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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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