Ajit Kelkar, Ph.D.

Professor & Chairman, Nanoengineering

Phone: 336.285.2864

Fax: 336.500.0115

Email: kelkar@ncat.edu


Dr. Ajit D. Kelkar is a Professor and Chair of Nanoengineering Department at Joint School of Nanoscience and Nanoengineering. For the past twenty five years he has been working in the area of performance evaluation and modeling of polymeric composites and ceramic matrix composites. He has worked with several federal laboratories in the area of fatigue, impact and finite element modeling of woven composites including US Army, US Air force, NASA-Langley Research Center, National science Foundation, Office of Naval Research, FAA and Oak Ridge National Laboratory. His expertise are in the area of low cost fabrication and processing of woven composites using VARTM process, fatigue and impact testing of composites, analytical modeling of woven composites. Presently he is involved in the development of nano engineered multifunctional materials using CNTs, BNNTs and electro spun fiber materials, nanoengineered radiation shielding materials. He has published over two hundred fifty papers in these areas. In addition he has edited two books in the area of Nanoscience and Nanoengineering. He has two patents in the area of composite manufacturing. He has received numerous awards including Senior Researcher Award, Intellectual Property Award at North Carolina A&T State University. He is Fellow of Maharashtra Academy of Science, India. He serves on editorial board for three journals in nanotechnology areas. He is member of several professional societies including ASME, SAMPE, AIAA, ASM, and ASEE.

Research Interests

Nanocomposites, Atomistic Modeling , Nano Engineered Materials,  Eletrospinning, Molecular Dynamic Simulations, Nanotechnology, Multifunctional Materials, Crashworthiness, Low Cost Composite Manufacturing  (VARTM Processing), Mechanical Characterization of Materials including Metals, Polymeric Composites (Tape and Textile), Ceramics and Ceramic Composites, Computer Aided Design and Modeling, Finite Element and Finite Difference Modeling, Numerical Analysis, Fatigue and Impact Modeling and Testing of Polymeric Composites, Ceramic Composites, Textile Composites, Micromechanics Modeling and Testing, Single Fiber Modeling and Testing.

