Darrell Hoy, Ph.D.



Darrell  Hoy, Ph.D.


Associate Dean for Academic Affairs and Professor of Mechanical Engineering


College of Engineering

Email Address:



(931) 372-3172


CLEM 201


  • Experimental Stress Analysis
  • Photoelasticity
  • Strain Gages
  • Digital Imaging
  • Residual Stress Analysis


  • Professor of Mechanical Engineering and Assistant Dean for Assessments & Extended Programs, TTU, 2013-2014
  • Chairperson and Professor of Mechanical Engineering, TTU, 2005-2013
  • Interim Chair and Professor of Mechanical Engineering, TTU, 2003-05 

Educational Background

  • BS (Mechanical Engineering.), North Carolina State University, 1979
  • MS (Mechanical Engineering), North Carolina State University, 1982
  • Ph.D. (Mechanical Engineering), North Carolina State University, 1985

Other Related Experience

  • Measurement Systems Course Instructor for Sverdrup, Inc., AEDC, Tullahoma, TN, Summer, 2000
  • Summer Faculty Research Program, AFOSR, AEDC, Tullahoma, TN, Summer 1988
  • Visiting Assistant Professor, North Carolina State University, 1986-1987
  • Research Assistant, North Carolina State University, 1982-1985
  • Development Engineer, IBM Corporation, Research Triangle Park, NC, Summers 1980, 1981
  • Teaching Assistant, North Carolina State University, 1979-1982
  • Engineering Assistant, IBM Corporation, Raleigh, NC, Summer 1978

Scientific and Professional Societies

  • American Society of Mechanical Engineers
  • Society for Experimental Mechanics
  • Order of the Engineer
  • Phi Kappa Phi

Honors and Awards

  • “Best Darn Chair Award”, Tennessee Tech Pi Tau Sigma Student Chapter, 2013
  • Leighton E. Sissom Award for Innovation and Creativity, 2003
  • D.R. Harting Award 2000 (Society for Experimental Mechanics) for the best journal paper published in Experimental
  • Technique during the year 1998
  • Best Paper in Conference Award, IAMSDC-1, 1989
  • Graduate Teaching Assistant Award, 1982 (NCSU)
  • Elected Phi Kappa Phi Honor Society (NCSU)
  • Elected Pi Mu Epsilon Mathematics Honor Society (NCSU) 


  • Statics
  • Dynamics
  • Dynamics of Machinery I, II, III
  • Kinematics of Machinery
  • Mechanics of Solids
  • Machine Design
  • Measurement Systems
  • Design of Measurement Systems
  • ME Senior Design Project
  • Experimental Stress Analysis
  • Photoelasticity
  • Current Techniques in Experimental Mechanics

Recent Funding Projects (Principal Investigator Unless Otherwise Noted):

  • "Photoelastic Testing of Humeral Head," IntegraLife, Manufacturing Center Testing Project, 2012, $2081
  • "Photoelastic Testing of Assembly Stresses in Bolted-Flange Oil Cooler," Cummins Filtration, Manufacturing Center Testing
  • Project, 2007, $980
  • “Residual Stress Testing of Nissan Xterra Hood,” Nissan North America, Inc., Manufacturing Center Testing Project,2005,
  • $1660
  • Acquisition of Research and Education Equipment for Geometric Design and Manufacturing Integration,” NSF, (Co-PI; K.
  • Ting, PI; Jackson, Li, Liu, Co-PIs), $304,143, 2003-2005
  • “Photoelastic Testing of Laptop Keys,” Exponent, Inc. for APPLEÔ Computer Company, Manufacturing Center Testing
  • Project, 2003, $895
  • RECENT PUBLICATIONS (Journal, Conference, Software):
  • Hoy, D.E.P., and Gingras, K. M., Photoelastic Study of Wound Closure Stresses in Barbed vs. Traditional Smooth Sutures",
  • Accepted for publication in Experimental Techniques, 2013”
  • Wosu, S.N., and Hoy, D., “Digital Imaging and Fractographical Analysis of Perforation-induced Delamination of Laminated
  • Graphite-Epoxy Composite,” Journal of Composite Materials, Vol. 40, No. 17/2006.
  • Hoy, D.E.P., “An Interactive Photoelastic Bulletin Board,” 2003 SEM Annual Conference, Jun., 2003.