Hongbing Lu 

Professor

School of Mechanical and Aerospace Engineering

218 Engineering North

Stillwater, OK74078

 

Phone: (405) 744-5900

Email: hongbing.lu@okstate.edu

 

Academic Background

 

Ph.D., Aeronautics, California Institute of Technology, Pasadena, California, 1997
M.S., Engineering Mechanics, Tsinghua University, Beijing, China, 1988
B.S., Solid Mechanics, Huazhong University of Science and Technology, Wuhan, China, 1986

Areas of Interest

Viscoelasticity, Experimental Mechanics, Computational Mechanics, Multiscale Simulations, Mechanics of Nanocomposites and other Nanostuctured Materials, Dynamic Fracture, Viscoelastic Behavior at High Strain Rates, Shear Slitting/Cutting, Nanomechanics, Viscoelastic Nanoindentation, Ear Biomechanics

 

Polymer Mechanics Laboratory

 

Research Areas

Nanomechanics and Mechanics of Nano-structured Materials: (1) Methods for measurements of viscoelastic functions in both time- and frequency-domains using nanoindentation; (2) Viscoelastic behavior of nano-structured materials, nanocomposites, polymers, nanocomposites using nanoindentation, atomic force microscope, high resolution TEM, and nanoparticle embeddments; (3) Characterization and modeling of crosslinked silica aerogels, crosslinked vanadia aerogels, and crosslinked templated aerogels, using nanoindentation, liquid nitrogen porosimetry, Dynamic Mechanical Analysis (DMA), and high-resolution microscopy; (4) Solving inverse problems to determine the mechanical behavior of single crystals at the sub-micron scale using nanoindentation and crystal plasticity; (5) Characterization and modeling of single-wall carbon nanotube/polyelectrolyte multilayer nanocomposites.

 

Viscoelasticity: (1) Long-term durability of polymers under quasi-static and dynamic loading conditions; (2) Long-term durability of polymer matrix composites used at high temperature environment; (3) Mechanical behavior of plastic foams, and fiber reinforced plastic foams under quasi-static loading, and dynamic loading conditions using digital image correlation, tomography and ultra-high speed photography (62 color frames, up to 4 million frames per second); (4) Nonlinear constitutive modeling of polymers under multiaxial loading conditions; (5) Nonlinear constitutive modeling of polymers under high strain rates.

             

Experimental Techniques: (1) Measurements of large nonlinear surface deformations using digital image correlation with the implementation of second order displacement gradient terms (strain gradients), as well as third-order displacement gradients ( in addition to the first order displacement gradient terms); (2) Measurements of viscoelastic functions in the audible frequency range (100 Hz – 20,000 Hz) for polymers; (3) Nanoindentation for the measurements of both in-plane and out-of-plane properties of viscoelastic films in both time- and frequency-domains, and measurements of both bulk and shear relaxation functions using both Berkovich and spherical indenters.

 

Computational Mechanics: (1) 2D and 3D structured mesh refinement, and parallel processing techniques for the Generalized Interpolation Material Point (GIMP) Method; (2) Simulation of dynamic problems with complex contact surfaces, such as compaction of bulk metallic glass foam using parallel processing; (2) Simulation of dynamic crack growth using GIMP and normal/tangential cohesive laws; (3) Coupling molecular dynamics (MD), discrete dislocations with continuum; (4) Seamless coupling between MD and continuum using the material point methods and MD.

 

         Bioengineering (Ear Biomechanics for Restoration of Hearing): (1) Measurements of the viscoelastic properties of tissues in human ears such as tympanic membrane (eardrum) and ligaments using nanoindentation; (2) Measurements of viscoelastic properties in the frequency domain; (3) Modeling the acoustic transmission in normal and diseased human ears.

 

          Manufacturing Processes: (1) Sheet metal slitting/cutting technique using shear slitting/cutting when two rotary blades forming a rake angle are not in contact; (2) Modeling stress/strain distribution in 3D winding of viscoelastic webs (films) to determine the film flatness upon unwinding.