Selected Publications

Books:
  • “Nanoengineering of Structural, Functional and Smart Materials”, Mark J Schulz, Ajit D Kelkar and Mannur J Sundaresan, Cat. #: 1653, ISBN: 0849316537, 2005, CRC Press, 712 pages
  • “Nanoscience and Nanoengineering: Advances and Applications”, Ajit D. Kelkar, Daniel Herr and James Ryan, CRC Press, ISBN: 978-1-4822-3119—9, 350 Pages
Book Chapters:
  • Electrospun polyacrylonitrile nanofibers surface-functionalized with amidoxime groups and their applications. Chapter 4 in Nanofibers: Synthesis, Properties, and Applications, Zhang, L; Kelkar, A; Zhu, Z; Fong, H. Nova Science Publishers Inc.: Hauppauge NY, ISBN is 978-1-62257-085-0, , 2012, pages 91-110
  • Processing, Evaluation and Molecular Simulations in Hybrid Polymer Nanocomposites,” Developments in Nanocomposites, Mohan, O. Akinyede, A. Kelkar, and J. Sankar, Research Publishing Services, Singapore, ISBN 978-981-08-3711-2
  • Modeling at Nanoscale – Material Chemistry Level Modeling in Processing and Mechanics of Engineered Materials,” Mohan and A. Kelkar, “Nanoscience and Nanoengineering: Advances and Applications”, Taylor & Francis, ISBN: 978-1-4822-3119—9 .
  • “Computational Modeling of Nano-Bio Interfaces,  Srinivas, R. Mohan, A. Kelkar,” Nanoscience and Nanoengineering: Advances and Applications”, Taylor & Francis, ISBN: 978-1-4822-3119—9
  • Processing, Evaluation and Molecular Simulations in Hybrid Fiber Polymer Composites with Alumina Nanoparticles, Developments in Nanocomposites, R. Mohan Ajit D. Kelkar, Research Publishing Services, Singapore, ISBN 978-981-08-3711-2, 2010.
  • Chapter 19: Continuum and Atomistic Modeling of Thin Films Subjected to Nanoindentation, J.D. Schall, D.W. Brenner, Ajit D. Kelkar, and R. Gupta, “Nanoengineering of Structural, Functional and Smart Materials”, Cat. #: 1653, ISBN: 0849316537, 2005, CRC Press, 712 pages
  • Chapter 20: Synthesis, Optimization and Characterization of AlN-TiN Thin Film Heterostructures, C.Waters, S.Yarmolenko, J.Sankar, S. Neralla, and Ajit D. Kelkar, “Nanoengineering of Structural, Functional and Smart Materials”, Cat. #: 1653, ISBN: 0849316537, 2005, CRC Press, 712 pages
Journal Articles:
  • Galehdari, N. A., Mani, V., Kelkar, A. D. (2016). Fabrication of Nanoengineered Radiation Shielding Multifunctional Polymeric Sandwich Composites. World Academy of Science, Engineering and Technology, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering, 10(3), 274–277, 2016
  • Sirelkhatim, N., LaJeunesse, D., Kelkar, A. D., Zhang, L. (2015). Antifungal activity of amidoxime surface functionalized electrospun polyacrylonitrile nanofibers. Materials Letters, 141, 217–220.
  • Ghazizadeh, M., Estevez, J. E., Kelkar, A. D. (2015). Boron Nitride Nanotubes for Space Radiation Shielding. Int J Nano Stud Technol, 4, 1–2.
  • Aboagye, A., Elbohy, H., Kelkar, A. D., Qiao, Q., Zai, J., Qian, X., Zhang, L. (2015). Electrospun carbon nanofibers with surface-attached platinum nanoparticles as cost-effective and efficient counter electrode for dye-sensitized solar cells. Nano Energy, 11, 550–556.
  • TOMAR, R. P. S., GHAZIZADEH, M., MARTIN, E. H., Kelkar, A. D. (2015). Low Velocity Impact Response of Bio-inspired Fiberglass Woven Composites. American Society of Composites-30th Technical Conference.
  • Mohan, R. V., Purohit, Y., Kelkar, A. D. (2015). Mechanical Behavior of Nanoscale Multilayer Metallic Composites-Dynamic Crack Propagation in Nanoscale Ni–Al Bilayer Composite. Journal of Computational and Theoretical Nanoscience, 12(1), 60–69.
  • Ghazizadeh, J. E. Estevez, A. D. Kelkar, Boron Nitride Nanotubes for Space Radiation Shielding International Journal of Nano Studies & Technology (IJNST), ISSN:2167-868, 2015
  • HVARTM, US Patent Number 9,114,576, Ronnie L. Bolick, Ajit D. Kelkar, 2015
  • Estevez, M. Ghazizadeh, A.D. Kelkar, “Property Prediction of Single Walled Boron Nitride Nanotubes using MD/QM Simulation”, AIAA, Boston, MA, March 2013
  • Estevez, M. Ghazizadeh, J. Ryan, Ajit D. Kelkar, “Simulation of Hydrogenated Boron Nitride Nanotube’s Mechanical Properties for Radiation Shielding Applications”, World Academy of Science, Engineering and Technology, International Science Index 85, International Journal of Chemical, Materials Science and Engineering, 2014, 8(1), 63 - 67.
  • Zhang, Lifeng; Aboagye, Alex; Kelkar, Ajit D.; Lai, Chuilin; Fong, Hao. A review: carbon nanofibers from electrospun polyacrylonitrile and their applications. Journal of Materials Science, 2014, 49: 463-480.
