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District
F
Abstracts From the 2006 Early
Career Technical Conference (ECTC)
October 6-7,
2006 - Jackson, Mississippi
ABSTRACTS/Biosketch
Structural Properties Of A Hydrogen
Fuel Cell In An Automotive Collision
Matthew
L. Blackwood, Beth A. Todd
University
of Alabama |
| Abstract: Current
concerns about oil have created interest in hydrogen fuel cells. To
be an effective transportation solution, the public must accept that
a hydrogen fuel cell is safe and reliable under real world conditions.
In this project finite element models of fuel cell components have
been used to investigate road vibrations and collisions. Mode shape
analysis in ANSYS and the dynamic capabilities of LS-DYNA have been
used to determine failure points of a fuel cell. Experiments have determined
conditions of a fuel cell leak. Fuel cells must be supported well at
each endplate to prevent failure. |
| Presenter Biosketch: Matthew
Blackwood received his undergraduate degree in mechanical engineering
in December 2004 at the University of Alabama. He co-oped at Globe
Motors in Dothan, AL for three terms working in a support/quality group
of engineers and technicians. He has been involved in various collegiate
competitions including Formula SAE, Mini Baja, and Human Powered vehicle
competitions. His research area is in Finite Element Analysis (FEA)
of hydrogen fuel cells sponsored by the National Highway Traffic Safety
Administration (NHTSA). He is supported by his involvement in a middle
school science class as a fellow in the GK-12 program sponsored by
the National Science Foundation. He is currently planning on completing
his masters of science in mechanical engineering in December 2006. |
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Structural Evaluation Of Power
Plant Piping And Vessel Subjected To Flow Accelerated Corrosion
Manjunath
V. Pappur
Entergy
Operations, Inc |
| Abstract: Flow
Accelerated Corrosion (FAC) is one of the common degradation mechanisms
occurring in nuclear power plant piping and vessels. This mechanism
may potentially lead to failures causing a threat to personal, industrial,
or nuclear safety. This publication provides a systematic engineering
approach based on structural mechanics concept to assess the structural
integrity of the degraded piping or vessel. Every step is programmed
in MathCAD or Excel spreadsheet with the evaluation and much of the
logic functions being performed by the tool. Thus, the time for deciding
whether a particular piping or vessel satisfies the Code (ASME or
ANSI) acceptability can be established very quickly. |
|
Presenter Biosketch: Manjunath
Pappur has more than 4 years of professional experience in nuclear
power plant industry with a mechanical engineering background.
During his professional tenure, he has been involved with several
aspects of work ranging from Project Management to Operation & Maintenance
support of the power plant. He has managed projects upwards of
$1,000,000 including hiring and technical oversight of contract
engineering firms, laboratories and manufacturers, and interfacing
directly with multiple levels of plant and engineering management.
His expertise includes design of plant mechanical and piping systems,
design of bearings and lubrication systems, and thorough knowledge
of ASME and ANSI Codes for Boiler and Pressure Vessel. He is an
active member of ASME. He has published a technical paper in the
ASME Journal of Tribology. He has presented technical paper in
Proceedings of 2001 ASME IMECE and 2001 AFOSR/ONR/NSF Tribology
Conference. He is a registered Engineer Intern in the State of
Arkansas. Manjunath graduated in December 2001 from Louisiana State
University with a Master’s degree in Mechanical Engineering.
During his graduate program in Mechanical Engineering department
at LSU, he held several Research and Teaching Assistantship’s,
reviewed journal papers for ASME and STLE, and served as a summer
instructor.
|
Coupled Finite Element Line Model
For The Stress Analysis Of An Aircraft Engine Compressor
Dinesh
Immaneni, Joseph J. Rencis
University
of Arkansas |
| Abstract: A
new coupled line finite element model is proposed that can be used
to carry out a stress analysis of rotating parts. The rotating part
consists of a disk modeled with axisymmetric line elements and blades
modeled with axial line elements. The coupled finite element model
is used to carry out a stress analysis of an aircraft engine compressor.
The coupled model is compared to a solid ANSYS® finite element model
and the coupled model results yield first-order accuracy. The major
advantage of the coupled model over a three-dimensional model is
that an analysis can be carried out quickly in the early design stage. |
| Presenter Biosketch: Dinesh
Immaneni received his B.E in Mechanical (Production) Engineering
in 2004 from Osmania University, India. He is currently a graduate
student at Department of Mechanical Engineering, University of Arkansas.
