Ballistic Impact Perforation into GLARE Targets, Part II: Target Optimization

GLARE is a family of laminated hybrid materials that consists of thin aluminum and glass/epoxy layers. Ballistic impact perforation simulation is carried out using LS-DYNA in part I [1]. This part of research extends the FEM model of the previous part [1]. Some GLARE 3/2 laminates with different aluminum thickness is considered. The aluminum thickness varies in frontal, medial and distal layers of GLARE, while the thickness of glass/epoxy layers is constant, and the ballistic limit and absorbed energy of each GLARE targets is determined numerically. Specific absorbed energy (ratio of absorbed energy to areal density) is defined as goal function and should be maximized. The laminate with maximum specific absorbed energy is determined. In addition, energy absorbing portion of each layer is determined. Numerical simulations are compared with some experimental results and the results are commented upon.

Keywords:

GLARE , Ballistic Impact , Finite Elements Method (FEM) , LS-DYNA , Optimization