  • Zhang, Lifeng; Aboagye, Alex; Kelkar, Ajit; Lai, Chuilin; Fong, Hao. A review: carbon nanofibers from electrospun polyacrylonitrile and their applications. Journal of Materials Science, 2014, 49: 463-480.
  • Ghazizadeh, J. Estevez, Ajit D. Kelkar, J. Ryan, “Mechanical Properties Prediction of Hydrogenated Boron Nitride Nanotube’s Using Molecular Dynamic Simulations”, JSM Nanotechnol Nanomed, 2014, 2(2): 1030
  • Mohan, Y. Purohit, A. Kelkar, “Mechanical Behavior of Nanoscale Multilayer Metallic Composites – Dynamic Crack Propagation in Nanoscale Ni-Al Bilayer Composite,” Journal of Computational and Theoretical Nanoscience, Accepted, December 2013.
  • Ajit D. Kelkar, Ram Mohan, Mahdi Ghazizadeh and Evan Kimbro, “Progressive Failure Analysis Of Hybrid Composite Laminates Under Static Tensile Loading”, Journal of International Scientific Publications: Materials, Methods and Technologies, Volume7,Part 1, ISSN1313-2539,2013
  • Kelkar, R. Mohan, H. Shiferaw, A. Kelkar, “Statistical Analysis of Uncertainties in Deterministic Computational Modeling – Application to Composite Process Resin Infusion Flow Modeling,” Communications in Statistics – Simulation and Computation, Accepted, In Print, December 2013.
  • Zhang, Lifeng; Aboagye, Alex; Kelkar, Ajit; Lai, Chuilin; Fong, Hao. A review: carbon nanofibers from electrospun polyacrylonitrile and their applications. Journal of Materials Science, 2014, 49: 463-480.
  • Srinivas, R. Mohan, A. Kelkar, “Polymer Micelle Assisted Transport and Delivery of Model Hydrophilic Drug Components into a Lipid Vesicle: A Coarse Grain Simulation Study, J. Phy. Chemistry B, Vol. 117, No. 40, 2013.
  • Rhinehardt, R. Mohan, G. Srinivias, A. Kelkar, “Computational Modeling of Peptide – Aptamer Binding in Biosensor Applications,” International Journal of Bioscience, Biochemistry, and Bioinformatics, Vol. 3, No. 6, 2013.
  • Bob Skillen and Ajit D. Kelkar, “Processing bi-angle non-crimp fabrics”, JEC Composites, Volume 68, October 2011
  • N. Patankar, Ram Mohan, Ajit D. Kelkar, and Ranji Vaidyanathan “Processing and characterization of epoxy resin dispersed with multi walled carbon nanotube (MWNT) derived from camphor”,  Materials Science and Engineering: A, Volume 529, 25 November 2011, Pages 253–256
  • Elvis G. Fefey, Ram Mohan and Ajit D. Kelkar, “Computational study of the effect of carbon vacancy defects on the Young's modulus of (6, 6) single wall carbon nanotube”, Materials Science and Engineering: B, Volume 176, Issue 9, 25 May 2011, Pages 693–700
  • Gautam S. Chandekar, Bhushan S. Thatte, and Ajit D. Kelkar, “On the Behavior of Fiberglass Epoxy Composites under Low Velocity Impact Loading,” Advances in Mechanical Engineering, vol. 2010, Article ID 621406, 11 pages, 2010. doi:10.1155/2010/621406
  • Ajit D. Kelkar, R.V. Mohan, R.L. Bolick, S. M. Shendokar, “Effect of Nanoparticles and Nanofibers on Mode I Fracture Toughness of Fiber Glass Reinforced Polymeric Matrix Composites,” Materials Science and Engineering B, Vol. 168, (2010), pp. 85–89
  • Akinyede, R. Mohan, Ajit D. Kelkar, J. Sankar, Processing and Thermo-Physical Characterization of Alumina Particulate Reinforced 3-Phase Hybrid Composite Material System, Journal of Advanced Materials, 2010, vol. 42, number 3, pp. 5-19
  • Jitendra S. Tate, Ajit D. Kelkar, and Vinaya A. Kelkar; “Minimizing scatter in load-controlled fatigue test data of textile polymeric composites using statistical techniques”, Journal of Interdisciplinary Mathematics, vol. 12 (2009), No. 2, April 09 p283-292
  • Mall, D.W. Katwyk, R.L. Bolick, Ajit D. Kelkar, D.C. Davis, “Tension–compression fatigue behavior of a H-VARTM manufactured unnotched and notched carbon/epoxy composite”, Composite Structures, 90, September 2009, p. 201-207
  • Akinyede, R. Mohan, Ajit D. Kelkar, J. Sankar, Static and Fatigue Behavior of Epoxy/Fiberglass Composites Hybridized with Alumina Nanoparticles, Journal of Composite Materials, Vol. 43, No. 7, pp. 769-781, 2009
  • Ajit D. Kelkar, Ram Mohan, Ronnie Bolick and Sachin Shendokar; “Effect of electrospun nano fibers on the interlaminar properties of woven composites”, Advanced Materials Research Vols. 47-50 (2008) Pp 1031-1034
  • Jitendra S. Tate and Ajit D. Kelkar; Stiffness degradation model for biaxial braided composites under fatigue loading, Composites Part B: EngineeringVolume 39, Issue 3April 2008, Pages 548-555
