Dr. Ruqiang Feng, Associate Professor
Mechanical & Materials Engineering
University of Nebraska - Lincoln
W316 Nebraska Hall
Lincoln, Nebraska 68588-0526
office: (402) 472-2384
Dr. Feng's research is focused on experimental and computational mechanics of materials. Areas of interest include inelastic deformation, damage and failure mechanisms of solids, high strain rate and shock wave phenomena, rheology of polymers and polymer compounds, surface mechanics and tribology (friction and wear), polycrystal modeling and simulations, and hybrid atomistic-continuum modeling and simulations of defects/heterogeneities in materials and material systems. Some of the recent research projects are:
· The Role of Fracture Surface Topography and Friction in Dynamic Response of Armor Ceramics (DEPSCoR/ARO project): A novel experimental approach that combines Kolsky-torsion-bar tribometric experiment with 3-D non-contact surface profilometry is developed and used to characterize the dynamic tribological response of fractured material surface pairs.
· Polycrystal Modeling of Ceramics Subjected to High Strain Rates and Pressures (DEPSCoR/ARO project): A material modeling technique that combines Voronoi-polycrystal microstructural model with FE analysis is developed and employed to analyze intragranular microplasticity and intergranular microdamage in polycrystalline ceramics subjected to impulsive compression and tension.
· Multiscale Treatment of Solid-Fluid Interfaces: Development of Hybrid Monte Carlo and Finite Element Code (NFS ITR project): A coarse-grained Monte Carlo (CGMC) method and a hybrid atomistic-quasicontinuum modeling technique using CGMC for length scale coupling are developed and applied for modeling and simulation of a tribological system involving thin-film lubrication.
· Manufacturing of Novel Continuous Nanocrystalline Ceramic Nanofibers with Superior Mechanical Properties (NSF NIRT project): A Voronoi-polycrystal-based FE model for nanocrystalline materials is developed and used to study the nanomechanical behavior of nanocrystalline ZrO2 nanofibers.
Wu, M. S., and Feng, R., “Micromechanical Investigation of Heterogeneous Microplasticity in Ceramics Deformed under High Confining Stresses,” Mech. Mater. 37 (1), 95 (2005).
Hu, Y and Feng, R., “On the Use of Kolsky Torsion Bar to Study the Transient Large-Strain Response of Polymer Melts at High Shear Rates,” J. Appl. Mech. 71, 441 (2004).
Huang, H. and Feng, R., “A Study of the Dynamic Tribological Response of Closed Fracture Surface Pairs by Kolsky-Bar Compression-Shear Experiment,” Int. J. Solids Struct. 41, 2821-2835 (2004).
Wu, Z.-B., Diestler, D. J., Feng, R., and Zeng, X. C., “Hybrid Atomistic-Coarse-Grained Treatment of Thin-Film Lubrication,” J. Chem. Phys. 120, 6744 (2004).
Wu, Z.-B., Diestler, D. J., Feng, R., and Zeng, X. C., “Coarse-Graining Description of Solid Systems at Non-Zero Temperature,” J. Chem. Phys. 119, 8013-8023 (2003).
Zeng, C., Feng, R., Xin, X., and Shen, L., “A Damage Model with Shear-Induced Dilatancy: Application to Failure Wave in Shocked Glass,” Int. J. Numer. Meth. Eng. 56, 1979-1997 (2003).
· S. Xue, M.S., May 2003.
· H. Huang, Ph.D., May 2003.
· Y. Hu, Ph.D., August 2003.