Date/Time
Date(s) - 04/04/2024
1:55 pm - 2:55 pm
Location
Rhines Hall 125
Categories
Abstract
High strain and high strain-rate applications in aerospace, defense, and automotive industries have led to interest in utilizing the ability of many polymers to withstand extensions to failure of several hundred percent, often without localization or necking, and their strong rate dependence.
A broad range of characterization techniques will be presented for semi-crystalline polymers, including elastic-plastic fracture, split Hopkinson pressure bar, plate impact and Taylor Impact.
Temperature and strain-rate dependence will be reviewed in terms of classic time-temperature superposition and an empirical mapping function for superposition between temperature and strain-rate.
Results from Dynamic-Tensile-Extrusion (Dyn-Ten-Ext), plate impact experiments, neutron and x-ray diffraction will be discussed.
Bio
Eric Brown, Ph.D.
User Facility Director, Los Alamos Neutron Science Center
Los Alamos National Laboratory
Dr. Eric Brown is the Los Alamos Neutron Science Center (LANSCE) User Facility Director and Senior Director in the Physical Sciences Directorate at Los Alamos National Laboratory. His research has spanned fracture and damage of complex heterogeneous polymers and polymer composites for energetic, reactive, and structural applications, including crystalline phase transitions, plasticity, dynamic loading conditions, and self-healing materials.
He has served as the Technical Advisor for the Joint DoD/DOE Munitions Technology Program in the Office of the Under Secretary of Defense, led the Neutron Science and Technology Group in the Physics Division, served as the Division Leader for the Explosive Science and Shock Physics Division leading a wide range of research into high explosive development and application, and been a senior scientist in the Office of Experiment Science at Los Alamos.
He was the founding Editor-in-Chief of the Journal of Dynamic Behavior of Materials. He is the Past President of the Society for Experimental Mechanics and served two terms on the Board of Directors for the Minerals, Metals and Materials Society.
He is a Fellow of the American Physical Society and the Society for Experimental Mechanics. He has received awards for his technical achievements in physics and materials science from the ASC, DOE-NNSA, LANL, MRS, SEM, TMS, and the University of Illinois.
Eric received a B.S. in Mechanical Engineering in 1998 and a Ph.D. in Theoretical and Applied Mechanics in 2003, both from the University of Illinois at Urbana-Champaign.