Faculty/Staff Profile

Darrell E Hoy, Ph.D.

Professor of Mechanical Engineering, Asst Dean for Assessments & Extended Ed (Temp Appt)

Highest Degree University: North Carolina State University
Department: Mechanical Engineering
Brown Hall (BRWN) 224A
PO Box: 5014
(931) 372-3197

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

More Information


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

 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”, 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) 

Courses Taught:



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 Funded 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.


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