Journal Papers

1. Effect of the sliding orientation on the tribological properties of polyethylene in molecular dynamics simulations
   S. J. Heo, I. Jang, P. R. Barry, S. R. Phillpot, S. S. Perry, W. G. Sawyer, & Susan B. Sinnott
   
   
2. Effect of Simulation Conditions on Friction in Polytetrafluoroethylene (PTFE)
   P. R. Barry, I. Jang, S. S. Perry, W. G. Sawyer, S. B. Sinnott, & S. R. Phillpot
   
   
3. Mechanical Characterization of Contact Lenses by Microindentation: Constant Velocity and Relaxation Testing
   S. J. Lee, G. R. Bourne, X. Chen, W. G. Sawyer, & M. Sarntinoranont
   
   
4. First-Principles Determination of Static Potential Energy Surfaces for Atomic Friction in MoS2 and MoO3
   T. Liang, W. G. Sawyer, S. S. Perry, S. B. Sinnott, & S. R. Phillpot
   
   
5. Friction Coefficient Measurement of Hydrogel Materials on Living Epithelial Cells
   A. C. Dunn, J. A. Cobb, A. N. Kantzios, S. J. Lee, M. Sarntinoranont, R. Tran-Son-Tay, & W. Gregory Sawyer
   
   
6. Tribological investigation of the effects of particle size, loading and crystallinity on poly(ethylene) terephthalate nanocomposites
   P. Bhimaraj, D. Burris, W. G. Sawyer, C. G. Toney, R. W. Siegel, Linda S. Schadler
   
   
7. Sliding orientation effects on the tribological properties of polytetrafluoroethylene
   I. Jang, D. L. Burris, P. L. Dickrell, P. R. Barry, C. Santos, S. S. Perry, S. R. Phillpot, S. B. Sinnott, & W. Gregory Sawyer
   
   
8. Predicting Knee Replacement Damage in a Simulator Machine Using a Computational Model With a Consistent Wear Factor
   D. Zhao, H. Sakoda, W. G. Sawyer, S. A. Banks, & B. J. Fregly
   
   
9. A novel method for low load friction testing on living cells
   J. A. Cobb, A. C. Dunn, J. Kwon, M. Sarntinoranont, W. G. Sawyer, & Roger Tran-Son-Tay
   
   
10. Spatial geometric effects on the friction coefficients of UHMWPe
    A. C. Dunn, J. G. Steffens, D. L. Burris, S. A. Banks, & W. G. Sawyer
    
    
11. Macroscopic Evidence of Thermally Activated Friction
    D. L. Burris, S. S. Perry, & W. G. Sawyer
    
    
12. Macroscopic Friction Coefficient Measurements on Living Endothelial Cells
    A. C. Dunn, T. D. Zaveri, B. G. Keselowsky & W. G. Sawyer
    
    
13. Thermally Activated Friction
    X. Zhao, M. A. Hamilton, W. G. Sawyer, & S. S. Perry
    
    
14. Direct Contact-Area Computation for MEMS Using Real Topographic Surface Data
    D. J. Dickrell, M. T. Dugger, M. A. Hamilton, and W. G. Sawyer
    
    
15. Lyapunov-Based Tracking Control in the Presence of Uncertain Nonlinear Parameterizable Friction
    C. Makkar, G. Hu, W. G. Sawyer, and W. E. Dixon
    
    
16. Hierarchically constructed metal foam/polymer composite for high thermal conductivity
    D. L. Burris & W. G. Sawyer
    
    
17. Micromolding three-dimensional amorphous metal structures
    J. A. Bardt, G. R. Bourne, T. L. Schmitz, J. C. Ziegert, & W. G. Sawyer
    
    
18. Polymeric Nanocomposites for Tribological Applications
    D. L. Burris, B. Boesl, G. R. Bourne, & W. G. Sawyer
    
    
19. Shrink fit tool holder connection stiffness/damping modeling for frequency response prediction in milling
    T. L. Schmitz, K. Powell, D. Won, G. S. Duncan, W. G. Sawyer, and J. C. Ziegert
    
    
20. Cumulative damage modeling of solid lubricant coatings that experience wear and interfacial fatigue
    N. L. McCook, D. L. Burris, N. H. Kim & W. G. Sawyer
    
    
21. Tribological results of PEEK nanocomposites in dry sliding against 440C in various gas environments
    N. L. McCook, M. A. Hamilton, D. L. Burris, & W. G. Sawyer
    
