Stress Measurements in Glass during Shaped-Charge Jet Penetrations

Abstract : Stresses were measured in glass targets in the vicinity of a penetrating shaped-charge jet. Stress levels of approximately 0.3 gigapascals were measured 12-20 mm away from a jet formed by a 35 mm copper liner. High speed framing camera photographs showed that the penetration velocity in the glass was 2.57 km/s and the glass fracture velocity was 2.10 km/s.