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Computers and Concrete Volume 9, Number 1, January 2012 , pages 21-33 DOI: https://doi.org/10.12989/cac.2012.9.1.021 |
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A numerical study on the damage of projectile impact on concrete targets |
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Gang Lu, Xibing Li and Kejin Wang
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| Abstract | ||
| This paper presents the numerical simulation of the rigid 12.6 mm diameter kinetic energy ogive-nosed projectile impact on plain and fiber reinforced concrete (FRC) targets with compressive strengths from 45 to 235 MPa, using a three-dimensional finite element code LS-DYNA. A combined dynamic constitutive model, describing the compressive and tensile damage of concrete, is implemented. A modified Johnson_Holmquist_Cook (MJHC) constitutive relationship and damage model are incorporated to simulate the concrete behavior under compression. A tensile damage model is added to the MJHC model to analyze the dynamic fracture behavior of concrete in tension, due to blast loading. As a consequence, the impact damage in targets made of plain and fiber reinforced concrete with same matrix material under same impact velocities (650 m/s) are obtained. Moreover, the damage distribution of concrete after penetration is procured to compare with the experimental results. Numerical simulations provide a reasonable prediction on concrete damage in both compression and tension. | ||
| Key Words | ||
| concrete; material model; numerical simulation; projectile penetration. | ||
| Address | ||
| Gang Lu: Shaw Stone & Webster Nuclear, Stoughton, MA, USA 02072 Xibing Li: School of Resources and Safety Engineering, Central South University, Changsha, China 410083 Kejin Wang: National Concrete Pavement Center, Iowa State University, Ames, IA, USA 50010 | ||