Polymers Designed for Protection (IMAGE) U.S. Army Research Laboratory Caption The new AIREBO-Morse potentials are used in a simulation to deform and break polyethylene fibrils. Large scale simulations like these will allow us to explore effects of defects and other important variables on the properties of ultra-high molecular weight polyethylene a material of great importance to ballistic protection. Credit US Army photo Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.