The 2010 Winter Semester ME Seminar Series continues with the "Atom to Auto: Microstructure Based Computational Plasticity at Multiscales " seminar by Dr. Raj Mishra. The seminar will be held in the Engineering Hall of Fame on Friday, March 26 from 11am-12pm. Below is an abstract of the seminar and a brief bio of Dr. Mishra.
Abstract:
This talk will present a hierarchical constitutive framework based on a rate-dependent crystal plasticity theory incorporating microstructural parameters and physical mechanisms to simulate large strain deformation phenomena in aluminum and magnesium alloys for automotive applications. Simulations of deformation under various strain paths are performed by incorporating experimental orientation imaging data and mechanical testing data into the model. Computations at lower length scales provide hard-to-measure input parameters for higher length scale simulations. The model is calibrated and validated with suitable experimental measurements at appropriate length scales spanning from in situ nano-indentation inside the TEM to precision strain rate sensitivity measurements on bulk samples. An example of the application of this approach to develop high formability alloys for automotive applications will be discussed.
Short Bio:
Dr. Raj Mishra is currently a Staff Researcher at GM Global R&D Center in Warren, MI. He received his Masters degree in Physics from IIT, Kanpur, India and Ph. D. in Materials Science and Engineering from the University of California Berkeley. Prior to joining GM R&D Center, Dr. Mishra was a staff scientist at the National Center for Electron Microscopy at the Lawrence Berkeley National Laboratory. His research activities have included Nd-Fe-B permanent magnets, aluminum metal matrix composites, wrought Al and Mg alloys and multiscale computational plasticity. Currently Dr. Mishra holds adjunct professorship at McMaster University and the University of Waterloo in Canada.