Roger D. Bradshaw, Ph.D.
Associate Professor of Mechanical Engineering
203 Sackett Hall
Dr. Bradshaw's research interests focus on modeling the mechanical behavior of advanced polymer matrix composite material systems and design approaches for lightweight structures. Current efforts include modeling the static strength and fatigue and crack growth behavior of titanium-graphite fiber (TiGr) composites, the effect of waviness on the modulus of nanotube-reinforced polymers, and time-dependent behavior of polymers and polymer matrix composites.
Ph.D. in mechanical engineering, Northwestern University, 1997.
B.A. in history, Virginia Tech, 1995.
M.Sc. in mechanical engineering, Louisiana State University, 1991.
B.Sc. in mechanical engineering, Virginia Tech, 1988.
Original appointment as assistant professor - 2002.
Tenure and promotion to associate professor - 2008.
Portion of time committed to teaching - 50 percent.
Portion of time committed to research and scholarly activities - 40 percent.
Portion of time committed to institutional and professional service - 10 percent.
11/01-10/02, Northwestern University, Evanston, IL. Postdoctoral fellow.
3/98-8/01, The Boeing Company, Seattle, WA. Senior specialist engineer, structures and product development.
99/97-8/01, University of Washington, Seattle, WA. Research associate and part-time lecturer, Mechanical Engineering Department.
9/93-8/97, Northwestern University, Evanston, IL. Graduate fellow/research associate.
6/88-9/93, Ethyl Corporation, Baton Rouge, LA. Mechanical development engineer, Engineering Department.
Guo, Y., Wang, N., Bradshaw, R.D. and Brinson, L.C., "Modeling Mechanical Aging Shift Factors in Glassy Polymers During Nonisothermal Physical Aging. I. Experiments and KAHR-ATE Model Prediction," Journal of Polymer Science, Part B: Polymer Physics, 47(3), 340-352, 2009.
Bai, T., Bradshaw, R.D., Ramanathan, T., Nunalee, F.N., Shull, K.R., Mason, T.O. and Brinson, L.C., "Planar Aqueous Electrode Technique for Polymer Impedance Spectroscopy," Polymer Engineering and Science, DOI 10.1002/pen.21276.
Resapu, R.R., Nagendran, K.B., Bradshaw, R.D., "A Finite Element Method for the Determination of Optimal Viscoelastic Material Properties from Indentation Tests of Polymer Film and Wire with Polymer Insulation," Experimental Mechanics, 48, 713–729, DOI 10.1007/s11340-007-9109-x, 2008.
Bradshaw, R.D. and Gutierrez, S.E., "Characterization of Fatigue Crack Initiation and Growth in Hybrid Aluminum-Graphite Fiber Composite Laminates Using Image Analysis," Fatigue & Fracture of Engineering Materials & Structures, 30(8), 2007.
Guo, Y. and Bradshaw, R.D., "Isothermal Physical Aging Characterization of Polyether-Ether-Ketone (PEEK) and Polyphenylene Sulfide (PPS) Films by Creep and Stress Relaxation," Mechanics of Time-Dependent Materials, 11(1), 61-89, 2007.
Scientific and Professional Societies
American Society of Mechanical Engineers (ASME)
Society for Experimental Mechanics (SEM)
American Institute of Aeronautics and Astronautics (AIAA)
Honors and Awards
Pi Tau Sigma
Institutional and Professional Service
Faculty advisor for Pi Tau Sigma (2003-present)
Mechanical Engineering Program Assessment Committee (2003-present)
Speed School Assessment Committee (2004-present)
Speed School Academic Integrity Review Committee (2004-present)
Speed School Faculty Council - M.E. Department representative (2009-present)
Member, 2004-05 Civil Engineering faculty search committee
Member, 2006-07 M.E. MEMS/NEMS faculty search committee
Member of 2008-09 Civil Engineering faculty search (ongoing)
Chair, Time-Dependent Materials II Session, 2008 Society for Experimental Mechanics Annual Conference, June 2008, Orlando, FL
Organized the symposium entitled "Advanced Nanocomposite Systems (with Drs. F. Fisher, Stevens Inst. of Tech., and C. Brinson, Northwestern Univ.) at the 2005 Joint ASME/ASCE/SES Conf. on Mechanics and Materials, Baton Rouge, LA
Reviewer for six journals: Int. J. Solids and Structures, Composites Science and Technology, Composites – Part A, Proc. National Academy of Sciences, Experimental Mechanics, Mech. Time-Dependent Materials, J. Applied Polymer Science, J. Polymer Science – Part B, and J. Materials: Design and Applications
Professional Development Activities
Attended/presented, 2008 Mech. Time-Dependent Materials Conf., Monterey, CA
Attended/presented, 2008 Soc. for Exp. Mech. Annual Conference, Orlando, FL
Attended and presented at the 2007 Joint ASME/ASCE/SES Conference on Mechanics and Materials, Austin, TX
Attended/presented, 2008 Soc. for Exp. Mech. Annual Conference, St. Louis, MO
Attended/presented, 2008 Soc. for Exp. Mech. Annual Conference, Portland, OR
Attended/presented, 2005 Joint ASME/ASCE/SES Conference on Mechanics and Materials, Baton Rouge, LA
Attended 2004 Gordon Conference – Composite Materials (Ventura, CA)