His research area is in finite elements. He is currently working
on “Coupled finite element model for stress analysis of aircraft
engine compressor” for his master’s thesis. |
Design Of A Cost-Effective, Underactuated
Hand Prosthesis With Passive-Adaptive Power And Pinch Grasping
Capabilities
Salim
Nasser, Diana Rincon
Florida
International University |
| Abstract: This
paper presents the design and mechanical features of a cost-effective,
functional self-adaptive, multi fingered prosthetic hand that improves
upon current prosthetic hands. Commercially available hand prostheses,
though functional, have limitations such as weight, as result of
vast numbers of parts, intricate mechanisms requiring constant maintenance
as well as the extremely high cost to the user. The hands design
discussed is based on an underactuated 15 degree-of-freedom, 1-degree-of-actuation
configuration, fully capable of performing activities of daily living.
Each finger is designed to function independently from each other,
adapting to objects of any geometry and possessing the ability of
pick up smaller objects through pinching by means of a position adjustable
thumb. The system provides safe and reliable grasping without the
need for feed back sensors, multiple servos, or any type of data
processing. The design is focused towards providing upper limb amputees
with the option of a prosthetic hand that is cosmetically appealing
(anthropomorphic), functionally comparable with other prosthesis
of its type, while decreasing cost and weight issues by using an
approach that eliminates the need for complex electrical systems,
circuitry, and multiple servomotors while decreasing the number of
parts and cost of manufacturing. |
| Presenter Biosketch: Salim
Nasser graduated with a Master’s degree in the area of Mechanical
Engineering Design and Manufacturing from Florida International University,
where he also graduated Magna Cum Laude with a B.S. in Mechanical
Engineering. At both the gradate and undergraduate level, he has
received multiple recognitions and honors including the Master’s
Program and Undergraduate student of the year awards. His thesis
work involved the design and optimization of an anthropomorphic underactuated
hand prosthesis with passive-adaptive grasping capabilities for use
by upper-limb amputees. As a NASA Co-op for the Biomechanics Development
Branch at the Johnson Space Center, he worked on the Treadmill Vibration
Isolation System (TVIS) onboard the International Space Station.
As a research assistant in the Applied Dynamics & Control laboratory
he worked on integrated structural health management systems as applied
to UAV’s, in collaboration with the U.S. Air Force, as well
as in the areas of wheelchair biomechanics, wheelchair propulsion
design, and Bipedal humanoid robotics, having published over 10 technical
papers on all four topics. |
Quantitative Measurements Of Soot
In Steady And Pulsed Ethylene/Air Diffusion Flames Using Laser-Induced
Incandescence
Hayri
Sapmaz, Chaouki Ghenai
Florida
International University |
| Abstract: Laser-Induced
Incandescence (LII) is used in this study to measure soot volume
fractions in steady and flickering ethylene diffusion flames burning
at atmospheric pressure. A very-high-speed solenoid valve is used
to force the fuel flow rate with frequencies between 10 Hz and 200
Hz with the same mean fuel flow rate of steady flame. Periodic flame
flickers are captured by two-dimensional phase-locked emission and
LII images for eight phases (0 – 360) covering each period.
