Mechanical Engineering

Dr. Darrell Hoy

Associate Dean for Academic Affairs, College of Engineering

Professor of Mechanical Engineering



  • 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


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


  • 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


American Society of Mechanical Engineers

Society for Experimental Mechanics

Order of the Engineer

Phi Kappa Phi


“Best Darn Chair Award”, TTU 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)




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


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.