman and Goldsmith [2], Chen and Li [5] and Roisman [10]. However, sufficient data is available so that an equation of state for certain soils can be obtained.…”

Numerical–analytical model of penetration of long elastically deformable projectiles into semi-infinite targets

“…Analytical modeling of high-velocity penetration into assorted targets by non-deformable projectiles has been carried out by Forrestal et al [7][8][9], Warren and Forrestal [12], Yarin et al [16,17], Yossifon [14], Chen and Li [15] and other researchers (see, e.g. Ben-Dor et al [18]).…”