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Computers and Concrete
  Volume 9, Number 1, January 2012, pages 21-33
DOI: http://dx.doi.org/10.12989/cac.2012.9.1.021
 


A numerical study on the damage of projectile impact on concrete targets
Gang Lu, Xibing Li and Kejin Wang

 
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
 

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