High-speed X-ray Visualization of Impact Damage and Failure (20/05/22)
Speaker and Affliation:
Wayne Chen
Reilly Professor of AAE and MSE,
Purdue University, West Lafayette, IN
Biography
Professor Wayne Chen received his Ph.D. in Aeronautics at California Institute of Technology in 1995 under Professor G. Ravichandran. He is currently Reilly Professor of Aeronautics, Astronautics and Materials Engineering, and Professor of Mechanical Engineering (by courtesy) at Purdue University, West Lafayette, IN, USA. His research interests are in dynamic experimental technique development and dynamic material characterization. The research results from his group have been published in a book and over 230 journal articles. He is a Fellow of American Society of Mechanical Engineers, a Fellow of Society for Experimental Mechanics, and an Associate Fellow of American Institute of Aeronautics and Astronautics. His recent awards include Honorary Doctor of Science in Technology from Tampere University in Finland (2017) and Elmer F. Bruhn Award for Excellence in Teaching at Purdue University (2018).
When?
20th May, 2022 (Friday), 06:00 PM (India Standard Time)
Mode
Abstract
For materials in impact applications, the failure processes can be a critical aspect in their impact resistance. Thus, it is desired to track the damage initiation and evolution in real time during the dynamic deformation of the specimens, which was not possible except for a few transparent materials under high-speed imaging. Over the past decade, we integrated the high-speed X-ray imaging capabilities present at the Advanced Photon Source beamline 32 ID-B (Argonne National Laboratory, Argonne, IL, USA) with the high-rate loading offered by the Kolsky compression/tension bar and light gas gun. High-speed X-ray images and X-ray diffraction can be obtained simultaneously. The effectiveness of these new experimental capabilities is verified via impact on various material systems, demonstrating in-situ image analysis inside of the material systems during loading rates commonly encountered in high-rate deformation environments, such as high-speed machining, vehicle collision, and blast/impact.