    
22. A Biphasic Model for Micro-Indentation of a Hydrogel Based Contact Lens
    X. Chen, A. C. Dunn, W. G. Sawyer, & M. Sarntinoranont
    
    
23. Polymer Nanocomposites: A Small Part of the Story
    L.S. Schadler, L. C. Brinson, & W.G. Sawyer
    
    
24. Tunable friction behavior of oriented carbon nanotube films
    P.L. Dickrell, S.K. Pal, G.R. Bourne, C. Muratore, A.A. Voevodin, P.M. Ajayan, L.S. Schadler & W.G. Sawyer
    
    
25. On the friction and wear performance of boric acid lubricant combinations in extended duration operations
    Pushkarraj Deshmukha, Michael Lovell, W. Gregory Sawyer, Anton Mobley
    
    
26. Epoxy, ZnO, and PTFE nanocomposite: friction and wear optimization
    N. L. McCook, B. Boesl, D. L. Burris, & W.G. Sawyer
    
    
27. Tribological behavior of PEEK components with compositionally graded PEEK/PTFE surfaces
    D. L. Burris, & W.G. Sawyer
    
    
28. In-Situ Lubrication with Boric Acid: Powder Delivery of an Environmentally Benign Solid Lubricant
    W.G. Sawyer, J. C. Ziegert, T. L. Schmitz, & T. Barton
    
    
29. A low friction and ultra low wear rate PEEK/PTFE composite
    D. L. Burris & W.G. Sawyer
    
    
30. Super-Compressible Foamlike Carbon Nanotube Films
    A. Cao, P. L. Dickrell, W. G. Sawyer, M. N. Ghasemi-Nejhad, P. M. Ajayan
    
    
31. Cryogenic Friction Behavior of PTFE Based Solid Lubricant Composites
    N. L. McCook, D.L. Burris, P. L. Dickrell, & W.G. Sawyer
    
    
32. Biomechanical Mechanisms for Damage: Retrieval Analysis and Computational Wear Predictions in Total Knee Replacements
    M. K. Harman, S. A. Banks, B. J. Fregly, W. G. Sawyer, & W. A. Hodge
    
    
33. Improved wear resistance in alumina-PTFE nanocomposites with irregular shaped nanoparticles
    D.L. Burris & W.G. Sawyer
    
    
34. Friction coefficient of Soft Contact Lenses: Measurements and Modeling
    A. C. Rennie, P. L. Dickrell, & W.G. Sawyer
    
    
35. Tribological Sensitivity of PTFE-Alumina Nanocomposites to a Range of Traditional Surface Finishes
    David Burris & W.G. Sawyer
    
    
36. Finite Element Analysis and Experiments of Metal/Metal Wear in Oscillatory Contacts
    Nam Ho Kim, Dongki Won, David Burris, Brian Holtkamp, Gregory R. Gessel, Paul Swanson, & W.G. Sawyer
    
    
37. Frictional Anisotropy of Oriented Carbon Nanotube Surfaces
    P. L. Dickrell, S. B. Sinnott, D. W. Hahn, N. R. Raravikar, L. S. Schadler, P. M. Ajayan & W.G. Sawyer
    
    
38. The Wear Resistant Solid Lubricant Coating Made from PTFE and Epoxy
    N. L. McCook, D. L. Burris, G. R. Bourne, J. Steffens, J. R. Hanrahan, & W.G. Sawyer
    
    
39. The Difficulty of Measuring Low Friction: Uncertainty Analysis for Friction Coefficient Measurements
    T.L. Schmitz, J.E. Action, J.C. Ziegert & W.G. Sawyer
     
40. Quantifying multidirectional sliding motions in total knee replacements.
    M.A. Hamilton, M.C. Sucec, B.J. Fregly, S.A. Banks, W.G. Sawyer
     
41. A Gas Surface Interaction Model for Spatial and Time Dependent Friction Coefficient in Reciprocating Contacts: Applications to Near Frictionless Carbon
    P. L. Dickrell, W. G. Sawyer, J. A. Heimberg, I. L. Singer, K. J. Wahl, A. Erdemir
     
42. Effect of matrix morphology on the wear and friction behavior of alumina nanoparticles/poly(ethylene) terephthalate composites
    T. Bhimaraj, D. L. Burris, J. Action, W. Gregory Sawyer, C. G. Toney, R. W. Siegel, L. S. Schadler
    
