Mehrdad Negahban

Mehrdad Negahban 

Mehrdad Negahban
Contact Information:
W311 NH
Lincoln: City Campus
(402) 472-2397
mnegahban@unl.edu
Email   
Personal Links:

Professor and U.S. Director of Advanced Mechanics and Materials Engineering International Laboratory (AMME-International)
  • Ph.D. (1988): University of Michigan, Applied Mechanics, Ann Arbor, Michigan
  • M.S.E. (1984): University of Michigan, Applied Mechanics, Ann Arbor, Michigan
  • B.S. (1982): Iowa State University of Science and Technology, Mechanical Engineering, Ames, Iowa

Areas of Research and Professional Interest
  • Theoretical, computational, and experimental studies to characterize large deformation thermo-mechanical response of materials, in particular polymers.
  • Simulation of the effects of crystallization on the mechanical behavior of polymers under large deformations.
  • The study of the effects of crystallization on failure and the redistribution of stress in polymer matrix composites. Simulation of the manufacturing of thin film extruded polymers.
  • Experimental investigation and theoretical modeling of large plastic forming and shape recovery in amorphous polymers.
  • 3D printing with stereo lithography: Controlling property variation and optimizing property distribution.

Courses Taught


Experience

Recent Graduates:
  • Lili Zhang, Ph.D., "Propogation of thermo-mechanical waves in deforming nonlinear viscoelastic bodies," University of Nebraska-Lincoln, Lincoln, Nebraska, August, 2013.
  • Lena Butterfield (with Li Tan), M.S., "Developing and characterizing a rapid prototyping stereo-lithography machine to produce interpenetrating polymer network systems," University of Nebraska-Lincoln, Lincoln, Nebraska, August, 2013.
  • Emilie Bobo, M.S., "Development of a controllable polymer system using interpenetrating networks," University of Nebraska-Lincoln, Lincoln, Nebraska, August, 2013.
  • Jonathan M. Hein, M.S., "Ultrasonic and stereo-optical characterization techniques for applications in mechanical testing," University of Nebraska-Lincoln, Lincoln, Nebraska, December, 2011.
  • Ke Yu, M.S., "Generic strategies to implement material grading in finite element methods for isotropic and anisotropic materials," University of Nebraska-Lincoln, Lincoln, Nebraska, December, 2011.
  • Charles Landais, M.S., "Ultrasonic methods for the characterization of complex materials and material systems: Polymers, structured polymers, soft tissue and bone," University of Nebraska-Lincoln, Lincoln, Nebraska, May, 2011.
  • Shawn E. Meagher, M.S., "Anomalous loss of toughness of work toughened polycarbonate," University of Nebraska-Lincoln, Lincoln, Nebraska, December, 201o.
  • Quentin Fichot, "Characterization, modeling, and consequences of the development during plastic flow of large anisotropy in the wave speeds," University of Nebraska-Lincoln, Lincoln, Nebraska, December, 201o.
  • Ashwani Kumar Goel, Ph.D., "Large deformation thermodynamically consistent constitutive model for glassy polymers," University of Nebraska-Lincoln, Lincoln, Nebraska, December, 2009.
  • Pierre Delabarre (with Jean-Marc Saiter), Master M2, Materials Engineering (CEMPI), "The Characterization of polycarbonate by DMA and other mechanical testing," University of Rouen, Rouen, France, September, 2004.
  • Kyle Wayne Strabala, "The Effects of Combined Compression and Aging on the Properties of Glassy Polycarbonate," MS, Engineering Mechanics, University of Nebraska-Lincoln, August, 2009.
  • Kyle Wayne Strabala, "The Effects of Combined Compression and Aging on the Properties of Glassy Polycarbonate," MS, Materials Engineering, University of Rouen, Rouen, France, August, 2009.
  • Cline Hayot, "Viscoelastic properties of the cell walls of Arabidopsis thaliana using nanoindentation," MS, Engineering Mechanics, University of Nebraska-Lincoln, August, 2009.
  • Cline Hayot, "Viscoelastic properties of the cell walls of Arabidopsis thaliana using nanoindentation," MS, Materials Engineering, University of Rouen, Rouen, France, August, 2009.
  • Ruojuan Ma, Ph.D., now with Visteon. Thesis: "A study of the influence of uniform crystallization on the mechanical response of polymers and polymer-matrix composites"
  • Juliet Dauphin, "Crystallization studies in PET"-University of Rouen, France.
  • Philippe Dos Santos Claro, "Crystallization in PET during ransient thermal loading" - University of Rouen, France.