Professional Associations

 Society for Experimental Mechanics, Member of the International Advisory Board (2005-2008), Chair of the Division of Time-Dependent Materials, 6/2000-6/2003
 Member of the Editorial Board, Journal: Mechanics of Time-Dependent Materials
 Sigma Xi Research Society
 American Society of Mechanical Engineers (ASME)
 American Institute of Aeronautics and Astronautics (AIAA)

Awards And Fellowships

2008, CEAT Halliburton Outstanding Faculty Member Award, OSU

2007, Best Poster Award, 14th International Sol-Gel Conference, Montpellier, France

2007, Best Paper Award, the Ninth International Conference on Web Handling, Stillwater, OK

2004, 2005 & 2006, Mechanical Engineering Golden Screw Award, MAE, OSU

2001, CEAT Halliburton Outstanding Young Faculty Member Award, OSU

2000-2004, NSF Career Award

1998-2000, 3M Non-Tenured Faculty Award

1993, 1995, Li Ming Scholarship Award (Caltech)

1991, Charles Lee Powell Foundation Graduate Fellowship (Caltech)

Software

CreepCalculator is a program developed for processing nanoindentation data to find the creep compliance in the time-domain for linearly viscoelastic materials using the method described in the paper “Measurement of Creep Compliance of Solid Polymers by Nanoindentation,” H. Lu, B. Wang,J. Ma,G. Huang and H. Viswanathan, Mechanics of Time-Dependent Materials, Vol. 7, pp. 189-207, 2003. The software is available for unlimited distribution, but is not allowed for any revision in any format.

Selected Publications

  1. N. Leventis, C. Sotiriou-Leventis, S. Mulik, A. Dass1, J. Schnobrich, A. Hobbs, E. F. Fabrizio, H. Luo, G. Churu, Y. Zhang, H. Lu, “Polymer Nanoencapsulated Mesoporous Vanadia with Unusual Ductility at Cryogenic Temperatures,” Journal of Materials Chemistry, 2008 (highlighted as a “hot article” in the journal) Paper Weblink: http://www.rsc.org/Publishing/Journals/JM/article.asp?doi=b801770k, News on the website of Chemical Science of the Royal Chemical Society (UK): http://www.rsc.org/Publishing/ChemScience/Volume/2008/05/Strength_in_nanoworms.asp

 

  1. Nicholas Leventis, Sudhir Mulik, Xiaojiang Wang, Amala Dass, Vishal U. Patil, C. Sotiriou-Leventis, Hongbing Lu, Gitogo Churu, Alex Capecelatro, “Conformal Polymer Nano-Encapsulation of Ordered Mesoporous Silica Monoliths for Improved Mechanical Properties,” Journal of Non-Crystalline Solids, Vol. 354, pp. 632-644, 2008

 

  1. Y. Liu, S. Varghese, J. Ma, M. Yoshino, H. Lu, and R. Komanduri, “Orientation Effects in Nanoindentation of Single Crystal Copper,” International Journal of Plasticity, Published Online 12 March 2008, DOI: 10.1016/j.ijplas.2008.02.010

 

  1. N. P. Daphalapurkar, J. C. Hanan, N. B. Phelps, H. Bale, H. Lu, “Simulation of Microstructure Evolution of a Closed-Cell Polymeric Foam in Compression,” Mechanics of Advanced Materials and Structures, 2008 (in press)

 

  1. Gang Huang, Nitin Daphalapurkar, Rong Z. Gan, and Hongbing Lu, “A Method for Measuring Linearly Viscoelastic Properties of Human Tympanic Membrane Using Nanoindentation,” ASME: Journal of Biomechanical Engineering,Vol. 130, 014501-1, 2008

 

  1. Wolfgang G. Knauss, Igor Emri and Hongbing Lu, “Mechanics of Polymers: Viscoelasticity,” Book Chapter in Handbook of Experimental Solid Mechanics, 2008 (in press)

 

  1. Gyu-ho Kim, Hongbing Lu, “Accelerated Fatigue Life Testing of Polycarbonate at Low Frequency under Isothermal Condition,” Polymer Testing, Vol. 27, pp. 114-121, 2008

 

  1. Gyu-Ho Kim and Hongbing Lu, “Characteristics of Accelerated Lifetime Behavior of Polycarbonate under Athermal and High Loading Frequency Conditions,” Polymer Testing, Vol. 26, pp. 839-845, 2007

 

  1. Farzana Hussain, S. Roy, K. Narasimhan, K. Vengadassalam, H. Lu, “E-glass-polypropylene pultruded nanocomposite: Manufacture, characterization, thermal and mechanical properties,” Journal of Thermoplastic Composite Materials, Vol. 20, No. 4, pp. 411-434, 2007

 

  1. Nicholas Leventis, Sudhir Mulik, Xiaojiang Wang, Amala Daas, C. Sotiriou-Leventis, Hongbing Lu, “Stresses at the Interface of Micro with Nano,” Journal of the American Chemical Society, Vol. 129, No. 35, pp. 10660-10661, 2007

 

