Failure mechanisms of Ti-Al3Ti metal-intermetallic laminate composites under high-speed impact

Abstract:

In this work, the penetration process of Ti-Al3Ti metal-intermetallic laminate composites impacted by a projectile was numerically investigated. The ballistic performance, stress distribution, failure and energy absorbing mechanisms of Ti-Al3Ti metal-intermetallic laminate composites under high-speed impact were examined in detail. The results shown that Ti-Al3Ti metal-intermetallic laminate composites under high-speed impact was mostly under tensile stress, since the compressive wave was reflected back as a tensile wave. During projectile penetration, transverse, inclined, and vertical cracks formed in the Al3Ti phase, which can dramatically absorb the kinetic energy of projectile.

Key words:metal-intermetallic laminate composites; finite element method; high-speed impact; failure