who.  we.  are. 

Associate Professor


Dr. L is currently in the Mechanical Engineering Department at Colorado School of Mines.  She received her B.S. in Aerospace Engineering and B.A. in Dance Performance as a Shipman Scholar from the University of Michigan, and her M.S. degree in Aerospace Engineering from the Georgia Institute of Technology as a NASA Space Grant fellow with a thesis on thin foil fatigue. Leslie received her Ph.D. from the California Institute of Technology under Prof. Ares Rosakis, researching hypervelocity impact damage as a NASA Aeronautics Scholar and NSF Graduate Research Fellow. A former Lockheed Martin Aeronautics Advanced Development Programs (Skunk Works) engineer, Leslie is a recipient of an NSDEG Graduate Research Fellowship, Zonta International Amelia Earhart Fellowship, and the 2009 Ernest E. Sechler Award from Caltech.  Leslie spent the summer of 2013 at NASA Glenn as a Faculty Fellow, and she is a 2017 ONR Young Investigator and a 2018 NSF CAREER awardee.  



Research Focus:  Soft Foam Characterization and Development for Next-Generation Helmet Liners to Mitigate TBI


Dr. Koumlis received his B.S. in Aeronautical and Mechanical Engineering from the University of Patras, Greece, with a major in structural mechanics and minor in applied mechanics, materials technology and biomechanics.  He received his MSc and PhD in Mechanical Engineering from the University of Southern California in Los Angeles, with a dissertation on an experimental model of blunt-impact induced traumatic brain injuries under Prof. Veronica Eliasson.  He also has expertise in shock mechanics and combustion kinetics.  Stelios is heading the DMML side of a joint ONR project lead by Prof. Christian Franck at U-Wisconsin, Brown University, Sandia National Laboratory and Team Wendy, focusing on dynamic deformation and failure of helmet foam liners for improved head gear and testing methods that address and prevent mild traumatic brain injury (mTBI) and blast related TBI.  

PhD Focus: Understanding Deformation Mechanisms in Highly Oriented MAX Phases across Strain Rates

MS THESIS: Phase Content Influence on the Mechanical Behavior of Group V Transition Heavy Metal Carbides




Current Research Focus:  Dynamic Fracture of Ferroelectric Ceramics

PhD Focus: Repetitive Impact Loading to Simulate Launch and Recovery Cycles for Composite Impulsive Fatigue Performance and Damage Tolerancing 




PhD Focus: Dynamic Inverse Identification leveraging the Virtual Fields Method 

MS THESIS @ NMT, Advisor: Prof. Jamie Kimberley: Dynamic Tensile Failure of Rolled Magnesium


Thesis:  Rate-Dependent Fracture Behavior of Additively Manufactured Polymers

B.S. in Biological Systems Engineering from the University of Wisconsin - Madison.





Former HESS & COOP Undergraduate Research Scholars 

Rochitha Nathan  |   BS Mechanical Engineering Drexel '19|   Impact Dance-Mechanics Intersections COOP |   2018
Jacqueline Tawney  |   BS Mechanical Engineering Drexel '18  |   Biaxial loading device  |   2016
David DiMarco   |   BS Mechanical Engineering Drexel '17  |   MAX phase compression   |       fall 2015
Laura Melizyaev  |  BS Materials Science & Engineering Drexel '16   |  Rochelle salt impact  |    spring 2014 
Robert Keane |  BS Mechanical Engineering Drexel '16   | Kolsky confinement sleeve   |    winter 2014
Robert Liberatore |  BS Mechanical Engineering  Drexel '16   | Kolsky pulse shaping   |     winter 2014
Michael Daily |  BS Mechanical Engineering  Drexel '15   | dynamic piezoelectric ceramics   |    winter 2014

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