  1. H. Lu and G. Huang, “Viscoelastic Nanoindentation,” Book Chapter, in New Research in Thin Solid Films, ISBN: 1-60021-454-1, Nova Science Publishers, 2007

 

  1. Nitin P. Daphalapurkar, Hongbing Lu, Demir Coker, and Ranga Komanduri, “Simulation of Dynamic Crack Growth Using the Generalized Interpolation Material Point (GIMP) Method,” International Journal of Fracture, Vol. 143, pp. 79-102, 2007

 

  1. S. Roy, Farzana Hussain, K. Narasimhan, K. Vengadassalam, H. Lu, “E-glass/polypropylene Pultruded Nanocomposite: Manufacture, Characterisation, Thermal and Mechanical properties,” Polymers & Polymer Composites, Vol. 15, No. 2, pp. 91-102, 2007

 

  1. G. Huang and H. Lu, “Measurements of Two Independent Viscoelastic Functions by Nanoindentation,” Special Issue - Nanoscale Measurements in Mechanics, in Experimental Mechanics, Vol. 47, pp. 87-98, 2007

 

  1. Gang Huang, Hongbing Lu, “Measurement of Young’s Relaxation Modulus Using Nanoindentation,” Mechanics of Time-Dependent Materials, Vol 10, No. 3, pp. 229-243, 2006

 

  1. Jin Ma, Yang Liu, Hongbing Lu, and Ranga Komanduri, “Multiscale Simulation of Nanoindentation using the Generalized Interpolation Material Point (GIMP) Method, Dislocation Dynamics (DD) and Molecular Dynamics (MD),” Computer Modeling in Engineering & Sciences, Vol. 16, No. 1, pp. 41-56, 2006

 

  1. H. Lu, J. Ma and M. Li, “Edge Trimming of Aluminum Sheets Using Shear Slitting at a Rake Angle,” ASME: Journal of Manufacturing Science and Engineering, Vol. 128, pp. 866-873, 2006

 

  1. Huiyang Luo, Hongbing Lu and Nicholas Leventis, “The Compressive Behavior of Isocyanate-Crosslinked Silica Aerogel at High Strain Rates,” Mechanics of Time-Dependent Materials, Vol. 10, pp. 83-111, 2006

 

  1. J. Ma, H. Lu, B. Wang, R. Hornung, A. Wissink, and R. Komanduri, “Multiscale Simulation Using Generalized Interpolation Material Point (GIMP) Method and Molecular Dynamics (MD),” Computer Modeling in Engineering & Sciences, Vol. 14, No. 2, pp. 101-117, 2006

 

  1. J. C. Hanan, J. Ma, C. Veazey, H. Lu, M. D. Demetriou, W. L. Jonson,  “Microtomography and 3-Dimensional Stresses of Compressed Low-Density Amorphous Metal Foam,” TMSLetters, Vol. 3, No. 1, pp. 9-10, 2006

 

  1. G. Huang, B. Wang, H. Lu, A. Mamedov, S. Gupta, “Material Characterization and Modeling of Single-wall Carbon Nanotube/Polyelectrolyte Multilayer Nanocomposites,” ASME: Journal of Applied Mechanics, Vol. 73, pp. 737-744, 2006

 

  1. H. Lu, N.P. Daphalapurkar, B. Wang, S. Roy and R. Komanduri, “Multiscale Simulation from Atomistic to Continuum – Coupling Molecular Dynamics (MD) with Material Point Method (MPM),” Philosophical Magazine, Vol. 86, No. 20, pp. 2971-2994, 2006

 

  1. J. Ma, H. Lu and R. Komanduri, “Structured Mesh Refinement in Generalized Interpolation Material Point (GIMP) Method for Simulation of Dynamic Problems,” Computer Modeling in Engineering & Sciences, Vol. 12, No. 3, pp. 213-227, 2006

 

  1. W. Chen, G. Huang, H. Lu, D.E. McCready, A.G. Joly, “Utilizing Nano-Fabrication to Construct Strong, Luminescent Materials,” Nanotechnology, Vol. 7, 2595-2601, 2006

 

  1. J. Ma, H. Lu, M. Li and B. Wang, “Burr Height in Shear Slitting of Aluminum Webs,” ASME: Journal of Manufacturing Science and Engineering, Vol. 128, pp. 46-55, 2006

 

  1. Atul Katti, Nilesh Shimpi, Samit Roy, Hongbing Lu, Eve F. Fabrizio, Amala Dass, Lynn A. Capadona, and Nicholas Leventis, “Chemical, Physical and Mechanical Characterization of Isocyanate-crosslinked Amine-modified Silica Aerogels,” Chemistry of Materials, Vol. 18, No. 2, pp. 285-296, 2006