A comparison between the steady and pulsed flames results and the
effect of the oscillation frequency on soot volume fraction for the
pulsed flames are presented. |
| Presenter Biosketch: Hayri
Sapmaz is currently working as a Manufacturing Engineer for Goode
Consulting International (GCI). He was the principle individual who
established the Advanced Combustion Laboratory in Applied Research
Center (ARC) in 2001. He worked in ARC for the past 6 years doing
fundamental and applied research for developing clean and highly
efficient combustion systems. He has experience with laser diagnostics
techniques, such as, Laser-Induced Incandescence, Particle Image
Velocimetry (PIV), Micro-PIV, Laser-Induced Fluorescence, Shadowgraphy,
Flow Map Particle Sizing, Spectrometry, Extinction, Absorption, Rayleigh
Scattering, and RDG Scattering techniques. Along with his dissertation
work, he has been involved with various projects sponsored by the
National Science Foundation, the U.S. Air Force, and the U.S. Department
of Energy, such as, Supersonic Fuel Air Mixing in Cross flow, Non-Newtonian
fluid mixing in a waste tank, and Laser Energy Absorption, Scattering
and Transmittance in Biological Tissue. His areas of interest are
premixed and non-premixed combustion, pulse combustion, thermo fluids,
and heat and mass transfer. He is a member of ASME, AIAA, Tau Beta
Pi Engineering Honor Society, and USTA. Ph.D. in Mechanical Engineering,
Florida International University, May 2006. M.S. in Mechanical Engineering,
Florida International University, 2000. B.S. in Mechanical Engineering,
Middle East Technical University, 1998. |
An Inverse Method For The Determination
Of Full Field Stresses From Experimentally Measured Normal Strains
In Isotropic And Orthotropic Materials
Tae-Joong
Yu, Bhavani V. Sankar, Nagaraj K. Arakere, *Raj Vaidyanathan
University of Florida, *University of Central Florida |
| Abstract: Certain
diffraction based techniques that measure strains in bulk samples
are limited to a determination of normal strains. A numerical inverse
method is developed to determine full field stresses from such experimentally
determined normal strains, under plane-stress conditions based on
the equations of equilibrium and the constitutive relations. By applying
the finite difference method to the differential equations, substituting
in the equilibrium equations, and incorporating the least-squares
method, unknown functions in the formulation are determined. Example
problems are verified using analytical and computational approaches. |
| Presenter Biosketch: Tae-Joong
Yu received the bachelor degree in Mechanical Engineering from the
Kon-Kuk University in Seoul, Korea in 1998. He joined the Department
of Mechanical Engineering at the University of Florida in 1999. After
receiving his MS degree in 2002, he worked for a laser welding company
as a structural analysis engineer. He then returned to the University
of Florida to pursue his Ph.D. in Mechanical Engineering in 2003.
His current research focuses on the study of deformation in shape
memory alloys |
Virtual Rapid Robot Prototyping
Mehmet
Ismet Can Dede, Sabri Tosunoglu
Florida
International University |
| Abstract: Competition
in marketplace requires manufacturers to develop their products in
shorter turn-around times. This encourages engineers and researchers
to devise methodologies to respond to this market-driven requirement.
Rapid prototyping is one solution to produce a design in minimum
amount of time. In this paper we focus on rapid prototyping of robots.
For this purpose, development of the robot design starts with a computer-aided
design (CAD) model, system assembly, and simulation of the system
motion. It then progresses to the development of kinematic and dynamic
model simulations, and is completed by designing a controller for
the robot. This streamlined approach allows easy reiteration of the
design process at any stage; thus, it allows the designer to optimize
system parameters as much as possible. The rapid prototyping environment
presented in this work is developed by integrating the use of SolidWorks©,
Matlab© and a number of their modules, and demonstrated on an RP
manipulator. Although the process is applicable to the design of
any mechanical system, robots with their high degrees of freedom
are especially suitable for rapid prototyping. |
| Presenter Biosketch: Mehmet
Ismet Can Dede is a PhD Candidate at the Department of Mechanical
and Materials Engineering of Florida International University (FIU).
He graduated with a BSc degree from Department of Mechanical Engineering
of Istanbul Technical University specialized in Robotics and Control.
Later he completed his MSc studies at Department of Mechanical Engineering
of Middle East Technical University specialized in Robotics and Control.
He worked as a Mechatronics Design Engineer at Aselsan Inc., one
of the largest Defense Industry corporations in Turkey, for more
than three years. He has more than 20 technical publications. He
was the Organizing Committee Chair for Florida Conference on Recent
Advances in Robotics 2006, Miami. He is currently working as a TA
in Department of Mechanical and Materials Engineering of FIU. He
is also teaching ESI 3161 Industrial Applications of Microprocessors
course as a part of the FLAME program at FIU. He is a student member
of American Society of Mechanical Engineers, member of Delta Epsilon
Iota and Phi Beta Delta Honor Societies, and the president of Turkish
Student Association at FIU. |
CERBERUS: Development Of A Humanoid
Robot
Mehmet
Ismet Can Dede, Salim Nasser, Shusheng Ye, and Sabri
Tosunoglu
Florida
International University |
| Abstract: The
motive behind building humanoids is to design a robot that can duplicate
the complexities of human motion, decision making, be able to help
people and even accomplish tasks that cannot be carried out by humans.
