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Strain Behavior of Concrete Panels Subjected to Different Nose Shapes of Projectile Impact

Department of Architectural Engineering, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Korea
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Materials 2018, 11(3), 409; https://doi.org/10.3390/ma11030409
Received: 21 February 2018 / Revised: 6 March 2018 / Accepted: 7 March 2018 / Published: 9 March 2018
This study evaluates the fracture properties and rear-face strain distribution of nonreinforced and hooked steel fiber-reinforced concrete panels penetrated by projectiles of three different nose shapes: sharp, hemispherical, and flat. The sharp projectile nose resulted in a deeper penetration because of the concentration of the impact force. Conversely, the flat projectile nose resulted in shallower penetrations. The penetration based on different projectile nose shapes is directly related to the impact force transmitted to the rear face. Scabbing can be more accurately predicted by the tensile strain on the rear face of concrete due to the projectile nose shape. The tensile strain on the rear face of the concrete was reduced by the hooked steel fiber reinforcement because the hooked steel fiber absorbed some of the impact stress transmitted to the rear face of the concrete. Consequently, the strain behavior on the rear face of concrete according to the projectile nose shape was confirmed. View Full-Text
Keywords: projectile nose shape; strain behavior; impact; fiber-reinforced concrete projectile nose shape; strain behavior; impact; fiber-reinforced concrete
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Lee, S.; Kim, G.; Kim, H.; Son, M.; Choe, G.; Nam, J. Strain Behavior of Concrete Panels Subjected to Different Nose Shapes of Projectile Impact. Materials 2018, 11, 409.

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