 

  1. H. Lu, G. Huang, B. Wang, A. Mamdov, S. Gupta, “Characterization of the Linear Viscoelastic Behavior of Single-wall Carbon Nanotube/Polyelectrolyte Multilayer Nanocomposite Film Using Nanoindentation,” Thin Solid Films, 500, 197-202, 2006

 

  1. S. Roy, K. Vengadassalam, F. Hussain, H. Lu, “Manufacturing and Mechanical Characterization of Pultruded Thermoplastic Nanocomposites,” Book Chapter, in Nanoengineering of Structural, Functional and Smart Materials, Edited by Mark J. Schulz, Ajit D. Kelkar, and Mannur J. Sundaresan, CRC, Taylor & Francis Group, 2005 

 

  1. Y. Liu, B. Wang, M. Yoshino, S. Roy, H. Lu and R. Komanduri, “Combined Numerical Simulation and Nanoindentation for Determining Mechanical Properties of Single Crystal Copper at Mesoscale,” Journal of the Mechanics and Physics of Solids, Vol 53, pp. 2718-2741, 2005

 

  1. B. Wang, V. Karuppiah, H. Lu, S. Roy and R. Komanduri, “Two-dimensional Mixed Mode Crack Simulation Using the Material Point Method,” Mechanics of Advanced Materials and Structures, Vol. 12, pp. 471-484, 2005

 

  1. J. Ma, H. Lu, B. Wang, S. Roy, R. Hornung, A. Wissink and R. Komanduri, “Multiscale Simulations Using Generalized Interpolation Material Point (GIMP) Method and SAMRAI Parallel Processing,” Computer Modeling in Engineering and Sciences, Vol. 8, No. 2, pp. 135-152, 2005

 

  1. C. Liu, H. Lu and Y. Huang, “Dynamic Steady-State Stress Field in a Web During Slitting,” Journal of Applied Mechanics, Vol. 72, pp. 157-164, 2005

 

  1. G. Huang, B. Wang and H. Lu, “Measurements of Viscoelastic Functions in Frequency-Domain by Nanoindentation,” Mechanics of Time-Dependent Materials, Vol. 8, pp. 345-364, 2004

 

  1. H. Lu, B. Wang, J. Ma, G. Huang and H. Viswanathan, “Measurement of Creep Compliance of Solid Polymers by Nanoindentation,” Mechanics of Time-Dependent Materials, Vol. 7, pp. 189-207, 2003

 

  1. B. Wang, H. Lu, G. Tan and W. Chen, “Strength of Damaged Polycarbonate After Fatigue,” Theoretical and Applied Fracture Mechanics, Vol. 39, No. 2, pp. 163-169, 2003

 

  1. B. Wang, H. Lu and G. Kim, “A Damage Model for the Fatigue Life of Elastomeric Materials,” Mechanics of Materials, Vol. 34, pp. 475-483, 2002

 

  1. H. Lu, G. Tan and W. Chen, “Modeling of Constitutive Behavior for Epon 828/T-403 at High Strain Rates,” Mechanics of Time-Dependent Materials, Vol. 5, No. 2, pp. 119-130, 2001

 

  1. H. Lu and P.D. Cary, “Deformation Measurements by Digital Image Correlation: Implementation of Second Order Displacement Gradients,” Experimental Mechanics, Vol. 40, No. 4, pp. 393-400, 2000

 

  1. H. Richter, E. Misawa, D. Lucca and H. Lu, “Modeling Nonlinear Behavior in a Piezoelectric Actuator,” Precision Engineering, Vol. 25, pp. 128-137, 2000

 

  1. H. Lu and W.G. Knauss, “The Role of Dilatation in the Nonlinearly Viscoelastic Behavior of PMMA under Multiaxial Stress States,” Mechanics of Time Dependent Materials, Vol. 2, No. 4, pp. 307-334, 1999

 

  1. H. Lu, X. H. Zhang and W. G. Knauss, “Uniaxial, Shear and Poisson Relaxation and their Conversion to Bulk Relaxation— Studies on Poly(Methyl Methacrylate)” Polymer Engineering and Science, Vol. 37, No. 6, pp. 1053-1064, 1997

 

  1. H. Lu, G. Vendroux and W.G. Knauss, “Surface Deformation Measurements of a Cylinder by Digital Image Correlation,” Experimental Mechanics, Vol. 37, No. 4, pp. 433-439, 1997

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