  • Xiaodong Tang, John D. Whitcomb, Ajit Kelkar and Jitendra Tate, Progressive failure analysis of 2 × 2 braided composites exhibiting multiscale heterogeneity, Composites Science and TechnologyVolume 66, Issue 14November 2006Pages 2580-2590
  • Ajit D. Kelkar, Jitendra S. Tate, and Ronnie Bolick; Structural integrity of aerospace textile composites under fatigue loading, Materials Science and Engineering: BVolume 132, Issues 1-225 July 2006Pages 79-84
  • Ajit D. Kelkar, Jitendra S. Tate, and Pramod Chaphalkar; Performance evaluation of VARTM manufactured textile composites for the aerospace and defense applications, Materials Science and Engineering: BVolume 132, Issues 1-225 July 2006Pages 126-128
  • Jitendra S. Tate Ajit D. Kelkar, and John D. Whitcomb; “Effect of braid angle on fatigue performance of biaxial braided composites” International Journal of FatigueVolume 28, Issue 10October 2006Pages 1239-1247
  • Tang, X., Whitcomb, J., Ajit D. Kelkar and Tate, J.: “Progressive Failure Analysis of 2x2 Braided Composites Exhibiting Multiscale Heterogeneity, Journal of Composites Science & Technology, April
  • Ajit D. Kelkar and Jitendra S. Tate; “Low Cost Manufacturing of Textile Composite Using VARTM Process”, International Journal of Manufacturing Technology and Research, vol. 1, July 2004
  • Pramod Chaphalkar and Ajit D. Kelkar, "Classical Laminate Theory Model for Twill Weave Fabric Composites", Journal of Composites Part A: Applied Science and Engineering 32 August 2001.
  • Ajit D. Kelkar, Stevenson, P. E., Skochdopole, T. R., and Yarmolenko, S. N., “Effects of Gage Length and Test Speed on the Tensile Properties of Geosynthetic Reinforcements,” Grips, Clamps, Clamping Techniques, and Strain Measurement for Testing of Geosynthetics, ASTM STP 1379, Stevenson and S. R. Allen, Eds. American Society for Testing and Materials, West Conshohocken, PA, 2000.
  • Wei, J. Sankar, Ajit D. Kelkar, J. Narayan, “Microstructure evolution accompanying high temperature; uniaxial tensile creep of self-reinforced silicon nitride ceramics”, Journal of Material Science and Engineering A, 272, 1999.
  • Wei, J. Sankar, Ajit D. Kelkar, J. Narayan, “ Mechanical properties of diamond-like carbon composite thin films prepared by pulsed laser deposition”, Journal of Composites: Part B, Engineering, 30, 675, 1999.
  • Chaphalkar Pramod, Ajit D. Kelkar, and Sankar. J, “Analytical Modeling of Structural Woven Composite Members”, Journal of Mathematical Modeling and Scientific Computing, Vol. 8, ISSN 1067-0688, 1997
  • Ajit D. Kelkar, Sankar, Subodh P., and Pai, D. , "Finite Element Analysis of Biaxially Loaded Composite Laminates With A Central Hole", Journal of Mathematical Modeling and Scientific Computing, Volume 6, 1996
  • Ajit D. Kelkar, Chaphalkar, Pramod, and Sankar, J., " Nonlinear Deformations of a Rectangular Plate Using Plate-Membrane Coupling Model with Finite Difference Method", Journal of Mathematical Modeling and Scientific Computing, Volume 6, 1996
  • Dandy, LeRay T., Ajit D. Kelkar and Sandhu, R. S. "Analysis of Progressive Damage in Thin and Thick Composite Laminates Subjected to Low Velocity Impact Loadings," Journal of Mathematical Modeling and Scientific Computing, Volume 4, October 1995.
  • Crawford, Dwayne, Ajit D. Kelkar and Ahrens, Stuart , "Finite Element Analysis of NASA Gas Payload, " Journal of Mathematical Modeling and Scientific Computing, Volume 4, October 1995.
  • Ajit D. Kelkar and Pai, D.M., "Finite Element and Finite Difference Analysis of The Nonlinear Flexure of a Cantilever Beam,” Journal of Mathematical Modeling and Scientific Computing, Principia Scientia, ISSN 1067-0688, Volume 2, pp. 1159-1164, 1993.
  • Workman, F. W., D'Costa, J., and Ajit D. Kelkar, "Nonlinear Deformations of Clamped Annular Membranes Subjected to Uniformly Distribute Axisymmetric Loading," Journal of Mathematical and Computer Modeling, Vol. 11, 1988, pp. 1028‑1034.
  • Ajit D. Kelkar. Elber, W., and Raju, I. S., "Large Deflection Behavior of Circular Quasi‑Isotropic Laminates Under Point Loading," AIAA Journal, Vol. 25, No. 1, 1987, pp. 99‑106.
  • Ajit D. Kelkar, Elber, W., and Raju, I.S., "Large Deflections of Circular Isotropic Membranes Subjected to Arbitrary Axisymmetric Loading, " Journal of Computers and Structures, Vol. 21, 1985, pp. 413‑421.

