Rapid Penetration into Granular Media

Magued Iskander, PhD, PE, F.ASCE, is a Professor of Geotechnical and Chair of the Civil and Urban Engineering Department at New York University Polytechnic School of Engineering. He is widely recognized as the leading authority on physical modeling of geotechnical applications using transparent soils. ProfessorIskander served as Principal Investigator (PI) and Co-PI on over $12 Million of research and educational grants and contracts, including the NSF CAREER Award. He is a Fellow of The American Society of Civil Engineers (ASCE). Dr. Iskander authored 4 books, edited 10 books, and published over 150 papers. He graduated 9 doctoral and 31 masters’ students. Stephan Bless, ScD, F.APS, F.IBS, is a Research Professor in the Department of Civil and Urban Engineering at New York University Polytechnic School ofEngineering. Before joining NYU he was Head of the Hypervelocity Effects Division at the University of Texas Institute for Advanced Technology. He is an expert in impact effects and the dynamic behavior of materials, with extensive publications in shock physics, terminal ballistics, and strength of materials. He is a Fellow of the American Physical Society and the International Ballistics Society. He can be reached at sbless@nyu.edu. Mehdi Omidvar, PhD, is an Assistant Professor in the Civil and Environmental Engineering Department at Manhattan College. He received his PhD from New York University, where he studied the macro and micro scale behavior of natural and artificial sands to rapid penetration. He has published over 30 articles dealing with granular mechanics, soil dynamics, and nonlinear dynamics.

• IntroductionBehavior of Granular Media Under High Strain-Rate LoadingMicromechanical Behavior of Sand Learned from Multiscale Kolsky Bar ExperimentsHigh-Speed Penetration of Granular GeomaterialsGlobal Observations & Post Mortem Analysis of Penetration in SandIn Situ Characterization of Projectile Penetration into SandThe Use of Digital Speckle Radiography to Investigate the Internal Flow Fields During the Ballistic Penetration of SandMultimodal Radiation Based Tomography and Diffraction of Granular Materials Using Neutrons and Photons and Instrumented Penetration MechanicsGrain-Scale Measurements During Low Velocity Impact in Granular MediaGranular Impact: A Grain-scale ApproachRefractive Index Matching: Microstructure Evolution During Impact Using Refractive Index-Matched Granular MatterMesoscale Observations of Dynamic Penetration in Granular Media Using Transparent SoilsSummary and Conclusions