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The purpose of this study is to analyze the penetration and perforation ofK739 carbon fiber reinforced 7075 aluminum metal matrix composites subject to tungsten projectile impact by using LS-DYNA3D, an explicit three dimensional finite element code. The composites plate was made of three kind of fiber volume fraction, 5%, 10% and 15%. The hemispheric projectile strikes the composites plate at four incident angles, 0, 30, 45 and 60. The impact velocity varies form 500 m/s to 1500 m/s at an interval of 500 m/s. The material model of the Tungsten projectile and aluminum matrix are elastic- plastic- hydrodynamic, and the material model of the carbon fiber reinforcementis orthotropic elastic. From the results, the projectile appears ricochet phenomena at only one of the thirty-six cases, and the projectile penetrates the plate at the others. Analyzing the results, deformations, variation of time history of energies, velocities and forces of the projectile and composites plate are functions of the property of composites plate, incident angle and initial velocity. As the carbon fiber fraction of the composites plate is increased, the stiffness and toughness of the composites are increased. Compared with the results of impact test from previous literatures,the results of the simulations are believable.
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