Ralph I. Stephens

Ralph I. Stephens
(319) 335-6397
1128 Seamans Center for the Engineering Arts and Sciences
Joined the College of Engineering: 
Ph.D., Engineering Mechanics, University of Wisconsin, 1965.
M.S., Theoretical and Applied Mechanics, University of Illinois, 1960.
B.S., General Engineering, University of Illinois, 1957.
Special Fields of Knowledge: 
Fatigue; fracture mechanics; product liability.
Selected Publications: 
  • Stephens, R.I., Fatemi, A., Stephens, R.R. and Fuchs, H.O., Metal Fatigue in Engineering, 2nd edition, Wiley Interscience, New York, 2000, (455 pages).
  • Pals, T.J. and Stephens, R.I., "The Influence of High R Ration on Mild and Sharp Notched and Unnotched Fatigue Behavior of 1045 Steel with Three Different Heat Treatments," International Journal of Fatigue, Vol. 26, pp. 651-661, 2004.
  • Sigl, K.M., Hardin, R.A., Stephens, R.I., and Beckermann, C., "Fatigue of 8630 Cast Steel in Presence of Porosity," International Journal of Cast Metals Research, Vol. 17, No. 3, pp. 130-146, 2004.
  • Stephens, R.I., Bradley, N.J., Horn, J.J., Gradman, J.M., Arkema, J.M., and Borgwadt, C.S., " Fatigue of High Strength bolts Rolled Before or After heat Treatment with Five Different Preload Levels," SAE publication, 2005.
  • Vo, L.D. and Stephens, R.I., "Effect of Shot and Laser-Peening on SAE 1010 Steel Tubes with Transverse Center Weld Subjected to Constant and Variable Amplitude Loading." ICF 12 Proceedings Ottawa, Canada, July 2009.
Active Scientific and Professional Society Memberships: 
Sigma Xi; Pi Tau Sigma; American Society of Testing and Materials, E08 on Fatigue and Fracture; Society of Automotive Engineers Fatigue Design and Evaluation; Registered Professional Engineer, State of Iowa.