Investigation on Bullet Resistant of Steel Fiber Reinforced Concrete Panel Subjected to .44 Magnum Bullet
This research was to investigate the failure patterns and energy absorption of steel fiber-reinforced concrete plates. The concrete plates were subjected to .44 Magnum bullet direct fire weapons under the U.S. National Institute of Justice (NIJ) standard. The 400 x 400 mm concrete plates were reinforced at 1%, 2% and 3% by volume of concrete with different thickness. During the test, each plate was shot by a bullet at a center of the plate. Two ballistic chronographs (velocity measuring) were placed at front and back of the tested plates at a distance of 2.5 and 0.3 meter respective. The result shows that the failure patterns of concrete plates are dependent on several factors such as thickness of the concrete plates, steel fiber content and number of shot. Typical failure patterns are perforation, scabbing, spalling, and cracking. However, few plates had no damage. Also, the energy absorption also depends on thickness of the concrete plate and volume fractions of the steel fiber.