Associates

Our associates offer expertise ranging from advanced and basic NDE to materials analysis, design of experiments and software development.
 
 
 
 

     Dr. L. R. Cornwell holds a Ph. D. in metallurgy from McMaster University in Canada.  His main interest is in structure-property relationships, particularly on the effects of deformation. He is experienced in using x-ray diffraction and electron microscopy in the study of microstructure of alloys following deformation. Dr. Cornwell  performs failure analysis from a metallurgical standpoint, and has served as a consultant to several companies and organizations. He retired from Texas A&M University in 1998 after teaching in the Department of Mechanical Engineering for 28 years.
 
(Voice) 979-764-3073, (Fax) 979-694-2736
;
lrcornwell@brayengr.com

 

   
  • Materials and metallurgy
  • Deformation
  • Failure analysis 
     
 

     Dr. Roderic K. Stanley holds a Ph.D. in solid state physics from Florida State University, where he studied superconductivity. He spent several years working for Baker Tubular Services and NL McCullough in Houston, Texas, where he was involved with the development of magnetic and ultrasonic inspection techniques for oilfield tubulars. He holds 4 patents in electromagnetic inspection from this work. Also, he worked in the quality departments at Lone Star Steel and Quality Tubing, Inc, and is now the senior development scientist at the latter.

Professionally, he is a member of the American Society for Nondestructive Testing (ASNT), the American Society of Mechanical Engineers (ASME), the American Society for Testing and Materials (ASTM) and the British Institute for Non-destructive Testing (BINDT). He serves as co-chairman for the American Petroleum Institute Resource Group for Coiled Tubing. He holds Fellow membership rank in ASNT, and is certified at Level III in MT, UT and ET.

He has over 45 published articles in NDE, and has co-authored one book with Dr. Bray. He has consulted for several law firms in tubular inspection matters, as well as various oil companies, and the Ocean Drilling Program.
 
(Voice) 713-690-8432, (Fax) 713-690-8433;
rkstanley@brayengr.com

 

   
  • Magnetic NDE
  • Tubing inspection 
     
 

     Dr. Clarence L. Hough, Jr. has been performing engineering experiments for almost four decades. He has a B.S. in Mechanical Engineering and started his career as a Mechanical Test Engineer conducting functional and structural tests on helicopters. After obtaining a Ph.D. in Industrial Engineering, he began to apply the principles of Statistical Design of Experiments (DOE) in his research, teaching and advising. During the last two decades in the Mechanical Engineering Department at Texas A&M, Dr. Hough has conducted research in manufacturing, rock drilling, instrumentation and other topics using these DOE principles (the basis for Robust Design and Taguchi methods). He has regularly taught senior and graduate courses in engineering experimentation, supervised Ph.D., Masters and undergraduate experimentation projects and guided other professors and their students on matters involving designed experiments. Dr. Hough served as a consultant for National Institute of Standards and Technology evaluating invention disclosures. He has recently colaborated on designing and analyzing experiments to evaluate new NDE applications with Dr. Don Bray.
 
(Voice) 979-775-5377;
mihough@brayengr.com

 

   
  • Analysis of engineering data
  • Design of experiments 
     
 

     Dr. Harry A. Hogan earned the Ph.D. in Mechanical Engineering from Texas A&M University in 1984. He also received degrees in Biomedical Engineering (B.S., 1979; M.S. 1981) and Mechanical Engineering (B.S., 1979) from Louisiana Tech University. He has served on the faculty of the Department of Mechanical Engineering at Texas A&M University since 1986. Dr. Hogan's research interests have encompassed finite element modeling, composite materials, and biomechanics. He regularly teaches courses in the areas of stress analysis, design, and finite element modeling. He is a registered Professional Engineer and a member of ASME, the American Academy of Mechanics, and numerous other professional organizations. Dr. Hogan's consulting experience has focussed primarily upon finite element modeling in failure analysis and design. Some samples of recent consulting activity include:

(1) Drill String Failure (well blowout buckled and ejected string; non-linear finite element analysis employed (ANSYS); beam elements with contact and large displacements),

(2) Modular Apartment Buildings (used combined beam, bar, and plate elements to model floor, roof, and wall constructions (ANSYS); compared different construction methods for various wind and floor loading scenarios; assessed damaged units and modeled different repair options),

(3) Laminated Optical Lens (finite element modeling of laminated polymer lens for indoor commercial office lighting (ANSYS); global/local analysis of adhesive failure and localized stress concentrations; thermal loads dominant with geometric distortion a main concern; comparison of design alternatives for new generation systems),

(4) Piston Rod Fracture Analysis (finite element modeling of piston rod fracture for large diesel engine (ABAQUS & FEMAP); both 2-D and fully 3-D modeling employed; stress distributions evaluated near keyway in hub connecting to crankshaft; shell bearing required modeling multiple contact surfaces; highly non-linear due to contact surfaces and friction), and

(5) Automotive Seal Design (finite element modeling of radial lip seals for automatic transmissions (ABAQUS); compared various designs for lip profile and sealing pressures; evaluated old designs and also assessed several new alternative designs being considered; elastomer materials required highly non-linear material modeling; incremental load application and material model evaluation).

 
hahogan@cox-internet.com

   
  • Finite Element Analysis
  • Composite Materials
  • Biomechanics