The George W. Woodruff School of Mechanical Engineering at Georgia Tech.

The George W. Woodruff School of Mechanical

Engineering at

Georgia Tech

• My Background• Woodruff School Overview• Mechanical Engineering Overview• Student Activities

– Student Organizations– Academic and Work Opportunities

• Research• Senior Design Projects• Student and Alumni Profiles

Agenda

• Kristi Mehaffey– Allentown, PA

• BS Mechanical Engineering – Georgia Tech, 1994

• MS Mechanical Engineering – Clemson University, 2000

• Work Experience– 10 years of industry experience as a

Mechanical Engineer– Currently an Academic Advisor in the

Mechanical Engineering department at GT

Who I Am

• Making fun Halloween costumes

• Georgia Tech Football• My family• Travelling

What I Like

What is Mechanical Engineering?

Which one is something mechanical engineers do?a. Work at Coca-Cola and design bottling equipment to use for

bottling Coke.b. Work at NASA and be a part of designing the replacement for

the Space Shuttle, known as Project Constellation.c. Work at Michelin and design the next version of the air-less

tire. d. Work at Ford and help design the suspension on the next

generation Ford Mustang. e. Designing new wind turbines to turn wind capacity into

renewable energy. f. Performing tissue research to build an artificial blood vessel

that could be implemented into the human body.g. Work at a robotics company designing humanoid limbs.h. Design the largest ship, use to transport things like oil rigs.

Mechanical Engineering Is…


Much more than working with

cars!!!Even the best cars!

• Finding creative solutions to problems!• Perhaps the broadest of all the

engineering disciplines.• Working with motion, energy,

forces, and materials. • Concerned with analysis, design,

manufacture and operation of: – Energy– Defense– Environment– Health & Bio– Manufacturing– Transportation


SourceL: http://www.discoverengineering.org/Engineers/mech_engineering.asp

“Scientists discover the world that exists; engineers create the world that never was.”

-Theodore Von Karman

• Design– Product Design– Machine Design– System Design

• Manufacturing, Quality and Process Development

• Maintenance and Operations

• Research and Development

What are general things ME’s do?• Project

Management• Testing• Sales• Technical Sales• Other

– Law– Management– Business– Medical Schools

• Some Examples of Design– Machines that manufacture and package all varieties of

products – Rotating equipment - pumps, compressors, blowers,

turbomachinery – Internal combustion engines – Storage tanks, piping systems and pressure vessels - reactors,

heat exchangers, boilers – Sports equipment, consumer goods and products (everything

from golf balls to soda cans to roller coasters)– Material handling equipment - conveyers, robots, production

lines– Vehicles - cars, trucks, heavy equipment, buses, aircraft, ships– Electric power generation equipment– Oil well drilling and extraction equipment– Nearly every man made object that you can see has been

worked on by a Mechanical Engineer…

What can Mechanical Engineers do?

• Automotive & OEM Suppliers• Construction Equipment• Construction Companies • Ship & Railroad Companies• Airplane Manufacturing• Power Generation / Nuclear• Alternative Fuel / Energy • Utility Companies• Oil and Gas Companies• Chemical Companies • Pharmaceutical &Health Care• Biomedical • Sports Equipment Mfg.• Computer-Aided Design• Automation & Robotics

What Industries Hire ME’s?• Electronics Industries• Appliance Manufacturers• HVAC & Refrigeration• Toy Manufacturing• Furniture Manufacturing• Paper Industry• Food & Beverage Industry• Telecommunications• Amusement Parks• National Labs• Aeronautical (NASA, etc.)• Government Agencies• Academia (Teaching)• Financial Companies• Consulting Companies

My Background in Mechanical Engineering

• Ford– Manufacturing Engineer (robotics)– Production Supervisor

• Danfoss Fluid Power – Designed hydraulic spool valves

• BP Amoco– Reliability and Maintenance

Engineer

• CyOptics Inc.– Equipment Design– Product Design– Process Engineering

Woodruff School Overview

• Undergraduate – BSME: Mechanical Engineering– BSNRE: Nuclear & Radiological Engineering

• Masters– MSME: Mechanical Engineering– MSMP: Medical Physics– MSNE: Nuclear Engineering– MSBIOE: Bioengineering– MSPSE: Paper Science & Engineering

• Doctoral– Doctor of Philosophy (Ph.D.)