    
43. Wear Rate Uncertainty Analysis
    T. L. Schmitz, J. E. Action, D. L. Burris, J. C. Ziegert, & W. Gregory Sawyer
    
    
44. Fractional coverage model for the adsorption and removal of gas species and application to superlow friction diamond like carbon
    Pamela L. Dickrell, W. Gregory Sawyer, & Ali Erdemir
     
45. The Relationship between Contact Pressure, Insert Thickness, and Mild Wear in Total Knee Replacements
    Y. Bei, B.J. Fregly, W.G. Sawyer, S.A. Banks & N.H. Kim
     
46. Computational wear prediction of a total knee replacement from in vivo kinematics
    Benjamin J. Fregly, W. Gregory Sawyer, Melinda K. Harman, and Scott A. Banks

 
47. Evolution of Wear in a Two-Dimensional Bushing 
    Daniel J. Dickrell and W. Gregory Sawyer
     
48. Surface shape and contact pressure evolution in two component  surfaces: application to copper chemical mechanical polishing.
    W. Gregory Sawyer
     
49. Temperature modeling in a total knee joint replacement using patient specific kinematics. 
    W. Gregory Sawyer, Matt A. Hamilton, B. J. Fregly, and Scott A. Banks
     
50. A fractional coverage model for gas-surface interaction in reciprocating sliding contacts. 
    W. Gregory Sawyer and Pamela L. Dickrell
     
51. A study on the friction and wear behavior of PTFE filled with alumina nanoparticles.
    W. Gregory Sawyer, Kevin D. Freudenberg, Praveen Bhimaraj, and Linda S. Schadler
    
    
52. Estimation of discretization errors in contact pressure measurements.
    Benjamin J. Fregly, and W. Gregory Sawyer
    
    
53. The evolution of geometry for a wearing circular cam: analytical and computer simulation with comparison to experiment
    D.J. Dickrell, D.B. Dooner,  W. G. Sawyer
    
    
54. Evaluation of a Model for the Evolution of Wear in a Scotch-Yoke Mechanism
    W. Gregory Sawyer, Kelvin I. Diaz, Matthew A. Hamilton, and Brian Micklos
    
    
55. Vapour Phase Lubrication using Hydrocarbon Feed Gases
    James E. Gardner, W. Gregory Sawyer, and Thierry A. Blanchet
    
    
56. Differential Application of Wear Models to Fractional Thin Films
    Thierry A. Blanchet and W. Gregory Sawyer
    
    
57. Lubrication with Granular Flow: Continuum Theory, Particle Simulations, Comparison with Experiment
    W. Gregory Sawyer and John A. Tichy
    
    
58. Wear Predictions for a Simple-Cam Including the Coupled Evolution of Wear and Load
    W. Gregory Sawyer
    
    
59. Vapor-Phase Lubrication in Combined Rolling and Sliding Contacts: Modeling and Experimentation
    W. Gregory Sawyer and Thierry A. Blanchet
    
    
60. High Temperature Lubrication of Combined Rolling / Sliding Contacts via Directed Hydrocarbon Gas Streams
    W. Gregory Sawyer and Thierry A. Blanchet
    
    
61. Lubrication of Mo, W, and Their Alloys with H₂S Gas Admixtures to Room Temperature Air
    W. Gregory Sawyer and Thierry A. Blanchet
    
    
62. High Temperature Lubrication of Various Ceramics and Metal Alloys via Directed Hydrocarbon Feed Gases
    Nicholas J. Barnick, Thierry A. Blanchet, W. Gregory Sawyer, and James E. Gardner
    
    
63. Comparison on Various C2Hx for High Temperature Lubrication by in situ Pyrolysis
    D. M. Holmes, W. Gregory Sawyer, and Thierry A. Blanchet
    
    
64. Lubrication of Silicon Nitride in a Simulated Turbine Exhaust Gas Environment
    W. Gregory Sawyer, Thierry A. Blanchet, and Salvadore J. Calabrese
    
    
65. Solid Lubrication by Decomposition of Carbon Monoxide and Other Gases
    T.A. Blanchet, J.L. Lauer, Y.-F. Liew, S.J. Rhee, W.G. Sawyer
    
    
66. Non-Newtonian Lubrication with the Second-Order Fluid
    W. Gregory Sawyer and John A. Tichy
    
    
67. Friction Modeling and Experimentation for Integral Fasteners for Injection Molded Parts
    W. Gregory Sawyer, Thierry A. Blanchet, Keith N. Knapp II, and Daeyong Lee