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Patents

  • H-VARTM Processing, Ronnie Bolick and Ajit D. Kelkar, April 2007, Application number: 12/361,224
Publication number: US 2009/0189320 A1
  • Electrospun Fibers for improving Interlaminar Strength, Ronnie Bolick, Sachin Shendokar and Ajit D. Kelkar, May 2009

Grants

  • High Performance Computing and Enabling Technologies for Nano and Bio Systems and Interfaces, DOD Army Research Office, $1,104,793, May 1, 2011-September 30, 2014, Ajit D. Kelkar (PI) and Ram Mohan (Co-PI)
  • Nano to Continuum Multi-Scale Modeling Techniques and Analysis for Cementitious Materials under Dynamic Loading, Partnership in Research Transition Program, Army Research Office, $3,000,000, 06/2011 – 05/2016, Ram Mohan (PI) and Ajit D. Kelkar (Co-PI)
  • Add-on Supplementary Proposal for the Investigation of High Performance Materials, DOD Army Research Office, $170,000, 02/2013 – 05/2016, Mohan, R. (Lead PI), Kelkar (Co-PI)
  • Computational Modeling and HPC in Advanced Materials Processing, Synthesis and Design, Office of Naval Research, 04/2009 – 06/2012, $1,156,000 Mohan, R. (Lead PI), Kelkar (Co-PI)
  • Efficient Computational Methodologies and Enabling Technologies for Large Scale High Performance Composite Process Modeling, $25,000, Clarkson Aerospace, 01/12 – 08/12, Mohan, R. (Lead PI), Kelkar (Co-PI)
  • Integrating NASA Science, Technology and Research in Undergraduate Curriculum and Training (INSTRUCT), NASA Kennedy Space Center, $1,048573, 01/10-03/14, Ajit D. Kelkar(PI)
Office Hours

By Appointment

Education

  • Ph.D., Mechanical Engineering, Old Dominion University, Norfolk, Virginia, 1985
  • M.S., Mechanical Engineering, South Dakota State University, South Dakota, 1981
  • B.S., Mechanical Engineering, Poona University, Poona, India, 1975