Ballistic protective mechanism of FRC laminates

According to the analysis of deformation and damage model of FRC laminates after ballistic impact,a two phase theoretical penetration model was presented,based on the impulsive dynamics and stress wave propagation analysis,which includes a shear penetration phase and the consecutive penetration phase.The transient trape-(zium) deformation cone model was introduced firstly in this article,and the interaction between projectile and target in the consecutive penetration phase was discussed by this model.The calculation code by V-Fortran was compiled and the calculation results were perfect compared with experimental results.When the initial velocity is 300～(900m/s),the difference is less than 50m/s.The emergence and come-into-being mechanisms of some experimental phenomena,such as trapezium deformation cone, petal breakage on back face and the difference in the damage model between FRC's front and back faces,have been made clear now,and some new ways and rules, which can be in(favor) of improving ballistic resistance capability of FRC,are put forward,such as: reduce the content of matrix and the interlaminate strength or increase the shearing resistance of front layers,etc.