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Project
Ballistic Impact Modeling of Fabrics for New Protective System - Experimental Program and Constitutive Law Development

PI: Mark Horstemeyer
Team Members: Paul Wang, Adrian Pascu


Description:

Mechanical behavior of Nylon 6.6 and Kevlar 29 from yarn to fabric scales under various
strain rates and temperatures is investigated in this project. Stress and strain data of yarns
impregnated with and without shear thickening fluid (STF) are compared, and yarn-to-yarn
friction as a piece of vital information for modeling purpose is quantified Using those
experimental results, a visco-hyperelastic constitutive model is developed to predict the
constitutive behavior of yarns under various loading conditions. We further perform impact tests for both fabrics (Nylon 6.6 and Kevlar 29) with and without STF at room temperature, and use two different types of bullets (caliber 10 mm and 7.62 mm). These impact test results will be used for impact simulations which will not be documented in this project.