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Effect of Shear Reinforcement and Steel Liner on Ballistic Resistance of Reinforced Concrete Targets under Flat and Hemisphere Nose Missile Impact

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Abstract

Reinforced concrete (RC) is widely utilized in protective structures which might be exposed to high strain rate loadings, missile impacts, explosives and accidental or intentional attacks. Though many experimental and numerical studies are available in the literature to understand and improve the ballistic performance of reinforced, pre-stressed and fiber reinforced targets of ultra high and high performance of concrete. Limited studies are available to quantify the effect of shear reinforcement in resisting the impact load. This paper is an attempt to numerically compare the ballistic performance of RC targets with steel liner and special types of shear reinforcement arrangements subjected to hard missile impact with consideration of shape of the missile nose i.e., flat nose and hemisphere nose missile. Square targets (1200 × 1200 mm) of thickness 180 mm were subjected to normal missile impact by 11.75 kg, flat nose and hemisphere nose missiles of diameter 80 mm and length 300 mm. Numerical simulations were carried out in LS-Dyna and striking velocities were varied from 100 to 150 m/s. Penetration depth, residual velocity, ejected mass and ballistic resistance of RC targets for the five distinct confinements and steel liner at rear face have been discussed and compared for the two missiles. Double Laced RC and steel liner at the rear face found to be effective in reducing the penetration depth, residual velocity and improving ballistic performance. Even though the penetration depth, residual velocity is less when the targets are subjected to flat nose compare to hemisphere nose the damage in terms of ejected mass is more in flat nose.

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This work was supported by ongoing institutional funding. No additional grants to carry out or direct this particular research were obtained.

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  1. School of Civil Engineering, Vellore Institute of Technology, Chennai Campus, 600127, Chennai, India

    Talapa Reddy Suman Kumar & I Yamini Sreevalli

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  1. Talapa Reddy Suman Kumar
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  2. I Yamini Sreevalli
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Correspondence to I Yamini Sreevalli.

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Kumar, T.R., Sreevalli, I.Y. Effect of Shear Reinforcement and Steel Liner on Ballistic Resistance of Reinforced Concrete Targets under Flat and Hemisphere Nose Missile Impact. Mech. Solids 58, 2319–2332 (2023). https://doi.org/10.3103/S0025654423601143

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