Showing papers on "Ballistic impact published in 1983"
Patent•
21 Nov 1983
TL;DR: In this paper, a method for repairing ballistic impact damage to structural panels of vehicles comprising the steps of cutting out the damaged area in the panel in a preselected size circular cutout, bending a circular patch including an exterior circular metal sheet laminated to a smaller circular interior cloth layer to match the surface convolutions of the panel, impregnating the internal cloth layer with resin and attaching the patch to the panel.
Abstract: A method for repairing ballistic impact damage to structural panels of vehicles comprising the steps of cutting out the damaged area in the panel in a preselected size circular cutout, bending a circular patch including an exterior circular metal sheet laminated to a smaller circular interior cloth layer to match the surface convolutions of the panel, impregnating the interior cloth layer with resin and attaching the patch to the panel. In this manner the patch is bent to fit before impregnation and is fixed to the bent shape by fixing the cloth layer.
42 citations
01 Dec 1983
TL;DR: In this paper, techniques were developed and incorporated into EPIC-2, a Lagrangian finite element impact code, to accomplish the dynamic relocation of sliding surfaces, which was necessary in order to model ballistic impact situations involving deep penetration and/or perforation of targets.
Abstract: : Techniques were developed and incorporated into EPIC-2, a Lagrangian finite element impact code, to accomplish the dynamic relocation of sliding surfaces. This development was necessary in order to model ballistic impact situations involving deep penetration and/or perforation of targets. These techniques were first applied to the modeling of axisymmetric ballistic impact situations involving kinetic energy penetrators versus targets which failed by plugging due to high strains. The development of the criteria required for target failure to begin and proceed naturally is included.
3 citations
TL;DR: In this article, the authors showed that thin monolithic carbon fiber reinforced panels can be adhesively repaired to restore the damaged tensile strength to between 85% and 90% of the original, using a wet laminating repair patch technique and a precured patch technique.
Abstract: This report shows that thin monolithic Carbon Fibre Reinforced Panels impacted with small arms projectiles can be adhesively repaired restoring the damaged panel tensile strength to between 85% and 90% of the original. The compressive buckling strength of the thin CFC panels was found not to be significantly affected by ballistic impacting. The repair is primarily concerned with single-sided repairs utilizing a wet laminating repair patch technique and a precured patch technique. The repair research showed that for the particular impact damage sustained by the CFC panels there existed optimum repair patch physical parameters (i.e. overlap length and ply composition) for strength restorations above 85%. The research highlighted a number of repair techniques which adversely affected strength restorations. These techniques involved the removal of the damage area, use of precured square patches and the use of narrow repair patches.