Session: 01-07-01: Nonlinear Problems in Aerospace Structures

Paper Number: 105939

105939 - Effect of Curvature on Dynamic Response of Dyneema Composite Panel Under Extreme Loading: A Numerical Study 

Ultra-molecular weight polyethylene (UHMWPE) composites are currently the first choice for protective systems due to their inherent characteristics. These composites are widely used in bulletproof jackets as ceramic backing and enhanced combat helmets (ECH). The ballistic performance of these composites is well studied; however, the blast response of UHMWPE composites has not yet been reported extensively. Numerical analysis is performed to assess the effect of geometric curvature of Dyneema HB26 composite panels under extreme loading conditions for a blast case scenario such as an underbelly blast. Simulations are performed using the multi-material arbitrary lagrangian eulerian (MM-ALE) method implemented in LS-Dyna. A parametric study is conducted for varying curvatures of the composite panel while keeping the thickness constant using a validated finite element framework. The outcomes are analyzed and compared for specific energy absorption as well as the back face deformation (BFD). Such analysis is useful for choosing appropriate curvature for improved performance of critical defense protection systems.

Presenting Author: Devendra Kr. Dubey Indian Institute of Technology Delhi

Presenting Author Biography: NA

Authors:

Vivek Kumar IIT Delhi
Rohit Sankrityayan Indian Institute of Technology Delhi
Anoop Chawla Indian Institute of Technology delhi
Devendra Kr. Dubey Indian Institute of Technology Delhi