PROGRESSIVE DAMAGE MODELING OF 3D WOVEN FIBER COMPOSITES UNDER BALLISTIC LOADING

摘要

In this paper, a micromechanics based rate sensitive progressive damage model is presented for3D woven fiber composites which are finding increased use in lightweight soft armorapplications. The matrix is modeled using a recently developed Mulliken-Boyce viscoplasticmodel and the glass fibers are treated as anisotropic linear elastic materials. Fiber debonding isconsidered in the model and the implications of this advanced progressive damage model onprojectile resistance are analyzed. Two distinct response regimes in the projectile velocityprofile within the composite material were observed - an initial rapid deceleration of theprojectile due to inertial resistance from the composite followed by more gradual slow down dueto elastic and inelastic structural resistance. We also observed a cone shaped damage zone whichrapidly formed a plug in the through thickness direction adding further inertial resistance to thehigh speed projectile. The model has been incorporated as a user subroutine inABAQUS/Explicit finite element code.