EFFECT OF BULLET SHAPE AND H/A RATIO ON BALLISTIC IMPACT BEHAVIOUR OF FRP COMPOSITE PLATE: A NUMERICAL STUDY

Md. Muslim Ansari, Anupam Chakrabarti

Abstract: In this paper, the behaviour of FRP composite plate has been studied under ballistic impact with different shapes of impactor and incidence velocity ranging from 100 m/s to 1000 m/s. Damage behavior of plate, the variation of residual velocity and ballistic limit have been studied with different h/a ratios and nose shapes of impactor. A simplified 3D finite element model for composite plate and impactor with gap interaction and Lagrangian mesh has been presented. Progressive damage based on material stress/strain failure criteria incorporation with shock effect is considered to study the stage wise damage evolution in FRP composite plate due to ballistic impact by conical as well as blunt shaped cylindrical bullet in AUTODYN hydro code. FE models are validated with available literature in terms of numerical values of residual velocity and damage pattern in composite plate and show a close agreement

Keywords: FE model, impactor shapes, progressive damage, h/a ratio, ballistic impact.

DOI: https://doi.org/10.15623/ijret.2015.0425065