Building humanoids has always attracted scientists throughout the
world but although the aim is seemingly simple, the task is never
easy. This paper briefly describes the final design and gait definitions
of the humanoid robot named Cerberus. Also, the manufacturing process
and hardware selection is presented and wireless communication capability
via remote control is explained. Software development for the Cerberus
humanoid robot as well as the initial tests conducted on the prototype
are addressed. The software package that is specifically developed
for this biped includes the capability to describe the robot’s
gait on the screen graphically by the click of a mouse, which is
then transparently converted into the P-Basic code to control the
servos. This approach significantly saves time and eases software
development in defining new gaits for the robot. Various gaits have
been developed and tested to assess the capabilities and limitations
of the robot. The key design feature of Cerberus is that it has minimal
amount of degrees-of-freedom to perform tasks such as moving forward
and backward, making turns in any direction, and walking in quadruped
or in biped configuration. |
| Presenter Biosketch: Mehmet
Ismet Can Dede is a PhD Candidate at the Department of Mechanical
and Materials Engineering of Florida International University (FIU).
He graduated with a BSc degree from Department of Mechanical Engineering
of Istanbul Technical University specialized in Robotics and Control.
Later he completed his MSc studies at Department of Mechanical Engineering
of Middle East Technical University specialized in Robotics and Control.
He worked as a Mechatronics Design Engineer at Aselsan Inc., one
of the largest Defense Industry corporations in Turkey, for more
than three years. He has more than 20 technical publications. He
was the Organizing Committee Chair for Florida Conference on Recent
Advances in Robotics 2006, Miami. He is currently working as a TA
in Department of Mechanical and Materials Engineering of FIU. He
is also teaching ESI 3161 Industrial Applications of Microprocessors
course as a part of the FLAME program at FIU. He is a student member
of American Society of Mechanical Engineers, member of Delta Epsilon
Iota and Phi Beta Delta Honor Societies, and the president of Turkish
Student Association at FIU. |
Validation Of Laser Profiling
Systems And Algorithms As Used In Accelerated Pavement Testing
Kyle
Dean Younger, James Fletcher*
Florida
Department of Transportation, University of North Florida |
| Abstract: The
Florida Department of Transportation (FDOT) employs a Heavy Vehicle
Simulator (HVS) as the primary equipment in its Accelerated Pavement
Testing (APT) program. Pavement performance is principally assessed
by its ability to resist permanent deformation (rutting) in the wheel
path. Traditional methods used to evaluate rutting include straight
edges and a variety of mechanical and rolling profilers which are
tedious and time consuming to operate. As a result, the FDOT equipped
the HVS with a modern, fully-automated laser-based profiling system
to collect height data, which is then compiled and analyzed to generate
an accurate profile of the pavement test surface. The current study
was initiated to evaluate the accuracy and repeatability of the results
generated by the laser profiling system. A verification procedure
was developed, including the design and fabrication of a test apparatus,
to systematically test the laser’s ability to measure height
differentials. Appropriate operating procedures were developed, tested,
and verified to ensure the required 0.5 mm tolerance required by
APT engineers was achieved. |
| Presenter Biosketch: Kyle
D. Younger is an undergraduate mechanical engineering student at
the University of Florida. At the University, he is a member of SAE,
ASME, FES and Pi Tau Sigma. He will graduate with Honors in December
2006. While studying at Florida he has worked for the Florida Department
of Transportation’s Pavement Research Section. The Florida
DOT has implemented an extensive Accelerated Pavement Testing Program
and utilizes a Heavy Vehicle Simulator (HVS) to apply real-life truck
loads to a test pavement. Kyle helps operate the HVS and is involved
in instrumentation installation, data collection and HVS maintenance.
He has worked extensively with the Data Acquisitions Systems on the
HVS and is currently working on a condition based maintenance program
to automatically identify potential problems. |
Mechanical-Electrochemical Theory
Of Defects In Ionic Solids
Narasimhan
Swamimathan, Jianmin Qu
Georgia
Institute of Technology |
| Abstract: Charged
point defects diffuse through ionic solids under electrochemical
driving forces. Such a diffusion process can be affected by mechanical
stresses in the solid. Non-stoichiometry during diffusion can cause
volumetric strains which result in mechanical stresses due to mechanical
constraint, or due to non-uniform distribution. We develop a framework
to account for the coupling between mechanical stresses and diffusion
of charged defects in ionic solids. The framework consists of a system
of nonlinear differential/algebraic equations governing the defect
concentrations, electrostatic potential and the mechanical stresses.
