Showing papers on "Ballistic impact published in 1990"

Modeling ballistic impact into flexible materials

Abstract: The dynamic problem is approximated by a time series of static analysis problems. An algorithm is described wherein in each time step the material properties of the target and the geometry of the deflection cone are derived.An experimental program was performed involving bullets fired at Kevlar 29 fabric targets.

Ballistic protective insert for use with soft body armor by female personnel

Abstract: A ballistic protective insert for use with soft body armor by female personnel is disclosed. The ballistic protective insert provides enhanced protection to female breast tissue which is uniquely susceptible to the harmful effects of blunt trauma from ballistic impact. The ballistic protective insert is a rigid, inflexible cup worn over a woman's breast and under a conventional soft body armor vest. The insert is preferably made of SPECTRA SHIELD, a high strength polyethylene material, sheets laminated together with epoxy. The protective insert appears to work by a combination of dynamic effects. The dynamic effects include redirecting ballistic impact forces to the muscular chest wall surrounding the breasts, and creating a compression wave inside the breast which reflects off the chest wall as a tension wave and then tends to push the insert away from the breast. The protective inserts resist any significant deformation for as long as possible to reduce impact intensity. The protective inserts also increase the snugness of the fit of conventional soft body armor which maximizes the energy absorption ability of the ballistic fabric from which soft body armor is made.