Selected Publications

Publications: (Selected)

  • L. Zhang, J. Jasa, G. Gozonas, A. Jerusalem, M. Negahban, "Extracting continuum-like deformation and stress from molecular dynamics simulations," Computer Methods in Applied Mechanics and Engineering, vol. 283, 2015, pages 1010-1031.
  • G. Gao, Z. Li, M. Negahban, "Dynamic fracture analsysis of polycarbonate by optical methods of causitcs," Proceedia Materials Science, vol. 3, 2014, pages 165-176.
  • K. Strabala, S. Meagher, C. Landais, L. Delbreilh, M. Negahban, J.M.-Saiter, J. Turner, A. Ingram, R. Golovchak, "Anisotropic loss of toughness with physical aging of work toughened polycarbonate," Polymer Engineering and Science, vol. 54, 2014, pages 794-804.
  • J.F. Cepeda, C.L. Weller,  M. Negahban, J. Subbia, H. Thippareddi, ``Heat and Mass Transfer Modeling for Microbial Food Safety Applications in the Meat Industry: A Review,'' Food Engineering Reviews, vol. 5, 2013, pages 57-76.
  • L. Zhang, M. Negahban, ``Propagation of infinitesimal thermo-mechanical waves during the finite-deformation loading of a viscoelastic material: General theory," Zeitschrift fur angewandte Mathematik und Physik (ZAMP), vol. 63, 2012, pages 1143-1176.
  • A. Goel, A. Sherafati, M. Negahban, A. Azizinamini, Y. Wang, ``A finite deformation nonlinear thermo-elastic model that mimics plasticity during onotonic loading,'' it International Journal of Solids and Structures, vol. 48, 2011, pages 2977-2986.
  • A. Goel, Y. Wen*, J. Hein, M. Negahban, J. A. Turner, ``Measuring the influence of temperature on the development of the elastic anisotropy with compressive plastic flow for glassy polycarbonate,'' Journal of Engineering Materials and Technology, vol. 133, 2011, pages 030902-1 to 7.
  • A. Goel, K. Strabala, M. Negahban, R. Feng, ``Experimentally evaluating equilibrium stress in uniaxial tests,''  Experimental Mechanics, vol. 50, 2010, pages 709-716.
  • M. Negahban, A. Goel, L. Zhang, "Evaluating the development of elastic anisotropy with plastic flow," Acta Mechanica, vol. 208, 2009, pages 259267.
  • M. Negahban, A. Goel, P. Marchon, A. Azizinamini, "Geometrically Exact Nonlinear Extended-Reissner/Mindlin Shells: Fundamentals, Finite Element Formulation, Elasticity," International Journal for Computational Methods in Engineering Science and Mechanics vol. 10, 2009, pages 430-449.
  • L. Delbreilh, M. Negahban, M.Benzohra, C. Lacabanne, J.-M. Saiter, "Glass transition investigated by a combined protocol using thermostimulated depolarization currents and differential scanning calorimetry," Journal of Thermal Analysis and Calorimetry vol. 96, 2009, pages 865-871.
  • A. Goel, K. Strabala, M. Negahban, J. Turner, "Modeling the development of elastic anisotropy with plastic flow for glassy polycarbonate," Polymer Engineering and Science vol. 49, 2009, pages 1951-1959.
  • J.-M. Saiter, M. Negahban, P. dos Santos Claro, P. Delabare and M.-R. Garda, "Quantitative and Transient DSC Measurements I. Heat Capacity and Glass Transition," Journal of Materials Education, vol. 30, 2008, pages 51-95.
  • M. Negahban, K. Strabala, P. Delabarre, A. Goel, R. Feng, J. Grenet, "Temperature dependence of the back-stress in shear for glassy polycarbonate," Macromolecular Symposia, vol. 258, 2007, pages 142-151.
  • M. Negahban, ``Single and multiple material constraints in thermoelasticity,'' Mathematics and Mechanics of Solids, vol. 12, 2007, pages 623-664.
Dissertation:
  • "Material Symmetry and the Evolution of Anisotropies in First Gradient Theories of Nonlinear Material Behavior; Inelasticity; Polymer Crystallization."
New Book: Published 2012:

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