Further, we solve a simple 1-D problem to examine the extent of diffusion-stress
interaction. |
| Presenter Biosketch: Narasimhan
Swaminathan is a PhD student at Georgia Institute of Technology working
with Dr. Jianmin Qu since the spring of 2004. He completed his bachelors
in Mechanical Engineering from university of Madras in 2001 and completed
his masters from Michigan State University in the fall of 2003. Currently
his area of research lies in the modeling interaction between mechanics
and solid state diffusion, which is also his PhD thesis. He is also
interested in solid state electrochemistry, solid oxide fuel cells
and molecular dynamics simulation of ionic materials. He has one
journal publication and 2 conference papers to his credit. |
Control Of Nonlinear Stochastic
Systems: Model-Free Versus Classical Controllers
Vural
Aksakalli, Daniel Ursu
The
Johns Hopkins University |
| Abstract: Classical
linear controllers are widely used in the control of nonlinear
stochastic systems and thus there is concern about the ability
of the controller to adequately regulate the system. An alternative
approach to cope with such systems is to avoid the need to build
the traditional “open-loop” model for the system. Through
the avoidance of model, controllers can be built for arbitrarily
complex nonlinear systems via neural-networks (NN’s) trained
by simultaneous perturbation stochastic approximation (SPSA) so
that only the output error (between the plant and target outputs)
is needed. We discuss basic characteristics and limitations of
both approaches and establish a framework for comparing the two
in the control of nonlinear stochastic systems. We formally analyze
this comparison in the case of linear quadratic controllers (LQR)
and illustrate the comparison numerically on a simulated nonstationary
multiple input, multiple output wastewater treatment system with
stochastic effects. To the best of our knowledge, a comparison
of the model-free approach to classical methods of control has
not been done before. |
| Presenter Biosketch: Daniel
Ursu received his BS in Biomedical Engineering/Mechanical Engineering
from Johns Hopkins University in 2005. He is currently an MS student
in the discipline of Robotics at Johns Hopkins. His interests include
medical robotics, nonlinear control systems and biomimetic robots.
He is a member of IEEE and ASME and has published two papers; one
in the field of micro-fluidics and the other in urology. His future
ambitions are pursuing an MD-PhD in medical robotics and urology. |
Cooling Of A Power Amplifier
Array Using Copper Nano Particles And Zigzag Fins
K.
Gupta, A. L. Jeswani and J. A. Roux
University
of Mississippi |
| Abstract: Continuing
miniaturization and the required increase in the performance of
electronic devices has made thermal management significant to keep
electronics operating below their failure temperature. Two approaches,
suspension of copper nanoparticles in water and zigzag fins in
the cooling channel, were employed to achieve significant thermal
management of an electronics array. The objective is to keep the
maximum temperature of the power amplifier chips below the failure
temperature (150 C). Simulations were performed at desert condition
(52 C), flow rate of Re = 7650 and for different thermal power
dissipation levels employing IcePak (CFD electronics cooling software
package). |
| Presenter Biosketch: Kapil
Gupta has BS degree in automotive engineering and MS degree in
mechanical engineering with emphasis towards thermal and fluid
sciences, design optimization and solid modeling. During his graduate
studies at Olemiss he worked on a project titled "Electronic
Cooling of Power Amplifier Array Using Nanofluid or Zigzag Fins" related
to cooling of electro-mechanical devices and was guided by Dr.
Jeffrey A. Roux. Throughout his MS program he was ranked among
the top 2% of students. He had presented a poster at Sigma Xi poster
symposium. He is member of ASME. He has been a Senator of graduate
students at mechanical engineering department and served as Vice-President
of Indian Student Association at University of Mississippi. Recently
he finished his graduate studies (MS) and is now looking for a
job as a Mechanical Design Engineer. |
NDE Of Adhesive Bonded Joints
Using Vibration And EIS Techniques
Ravi
Zalani, Manoj Anakapalli, P. Raju Mantena and Ahmed
Al-Ostaz
University
of Mississippi |
| Abstract: In
this work, Electrochemical Impedance Spectroscopy (EIS) and Impulse
Frequency Response Vibration Techniques have been used to non-destructively
evaluate the effects of moisture ingression and temperature variation
on adhesive bonded joints. A range of acrylic foam and high performance
adhesive transfer tapes were used to bond aluminum 2024 T-4 adherends
in single-lap joint (SLJ) configuration. Different levels of debond
were induced at the joint interface of SLJ specimens using mold
release agent- Fibre Glast of Developments Corporation. The sensitivity
of EIS (resistance, capacitance and impedance) and vibration response
(resonant frequency and damping) techniques for detecting induced
defects was evaluated. Also, effect of curing age of adhesive on
EIS parameters was studied using equivalent circuit. |
| Presenter Biosketch: Ravi
Zalani has six years of working and research experience in Automotive
Industry. Presently he is pursuing his masters in mechanical engineering
at University of Mississippi-Oxford as a research assistant. An
Indian citizen by birth, he has completed his B. E. in Mechanical
Engineering from India in 2000. His areas of interests are polymers,
NDE Techniques and automotives. His present research is in studying
the viscoelastic behavior of Carbon nano tube reinforced Polymers.
