OBJECTIVE: To engage in a challenging career in the general areas of analytical and computational mechanics and thermodynamics, to contribute in the development of new knowledge and to apply my findings to applications of practical importance.

SUMMARY OF QUALIFICATIONS

• Theoretical and computational methods to characterize large deformation thermo-mechanical response of materials.

• Mechanics at finite deformations: elasticity, plasticity, viscoelasticity, viscoplasticity.

• Computational mechanics: Nonlinear problems (material and geometric), shells for special applications, finite element methods

• Four years experience in development of finite element code and incorporating different large deformation constitutive models using own code as well as in Abaqus.

• Three years experience in Finite Element Analysis (FEA) working with international clientele GE (Oil and Gas, Schenectady, US) and GE (Nuovo Pignone, Italy) for steam turbine and reciprocating compressor components.

• Experience in numerous interdisciplinary finite element simulation projects in the area of nano-imprinting, bridge design, osteoporoses in bone, nano-indentation and food safety.

• Handle multiple projects simultaneously and in a team.

COMPUTER SKILLS

Operating System: Windows.

Computer languages: FORTRAN, C, C-sharp.

Finite Element Software: Ansys, Abaqus, FemLab, Unigraphics.

Other Software: Matlab, Maple, Mathematica, Scientific Workplace, MS Office.

EDUCATION

Dec’2009 Ph.D. (Engineering Mechanics): University of Nebraska Lincoln (CGPA 3.9/4.0)

Thesis: Thermodynamic consistent large deformation constitutive model for glassy polymers.

Advisor: Dr. Mehrdad Negahban.

Dec’2001 M Tech (Applied Mechanics): Indian Institute of Technology, New Delhi, India (CGPA 8.91/10.0, Distinction, Rank first in Applied Mechanics Department)

Thesis: Finite element analysis of temperature and residual stress during welding using ABAQUS.

May’2000 B Tech (Mechanical): HBTI, Kanpur, India (76.72 %, Distinction)

Thesis: NC Cutter Path Generation for Pocket Milling operation using C programming.

PROFESSIONAL EMPLOYMENT

Research and Teaching Assistant Aug 2004- Present

Department of Engineering Mechanics University of Nebraska, Lincoln

• Army Research Lab (ARL) sponsored project: Development of general large deformation thermodynamically consistent constitutive model and used that model to fit the material parameters for glassy polycarbonate.

o Developed theoretical and computational methods to extract material characteristics from novel experimental methods and in the implementation of the characteristics into simulations.

o Developed a nonlinear elastic model generated from tension tests which could predict the normal stresses in shear that are compatible with Torsional Kolsky bar.

o Developed a large deformation initially isotropic elastic plastic constitutive model to construct the developing anisotropy as a result of plastic deformation.

o Developed a new technique to experimentally evaluate the back stress in compression and shear for glassy polymers and modeled a thermodynamically consistent back stress.

• National Bridge Research organization (NaBRO) sponsored project: Development of finite element code which could incorporate small and large deformation nonlinear elastic and elastic plastic analysis and can be used for practical importance. The result of this work, up to this point, has been one accepted refereed journal publication, one submitted and one in preparation.

• Developed a geometrically exact nonlinear Reissner/Mindlin kinematics finite element shell. The formulation developed was

o Robust

o Shows better characteristics comparison to other shell elements.

o Solves the problem with fewer elements, larger load steps and fewer Newton iterations than reported by other shell formulation in the past.

o Incorporates any nonlinear large deformation constitutive model.

• Developed a large deformation prestretch brick and shell element which has a capability to solve a problems with many practical applications. This element was used in particular applications which include

o Creating micro and nanostructure on tubular and spherical surfaces.

o Simple live dead continuous for bridge applications.

• Implemented four parameters large deformation elastic constitutive model that has softening characteristics in Abaqus and compared the model with large deformation elastic plastic model. For monotonic loading, it takes a few load steps and less time to solve a problem using four parameters model.

• Taught statics and Strength of Materials undergraduate level courses and substituted for one third of the Finite element graduate level course.

• Teaching assistant (responsibilities related to grading) for various undergraduate and graduate level courses which includes Finite element method, Advanced Dynamics, Continuum Mechanics, Advanced mechanics of materials and Engineering Statics.

Project Engineer May 2002- July 2004

Quality Engineering and Software Technology (Quest) Private Ltd. Bangalore, India

• Worked on multiple projects for a CAE based company and a leading provider of engineering solutions for advanced technology products in the Aerospace, Automotive, Power generation and Oil & Gas.

• Participated in more than fifty analysis projects for GE (Oil & Gas, Schenectady, US) and GE (Nuovo Pignone, Italy) using modeling, meshing and finite element analysis software.

• Performed analysis including structural analysis, cyclic symmetry modal analysis, transient thermal, sequentially coupled thermal structural analysis and contact analysis for various steam turbine and reciprocating compressor components.

• Performed UG Chunking, Meshing and Analysis using ANSYS and Documentation for some of the projects listed below.

• Mechanical analysis (structural and modal analysis) of steam turbine blades considering power loads and pressure loads at different sections of an aerofoil.

• Stress analysis of HA to HF reciprocating compressor crankshafts by pressure application of three different locations on the crank pins.

• Pre-Stressed modal cyclic symmetry analysis for blades and nozzles using natural frequency and mode shapes and interference diagram to calculate critical node

• Structural analysis for shroud contact analysis using three different load cases which are were spin only, thermal only and combined.

