Ph.D., Solid Mechanics, Oklahoma State University, Stillwater, 2008
M.S., Solid Mechanics, Oklahoma State University, Stillwater, 2004
B.E., Mechanical Engineering, University of Pune, India, 2002
Experience
Postdoctoral Fellow, The Johns Hopkins University - Computational and theoretical modeling of nanostructured materials
Research Assistant, Oklahoma State University, 2003-2008 - Nanoindentation for characterization of mechanical properties of materials - Low strain-rate mechanical characterization of materials - Modeling using Material Point Method Teaching Assistant, Oklahoma State University, 2003-2008
Modeling mechanical behavior of materials at very high strain-rates
Dynamic failure
Application of material point method to modeling problems in biomechanics
Awards and Honors
Best Poster Award, Research Week, Oklahoma State University, 2007
Scholars program award National Science Foundation, OK EPSCoR, 2005
Merit scholarship University of Pune, India, 1998-2002
Best out-going all-round student performance award, Mechanical Engineering, College of Engineering & Technology, University of Pune, India, 2002
Best paper presentation award Society of Automotive Engineers, India, 2001
Professional Association
Member – American Society of Mechanical Engineers (ASME)
Member – Society of Engineering Sciences, Society of Experimental Mechanics
Elected Member Phi Kappa Phi Collegiate honorary society
Sigma Gamma Tau Collegiate aerospace engineering honorary society
Publications
Daphalapurkar, N.P., Lu, H., Komanduri, R. “Measurement of mechanical properties of sand grains using nanoindentation,” Mechanics of Materials (2009) (in review)
Cao, B.,Li, B., Daphalapurkar, N.P., Ramesh, K.T., Ma, E. “High strain-rate shearing and deformation twinning in nanocrystalline aluminum films,” (submitted to Acta Materialia, 2009)
Daphalapurkar, N.P., Ramesh, K.T. “Extended dislocation widths in face-centered cubic metals,” (Submitted to Applied Physics Letters, 2009)
Daphalapurkar, N.P., Dai, C., Gan, R., Lu, H., “Characterization of the linearly viscoelastic behavior of human tympanic membrane by nanoindentation,” Journal of Mechanical Behavior of Biomedical materials, 2 82-92 (2008).
Lu, H., Fu, B., Daphalapurkar, N., Hanan, J., Sotiriou-Leventis, C., Leventis, N. “Simulation of the Evolution of the Nanostructure of Crosslinked Silica-Aerogels Under Compression,” Polymer Preprints Vol 49(2), 2008: 564-565.
Daphalapurkar, N.P., Hanan, J.C., Phelps, N.B., Bale, H., Lu, H. “Tomography and simulation of microstructure evolution of a closed-cell polymer foam in compression,” Mechanics of Advanced Materials and Structure, 15, 594-611 (2008)
Huang, G., Daphalapurkar, N.P., Gan, R., Lu, H. “A method for measuring linearly viscoelastic properties of human tympanic membrane using nanoindentation,” ASME Journal of Bioengineering, 130, 014501 1-7 (2007)
Daphalapurkar, N.P., Lu, H., Coker, D., Komanduri, R. “Simulation of dynamic crack growth using generalized interpolation material point (GIMP) method,” International Journal of Fracture Mechanics, 143, 79-102 (2007)
Lu, H., Daphalapurkar, N.P., Wang, B., Roy, S., Komanduri, R. “Multiscale simulation from atomistic to continuum – Coupling molecular dynamics (MD) with the material point method (MPM),” Philosophical Magazine A, 86(20), 2971-94 (2005)
Conference Presentations
Daphalapurkar, N.P., Ramesh, K.T., Levy, S., Molinari, J.-F., Graham-Brady, L. "Predicting variability of the failure strength in materials with pre-existing defects through computational modeling," US National Congress on Computational Mechanics (2009)
Daphalapurkar, N.P., Ramesh, K.T., "Simulation of dynamic problems in solid mechanics using material point method," Johns Hopkins University, Solids Seminar (2008)
Daphalapurkar, N.P., Lu, H., “Direct comparison of 3D microstructure evolution of a closed-cell foam under compaction from µ-CT and simulations,” Society of Experimental Mechanics (2008)
Daphalapurkar, N.P., Lu, H. “Simulation of closed-cell polymeric foam under compression,” Mechanics of Time-dependent Materials conference (2008)
Daphalapurkar, N.P., Lu, H., Hanan, J., Phelps, N., Bale, H., “Experiment and simulation of compression in foam through direct observation of 3D Microstructure,” ASME Applied Mechanics and Materials, McMAT conference (2007)
Daphalapurkar, N.P., Lu, H., “Modeling and simulation of silica aerogels using Generalized Interpolation Material Point Method,” 3rd Material Point Method Workshop, Sandia National Laboratory (2007)
Daphalapurkar, N.P., Lu, H., Coker, D., “Modeling of self-similar crack propagation using Generalized Interpolation Material Point Method,” 3rd Material Point Method Workshop, Sandia National Laboratory (2007)
Daphalapurkar, N.P., Lu, H., Coker, D., Komanduri, R., “Simulation of dynamic crack growth using generalized interpolation material point method,” 26th Oklahoma AIAA/ASME symposium (2006); 2nd MPM Workshop, Oklahoma State University (2006); ASME Applied Mechanics and Materials, McMAT conference (2007)
Daphalapurkar, N.P., Huang, G., Gan, R., Lu, H., “Measurement of linear viscoelastic properties of human tympanic membrane using nanoindentation,” 27th Oklahoma AIAA/ASME symposium (2007)
Lu, H., Daphalapurkar, N.P., Roy, S., Komanduri, R., “Multiscale simulation from atomistic to continuum – Coupling molecular dynamics (MD) with the material point method (MPM),” International Conference on Multiscale Materials Modeling (2004); Society of Engineering Sciences Conference (2004); 1st Material Point Method Workshop (2005) University of Utah.
Representative for Mechanical and Aerospace Engineering in Graduate and professional student government association, Oklahoma State Uiversity (OSU), 2006-07
Executive committee member of an International Students Association, OSU, 2006-07
Executive committee member of Research Week, OSU, 2007
Sketch
During his graduate studies, he had opportunities to learn from mentors with a wide area of expertise, Computational Solid Mechanics, Biomechanics, Experimental Mechanics, Materials Processing, and Manufacturing. His mentors have been Profs. Hongbing Lu, Ranga Komanduri, Samit Roy, Jay Hanan, Demir Coker, and Rong Gan.
Currently he is a Postdoctoral Fellow at Johns Hopkins University, in Department of Mechanical Engineering since September 2008. His work deals with Computational and Theoretical modeling of Nanostructured Materials under the guidance of Prof. K.T. Ramesh and funded by ARL.
Over his research curriculum in US, he has been supported by grants under AFOSR, NSF, NIH, ARL and scholarships from NSF OK EPSCoR.
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