He had been awarded the best dealer’s award by Escorts Ltd.
in 2003. As an active member of Lions Club and Saurabh blood bank,
he has organized many medical camps. A fellow member of ASME, he
his on the path of learning technical skills to serve human kind
for a better tomorrow. |
The Effect Of Tropicalization
On Steam Generator Blowdown System Design For Standardized Nuclear
Power Plant Design
Andy
D. Huffman
AREVA
NP Inc. |
| Abstract: The
EPR, a standardized nuclear power plant design, was developed for
deployment throughout the world. As a result of being engineered
and constructed simultaneously, the standardized design was based
on northern European climate conditions. However, an unforeseen
effect on steam generator blowdown system was discovered when the
standardized design was in development for tropical sites. Possible
solutions to the issue are examined and addressed in this paper.
A commercial heat balance program is used to model and examine
the results of possible scenarios. The results are used to improve
the standardized design for nuclear power plants located in tropical
sites. |
| Presenter Biosketch: After
graduating from the University of North Carolina at Charlotte with
a Bachelors Degree in Mechanical Engineering, Mr. Huffman joined
AREVA NP Inc. (Formerly Framatome ANP, Inc.) in 2003 and now works
in New Plant Engineering Plant Design Engineering. While working
full time, he completed the requirements for a Masters Degree in
Mechanical Engineering, and has begun studies which will lead to
a Ph.D in Mechanical Engineering. His focus will be computer modeling
and simulation, specifically in thermal fluids engineering. He
is currently engaged in Conventional Island Systems engineering
for the EPR, a Generation 3+ Nuclear Power Plant. Mr. Huffman was
named as the 2006 Engineer of the Year for AREVA NP, Inc. and is
a Co-Chair of the Charlotte Chapter of North American Young Generation
in Nuclear (NA-YGN). He is a member of ASME, ANS and ASPE professional
societies, and a member of Tau Beta Pi, Golden Key and Phi Theta
Kappa honor societies. He is a frequent volunteer with United Way,
Habitat for Humanity, North Carolina Baptist Men and The Boy Scouts
of America. Mr. Huffman and his wife have three children; ages
6 and 2. He and his family reside in Charlotte, NC. |
The Effects Of Water Droplet
Oscillations On The Scavenging Of Micron-Sized Particles
Raymond
E. McDonnell III, J. R. Saylor
Clemson
University |
| Abstract: It
has been hypothesized that drop oscillations and vortex shedding
within the droplet wake affect the scavenging of particles. However,
no conclusive results have been presented on the effect these phenomena
might have on particle scavenging. To address this need, experiments
were conducted using oscillating water drops and water drops damped
by the addition of glycerol. The scavenging efficiencies were measured
for millimeter-sized droplets scavenging micron-sized particles.
These results show that E is increased by drop oscillations where
the particle diameter is large, but E is decreased by these oscillations
when the particle diameter is small. |
| Presenter Biosketch: Raymond
McDonnell III received his Bachelor of Science degree from The
University of Tennessee, Knoxville (UTK) in spring `04. While at
UTK, he worked for 1.5 years as a Research Assistant for the Combustion
Research Laboratory researching NOX absorbing catalysts with support
from The Department of Energy. He served as Vice-President for
the Pi Tau Sigma honors society, received 5 departmental scholarships,
and received the Boeing Corporation Academic Research Scholarship.
He then accepted an assistantship with the Interfacial Hydrodynamics
Research group of Clemson University, working for 2 years on research
to improve the efficiency of liquid droplets in collecting particles
of micron diameters. This research was supported by the South Carolina
Space Grant Consortium and the National Science Foundation. The
results of this research are the subject of his conference paper.