• Sequentially coupled Thermal Structural Analysis of Yong Hong IP-HP Rotor and Shell.

AWARDS AND HONORS

• Topper throughout the educational career.

• Awarded Milton E. Mohr Research Fellowship for achievements and excellence in academics and research, 2006-2007.

• Outstanding graduate teaching award’2008 given by College of Engineering.

• Ralph E. Ekstrom, Ph.D. Excellence in Teaching Award’2008.

• Best research presentation award’2009 given by College of Engineering.

• Teaching Assistant in UNL Engineering study abroad program, Rouen, France, July 2006.

• Graduate and teaching assistantship, University of Nebraska, Lincoln 2004- Till Date.

• Certificate to attend Summer Institute for Teaching Assistants (ITA) training.

• During my work tenure in Quest, I was promoted as a team leader of Reciprocating Compressor Group and worked on more than fifty analysis project during my job.

• Training in Nuovo Pignone (GE’s Oil and Gas), Italy for three months on reciprocating compressors.

• Six Sigma DMAIC (Define, Measure, Analyze, Improve, Control) Green Belt training.

• Held a merit scholarship throughout Masters at IIT, New Delhi, India.

• Held a merit scholarship throughout Bachelors at HBTI, Kanpur, India.

• Recognized as an active contribution in the Executive Committee of the Association of Mechanical Engineers during Bachelor degree.

PUBLICATIONS

• Negahban, M., Goel, A., Dilabarre, P., Feng, R., Dimick, A., “Experimentally evaluating the equilibrium stress in shear of glassy polycarbonate,” Journal of Engineering Materials and Technology, vol. 128, 537-542, 2006.

• Negahban, M., Strabala, K., Dilabarre, P., Goel, A., Feng, R., Grenet, J., “Temperature dependence of the back-stress in shear for glassy polycarbonate,” Macromolecular Symposia, Vol. 258, 142-151, 2007.

• Lima, O., Tan, L., Goel, A., Negahban, M., Li, Z., “Creating Micro- and Nanostructures on Tubular and Spherical Surfaces,” J. Vac. Sci. Technol. B., Vol. 25, 2412-2418.

• Negahban, M., Goel, A., Zhang, L., “Evaluating the development of elastic anisotropic with plastic flow,” Acta Mechanica (Accepted 2008).

• Goel, A., Strabala, K., Negahban, M., Turner, J.A., “Modeling the development of elastic anisotropy with plastic flow for glassy polycarbonate,” Journal of Polymer Science (Accepted).

• Negahban, M., Goel, A., Marchon, P., Azizinamini, A., “Geometrically Exact Nonlinear Reissner/Mindlin Kinematics Shell,” International Journal for Computational Methods in Engineering Science and Mechanics (Accepted)

• Goel, A., Strabala, K., Negahban, M., Feng, R., “Experimentally evaluating equilibrium stress in uniaxial tests,” Experimental Mechanics (Accepted).

CONFERENCE PRESENTATIONS

• Negahban, M., Feng, R., Dilabarre, P., Goel, A., Shen, X., Dimick, A., Waters, A., “Shape Memory as concept in characterizing the monotonic and non-monotonic thermomechanical response of glassy polycarbonate at small and large deformations”, IMECE2005, ASME Congress International Congress, Orlando, November 9-11, 2005.

• Negahban, M., Dilabarre, P., Goel, A., Feng, R.,Grenet, J., “Mapping Equilibrium stress and plastic strain rate in glassy polymers”, 43rd Annual technical meeting of the society of engineering science, Pennsylvania, August 13-16,2006.

• Negahban, M., Goel, A., Dilabarre, P., Feng, R., Grenet, J., “Characterizing the Nonlinear Elastic Response of Polycarbonate”, ASME International Mechanical Engineering Conference and Exposition, Chicago,IL, November 5-10,2006.

• Negahban, M., Goel, A., Strabala, K., Vogeler, J., Feng, R., Delabarre, P., Grenet, J., “Characterizing Polycarbonate under large strains and rapid loading”, Polychar World Forum on Advanced Materials, Buzios, Brazil, April 18-20, 2007.

• Negahban, M., Goel, A., Strabala, K., Vogeler, J., Feng, R., Grenet, J., “Modeling polycarbonate under large strains and rapid loads,” ASME Applied Mechanics and Materials Conference, Austin, Texas, 2007.

• Negahban, M., Goel, A., Vogeler, J., Strabala, K., Feng, R., Delabarre, P., Grenet, J., “Normal Stress, Back Stress, and Plastic Flow in Shear for Polycarbonate,” Shear-07, Nancy, France, September 4-7, 2007.

• Negahban, M., Goel, A., Strabala, K., Oliviera, N., Hein, J., Feng, R., “Large deformation constitutive model for back stress of glassy polycarbonate,” Society of Engineering Science- 45th Annual Technical meeting, Urbana, IL, USA, October 12-15, 2008.

• Negahban, M., Goel, A., Strabala, K., Vogeler, J., Feng, R., “Experimental characterization and constitutive modeling of Polycarbonate under changes of temperature, strain and strain rate,” Polychar World Forum on Advanced Materials, Rouen, France, April 2009.

GRADUATE COURSEWORK

Continuum Mechanics Finite element Methods Applied Elasticity

Applied Plasticity Theory of Plasticity Nonlinear optimization

Advanced fluid mechanics Advanced Dynamics Theory of Plates and Shells

Computer Aided Design Stress Waves in Solids Fracture Mechanics

Viscoelasticity Applied computational methods Composite materials

REFERENCES

References will be available upon request

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