Numerical Simulation of a Multilayer Transparent Composite Panel under Impact


The prevailing material system used for ballistic transparency protection in commercial applications consists of float glass front-face layer, adhesive interlayers and polycarbonate backing layer. In this study, a dynamic finite element model has been developed to simulate the ballistic impact behavior of a multilayer transparent composite panel (float glass/polyurethane adhesive layer/polycarbonate) in LS-DYNA. The ballistic resistance of this system against 7.62 mm caliber armor piercing (AP) ammunition under threat level I (833 m/s) according to NATO Standardization Agreement STANAG 4569 was investigated. The nonlinear material models for float glass, polyurethane adhesive, polycarbonate, and bullet (copper jacket and lead core) were applied to characterize the ballistic behavior during high velocity impact. Finite element analysis results were validated by comparing with experimental findings. A multilayer artificial neural network with back-propagation algorithm was used to optimize the total thickness of transparent ballistic panel while maintaining the safety under threat level I.

Meeting Name

Composites and Advanced Materials Expo 2016, CAMX 2016 (2016: Sep. 26-29, Anaheim, CA)


Mechanical and Aerospace Engineering

Research Center/Lab(s)

Intelligent Systems Center

Keywords and Phrases

Backpropagation; Backpropagation algorithms; Ballistics; Glass; Multilayers; Neural networks; Polycarbonates; Adhesive inter layers; Ballistic impact behavior; Commercial applications; Dynamic finite element model; Multilayer artificial neural networks; Nonlinear material models; Polyurethane adhesives; Transparent composites; Finite element method

Document Type

Article - Conference proceedings

Document Version


File Type





© 2016 The Composites and Advanced Materials Expo (CAMX), All rights reserved.

Publication Date

01 Sep 2016

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