Seminar Friday, January 19, 2018

Raj Prabhu, PhD
Assistant Professor
Department of Agricultural and Biological Engineering
Mississippi State University

Multiscale Modeling of the Mechanical Behavior of the Human Brain under Impact Scenarios and Safety Design Aspects

Currently, design and development of automobiles and human protective gears (helmet, body armor, etc.) are based on test dummies or animal model surrogates, and the injury metrics obtained from thereof. However, dummy or surrogate injury metrics may not accurately capture the human brain’s injuries, specifically, Traumatic Brain Injuries (TBI). Multiscale modeling of the human brain, under various injury scenarios, presents the most ethical and viable way for studying the biomechanics of TBI. This presentation gives a systematic scientific approach for performing multiscale constitutive modeling of the brain coupled with experiments, structural finite element analysis, lower length modeling, and damage structure-property quantification. Next, the TBI biomechanical information, obtained through multiscale modeling and simulation, is used as the design constraints for the simulation-based design and development of human protective gears. Lastly, a novel bio-inspired design, which can be incorporated in a helmet, for stress wave mitigation is presented. This bio-inspired design enables the conversion of impending stress waves into transverse vibrations.