He has been accepted into the Omicron Delta Kappa National Leadership
Honors Society; the Phi Sigma Theta National Honors Society, and
The National Chancellor’s List `06. He currently works on
armature pole cores and pulleys for the Starter and Alternator
division of Denso Manufacturing Tennessee and is a member of ASME
and AHSRAE. |
Quasi-Steady Numerical Modeling
Of Friction Stir Welding
Satish
Perivilli, John Peddieson, Jie Cui
Tennessee
Technological University |
| Abstract: The
objective of the current study is to formulate quasi-steady models
of heat transfer in Friction Stir Welding (FSW) using Fluent 6.2.
The heating responsible for the weld is treated as a function of
the work piece material’s yield stress and melting temperature.
A simplified “pin only” configuration is used to evaluate
an effective yield stress and three pertinent configurations were
considered. It is shown that the partial and full penetration models
predict similar maximum temperatures, while the self reacting model
predicts a higher value. Overall the numerical model accurately
predicts the temperature distributions for different FSW configurations. |
| Presenter Biosketch: Satish
Perivilli is a Ph.D. student in Mechanical Engineering at Tennessee
Technological University and is currently working on “Quasi-steady
Modeling of Friction Stir Welding” for his dissertation.
He graduated from Tennessee Tech. with a Master’s degree
in Mechanical Engineering in 2003. He worked on the “Study
of Temperature Distributions in a Friction Stir Weld using Finite
Element Analysis” for his Master’s thesis. |
Numerical Simulations On Aerodynamic
Drag Of Ground Transportation System (GTS) Model
Manish
P. Sitlani and Kendrick Aung
Lamar
University |
| Abstract: The
aerodynamic drag characteristics of a heavy-duty truck with two
configurations, a tractor and a single trailer, and a tractor and
two trailers, have been studied. The basic geometry used is a 1:8
scale Ground Transportation System. The CFD software STAR-CD from
CD-adapco together with an expert tool, es-aero, was used for all
the analyses. The effect of vehicle geometry, frontal shape, vehicle
speed, gap size and boat-tail plates were investigated and drag
coefficients were computed. The feasibility of Reynolds-Average
Navier-Stokes standard k-e and RNG k-e turbulence models in predicting
the aerodynamic drag was evaluated over the range of Reynolds numbers. |
| Presenter Biosketch: Ravi
Zalani has six years of working and research experience in Automotive
Industry. Presently he is pursuing his masters in mechanical engineering
at University of Mississippi-Oxford as a research assistant. An
Indian citizen by birth, he has completed his B. E. in Mechanical
Engineering from India in 2000. His areas of interests are polymers,
NDE Techniques and automotives. His present research is in studying
the viscoelastic behavior of Carbon nano tube reinforced Polymers.
He had been awarded the best dealer’s award by Escorts Ltd.
in 2003. As an active member of Lions Club and Saurabh blood bank,
he has organized many medical camps. A fellow member of ASME, he
his on the path of learning technical skills to serve human kind
for a better tomorrow. |
Haptic Augmented Freeform Solid
Modeling System Based On Swept Differential Equation
Xiaobo
Peng
Prairie
View A&M University |
| Abstract: This
paper presents the development of a Virtual Sculpting system and
addresses the issues of interactive freeform solid modeling augmented
with haptic interface. A virtual reality (VR) approach is taken
to make the use of modeling tools more intuitive and interactive.
Our virtual sculpting method is based on the metaphor of carving
a solid block into a 3D freeform object. Geometric modeling, haptic
rendering and graphic rendering modules are integrated into the
system. In order to understand the performance of the system, the
computational complexity due to various parameters is analyzed. |
| Presenter Biosketch: Dr.
Xiaobo Peng has been an Assistant Professor in Mechanical Engineering
Department at Prairie View A&M University, Texas since 2005.
His research interests include CAD/CAM, geometric and solid modeling,
virtual reality, virtual product design, and collaborative design.
He received his PhD in mechanical engineering from University of
Missouri-Rolla. He received his MS in mechanical engineering in
2000 and BS in mechanical engineering in 1998, both from Tsinghua
University, China. Dr. Peng is the member of the honor societies
of Sigma Xi, ASME and IEEE. |
Numerical Analysis Of Fingertip
Temperature In Response To Reactive Hyperemia
Chinmay
Deshpande, Obdulia Ley
Texas
A&M University |
| Abstract: The
main objective of this work is to create a clear relationship between
vascular reactivity and changes in fingertip temperature during
arterial occlusion and subsequent hyperemia. Fingertip temperature
variation in response to vascular reactivity is an indirect measurement
of endothelial function and hence vascular health [1]. Analysis
of the relationship between blood flow and temperature, will allow
us to quantify and characterize vascular response. In this regard,
a parametric study with the help of a lumped model analysis using
Matlab was carried out followed by a simplified 2D model analysis
of a human finger using COMSOL Multiphysics 3.2. It is observed
that, the zero-order and first order thermal models were successfully
able to reproduce the temperature response observed at the fingertip.
