NUMERICAL SIMULATION AND ANALYSIS OF GFRP IMPACTED BY 9X19MM CALIBER BULLET WITH RIGID AND DEFORMABLE MODEL

• Main Author: Muhammad, Fachri
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/62519
• Institution: Institut Teknologi Bandung

This research studied about numerical simulation of GFRP composite which loaded with ballistic impact from 9x19mm caliber bullet according to the bullet specification of PINDAD MU1_TJ. The bullet is modelled by using both rigid and deformable material to study the effects of both models to the results of finite element analysis. Rigid model is easier to be modelled and cut off the burden for computation. This is done by the assumption that the bullet does not undergo heavy deformation. Deformable model especially model which define the jacket and core structure as different structure demand heavier computational capabilities. This type of modelling also requires more detail parameters to be defined. GFRP material is one of the composites which is popular besides Kevlar and CFRP. GFRP has the highest toughness value, the second best in specific energy absorption, and the least expensive among other two materials. According to this study, 9x19mm caliber bullet still fully penetrate GFRP with thickness of 32 mm. The amount of energy absorption is increased as the thickness of the GFRP is increased. The amount of absorbed energy is different between the rigid and deformable model. The energy from rigid projectile is absorbed fewer than the deformable model. The difference of the residual impact reached 84.92% at the thickness of 32 mm. Parametric study of DFAIL is done successfully. DFAILC and DFAILS do not have big effect on the simulation results, but DFAILM and DFAILT effect is considerable especially if the value is increased.