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;
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.
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
(Voice) 713-690-8432, (Fax) 713-690-8433;
- Tubing inspection
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.
of engineering data
- Design of
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:
String Failure (well blowout buckled and ejected string; non-linear
finite element analysis employed (ANSYS); beam elements with contact
and large displacements),
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
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),
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
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).
- Finite Element