Vikas Tomar

Vikas Tomar

2009 - Associate Professor

Degrees

Ph.D., Georgia Institute of Technology, Atlanta, GA, December 2005
M. Tech., Indian Institute of Technology-Madras, Chennai, India, May 2001
B. Tech., National Institute of Technology, Kurukshetra, India, May 1998

Contact

701 W. Stadium Ave.
West Lafayette, IN 47907-2045

Office: ARMS 3205
Office Phone: 765-494-3423
Office Fax: +1 765 494 0307
Email: vikas.tomar.1@purdue.edu
Webpage: http://www.interfacialmultiphysics.com

Interests

• Microstructure Dependent Fracture and Fatigue Failure of Materials
• Multiscale Simulations of Material Processing
• Multifunctional Materials and Systems
• Bio-inspired and Bio-enabled Materials

MATERIALS:
• High temperature metallic alloys (e.g. W, Ti, 9-12 Cr steels)
• Biological and biomimetic systems (tropocollagen based materials, chitosan based materials) and polymer composites
• Ceramics (SiC based conventional and polymeric systems e.g. SiCN composites, conventional composites e.g. TiB2-Al2O3 composites, bio-ceramics e.g. hydroxyapatite)
• Semiconductors (e.g. Si, Si-Ge, Graphene-Si systems)

Awards and Major Appointments

• Kauffman ELA Award, Purdue University (2013)
• Advisory Editor-Integrated Computational Materials Engineering, Elsevier (2013)
• Editor-in-Chief, International Journal of Experimental and Computational Biomechanics (2013)
• Instruction Matters: Purdue Academic Course Transformation (IMPACT) Program Fellow (2012-13)
• NSF Junior Oberwolfach Fellow, Mechanics of Materials Workshop, The Mathematisches Forschungsinstitut Oberwolfach, Germany (2012)
• Louis Stokes Alliance for Minority Participation(LSAMP)-Indiana Outstanding Mentor Award (2011)
• Elsevier-Materials Science and Engineering-C Young Researcher Award (2010)
• TMS (Mineral, Metals, and Materials Society) Early Career Faculty Fellow-Honorable Mention (2010)
• American Society of Mechanical Engineers (ASME) Materials Division 'Orr' Family Award for excellence in failure of materials research (2010)
• The US-Air Force Office of Scientific Research (AFoSR) Young Investigator Program Award (2009)
•Executive Editor, Journal of Nanomedicine & Nanotechnology (since 2012); Associate Editor, Journal of Mechanical Science and Technology (since 2011); Editorial Board Member, Conference papers in physics and Journal of Multifunctional Composites (since 2013)

Research Areas

Dr. Tomar works in the general area of multiscale simulations and experimentation of material failure with an account of interface, grain, and grain boundary level properties. Research in his groups is sponsored by National Science Foundation, Department of Defense, Department of Energy, and Industry. His group has made contributions in microstructure dependent multiscale modeling of material failure and microstructure design against failure. Dr. Tomar has developed a new experimental paradigm based on performing nanomechanical and micromechanical measurements at ultra-high temperatures in combination with Raman spectroscopy (Published in Journal of Engineering Materials and Technology and Materials Science and Engineering-A, 2010-11, AIP Review of Scientific Instruments, 2014). He is using such experimental advances in combination with a new set of multiscale micromechanical models to analyze microstructure dependent failure of materials with an account of nanoscale to micron scale feature specific properties (e.g. a grain boundary or a grain undergoing phase transformation or uncertainty in material or microstructure representation). The model developments include: (a) a new non-equilibrium Green’s function (NEGF) based formalism to understand interfacial thermal and mechanical properties under the influence of high temperature and extreme environment assisted phase transformation in nanostructured materials (published in J. Europ. Ceram. Soc. 2012 and J applied Physics 2013), (b) a new variant of the cohesive finite element method (CFEM) to analyze microscale failure in composites with an account of stochasticity in material properties (Engineering Fracture Mechanics, 2005); and (c) two different variants of molecular simulation methods (1). hybrid Monte Carlo method-2006 published in Physical Status Solidi-a and Journal of Applied Physics, and (2). equivalent crystal method-2009-10 published in Sanford publishing book, Physical Status Solidi-a and Journal of Nanomechanics and Micromechanics) for speeding up non-equilibrium molecular simulation timescales. Dr. Tomar’s focus is on using the combination of models and experiments for (a) solving complex problems in currently existing systems and for (b) discovering new and unconventional material architectures and designs that offer significant improvement in material properties compared to the conventional ones (with special emphasis on biomimetic materials). Scientifically, the collective focus is on myriad aspects of multihpysical behavior of interfaces in materials that includes electronic, phononic, and lattice translational attributes which ultimately affect defect formation, defect propagation, and microstructure dependent material failure. Material failure attributes of focus are extreme environment failure including ultra-high temperature failure, nuclear radiation damage scenarios, high temperature coupled fluid structure interactions (turbines), hypersonic flights, high temperature high strain rate loadings, or stress corrosion cracking etc.

Dr. Tomar's students continue to win awards at national and international level in this area along with publications in prestigious journals. More information about his work is available at: http://www.interfacialmultiphysics.com (his Lab Website)


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