The parametric studies performed, served to separate the contribution
of environment and blood flow over the temperature curves measured
during brachial artery occlusion. Future research will involve,
model validation using statistical analysis of parameter variation
in human volunteers. |
| Presenter Biosketch: Chinmay
Deshpande is pursuing his Master of Science in Mechanical Engineering
from Texas A&M University. He is working in Bioheat Transfer
Lab under the guidance of Dr. Obdulia Ley. His research involves
thermal modeling of the human finger for analysing Vascular Reactivity.
He has completed his undergraduation from Vishwakarma Institute
of Technology, India with distinction. |
Thermal Compact Model For Electronics
Packages
Suresh
Nikalaje1, Dereje Agonafer
University
of Texas at Arlington |
| Abstract: Over
the last few years an impressive amount of progress has been achieved
in the field of thermal compact modeling of chip packages, which
reduces the modeling and simulation time as well as the memory
requirement of the computer. Most of the models are created using
commercial CFD based software tools. This research paper focuses
on simple and straight forward method of thermal compact modeling
of electronics packages using parametric modeling software Pro-E
and finite element tool Ansys Workbench. A detailed methodology
of modeling and simulation for the multiple die packages is described
and implemented for the baseline study. |
|
Presenter Biosketch: Suresh
Nikalaje graduated from The University of Texas at Arlington
in Summer 2006. During his studies at UTA he worked on various
projects related to the field of CAD/CAM/CAE and Thermal Management
of Microelectronics Packages. He is a member of ASME and is willing
to pursue his carrier as FEA analyst. |
Bond Graph Based Generic Modeling
Of Design Configurations
Zhaohong
Wu, Matthew I. Campbell, Benito R. Fernandez
University
of Texas at Austin |
| Abstract: In
this paper, automated modeling of design configurations is introduced
through a design representation called CD-Graph and generic models
of various components. CD Graphs record the coupling formats in
which not only physical components are assembled topologically,
but also their generic models. A generic component model can accommodate
various types of coupling between this component and its environment.
Coordinate transformation between the body frame and a reference
frame of a component is integrated into the bond graph representation
of that component’s generic model, which provides a fundamental
convenience to modeling the couplers and thus to generating the
system model. An example for system model generation is shown in
the end. |
| Presenter Biosketch: Mr.
Zhaohong Wu is a PhD candidate in Mechanical Engineering at the
University of Texas at Austin. He received his Master’s and
Bachelor degree from Beijing University of Aeronautics and Astronautics
in 2000 and 1997 respectively. His PhD research topic is on optimal
design of dynamic systems (ODDS) through automated modeling and
grammar rule based evolutionary design. He has more than 10 technical
publications. |
Structural Optimization Using
FEMLAB And Smooth Support Vector Regression
Divija
Odapally, Bo Ping Wang, Yuh-Jye Lee*
University
of Texas at Arlington, *National Taiwan University
of Science and Technology |
| Abstract: Support
vector machine (SVM) has been emerging as a popular tool for function
approximation. In this paper, smooth support vector regression
(SSVR) is used to build a metamodel for structural optimization.
The proposed research work uses Quasi Monte Carlo (QMC) technique
for the selection of training data in the design space. SSVR using
a radial basis function (RBF) kernel is used to build the metamodel
for structural optimization. The structural responses are evaluated
by a commercial finite element package, FEMLAB (recently renamed
as COMSOL). |
| Presenter Biosketch: Divija
Odapally finished her Master of Science in Mechanical Engineering
from the University of Texas at Arlington during May 2006. She
is currently working as Mechanical Engineer in Analytical Technology
Group at Shaw Stone and Webster in Houston. Divija is a member
of the American Society of Mechanical Engineers and the Society
of Women Engineers. She has a key note presentation at the World
Conference of Computational Mechanics conducted in California and
a couple of presentations at National level Symposiums in India.
She is interested in further research and career in the field of
Finite Element Analysis. |
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