THE JOURNAL OF KMUTNB

Volume 32, No. 02, Month APRIL, Year 2022, Pages 305 - 316

Development of steel fiber reinforced concrete panels to resist impact from 7.62 x 51 mm caliber size bullets

Apisit Techaphatthanakon, Buchit Maho, Sittisak Jamnam, Piti Sukontasukkul

Abstract Download PDF

This research aimed to develop the steel fiber reinforced concrete panels with an ability to resist impact force from 7.62 × 51 mm caliber size bullet. The panels were steel fiber reinforced concrete with 2% volume fraction of fiber and thickness varied from 10–100 mm. For the experimental procedure, the panel was shot by a bullet at the center and the impact event was captured using a high-speed camera with capture rate of 40,000 fps. In the data analysis, the kinetic energy absorption of panel can be calculated from the difference between the bullet kinetic energy (before and after impaction). The bullet velocities were calculated from images captured by the high-speed camera. The results showed that the impact resistance and the kinetic energy absorption ability increased with the increasing panel thickness. The bullet was resisted by the panel thickness of 60 mm but was observed the spalling and flying debris at the back surface. With the thickness larger than 80 mm, no perforation and cracking were observed on back surface. The damages of the panel (measured in forms of spalling diameter and weight loss percentage) related to the kinetic energy absorption ability of panel (Ep).

Keywords

Steel Fiber Reinforced Concrete Panel; 7.62 ? 51 mm Size Bullet; Kinetic Energy Absorption Ability; Spalling Diameter; Weight Loss Percentage

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