Woodruff School Degrees

Research in Mechanical Engineering

Mechanical EngineeringAreas of Research

• Acoustics and Dynamics• Automation and Mechatronics• Bioengineering• Computer Aided Design• Fluid Mechanics• Heat Transfer, Combustion and Energy Systems• Manufacturing• Mechanics of Materials• Microelectromechanical Systems (MEMS)• Nuclear and Radiological Engineering• Tribology

Mechanical Engineering ResearchENEMY DETECTION

• A new sensor that measures the motion created by sound waves under water could allow the U.S. Navy to develop compact arrays to detect the presence of enemy submarines.

• These compact arrays would detect quiet underwater targets, while providing very clear directional information.

• The novel underwater sensor uses optical fibers to detect the direction from which a sound is coming under water.

• This directional component is an important improvement over the current technology.

Mechanical Engineering ResearchACOUSTICAL STUDIES

• Healthcare Acoustics - The sound environment in hospitals and other medical facilities is complex and can impact occupants in a variety of ways. Some things that were evaluated:– improvement of acoustic measurement and characterization– psychological and physiological response of occupants– evaluation of acoustical treatments & noise mitigation strategies

• Speech Intelligibility - Speech intelligibility generally refers to how easy it is to understand speech in a built environment such as classrooms, recital halls, churches, etc. Three methods were used to calculate these metrics: – subjective performance on word list tests– measured room impulse responses– 3-D computer models

• Classroom Acoustics - The importance of good classroom acoustics has gained increasing visibility in the last several years.

Mechanical Engineering ResearchMATERIALS MAY SOON AID ORTHOPEDIC SURGERY

• Motivation – To develop devices that may soon improve the treatment of human orthopedic conditions.

• Details: – The research focuses on

‘shape-memory’ polymers and alloys; solid materials that can change shape on demand.

– Example: Knee Surgery. Surgeons drill tunnels in bone and then anchor tendons into those tunnels screw threads that often injure tissue. By contrast, the shape-memory polymer fits into a surgical tunnel along with the tendon, conforming around the delicate tendon to hold it in place.

Mechanical Engineering ResearchThe Development of a Kinematic Model for a

Rehabilitation Robot

• Patients will wear the robotic jacket and press a joystick in a prescribed way.

• The jacket's actuators will then be turned off, one by one, to see how the muscle movements change.

• This will isolate which muscles are most affected by the help of the jacket.

• Different muscle groups and levels of shakiness vary with each type of ailment.

• Ultimately the goal is to diagnose different neuromuscular ailments with this testing.

• There is currently no way to quantify how much a person with neuromuscular disorders shake. Shaking is the inability to modulate muscle patterns.

• Objective: Develop a quantifiable test for people with neuromuscular disorders.

Senior Design Projects

• Problem: Current fret board manufacturing process has ~25% scrap rate.

• Project Objective: Find a more reliable, faster and cheaper method to manufacture fret boards for guitars.

Senior Design – Case Study 1

• 12 Inch Radius• .070 Depth Cut• Multiple Scale

Lengths


• Results:– Removed 2 process steps from

the manufacturing process.– Designed and built prototype of

the newly designed machine.


• Project Objective: Design a better tool for doctors to use while inserting corrective measures.

• Background: Spinal deformities are common – Scoliosis, Hunchback, etc – The need for deformity correction

procedures exists, especially in extreme cases.


• The manufacturer’s design– Medtronic Sofamor Danek Cable Tensioner and Cable

Reduction Construct – Very cumbersome for the doctor to use


• Redesign of tool using Mechanical Advantage– Use gears to maintain linear

motion and reduce stress on hand


Senior Design – Case Study 3• Precision Immobilization Technique (PIT)

– PIT is the use of physical force from the police vehicle to the target vehicle with the intention to stop the target car

– Problems with PIT• Potential collision with bystanders• Potential Roll over of the target car

• Design Project Objectives– Prove the PIT maneuver does not cause

rollover when performed under the proper conditions

– Prove the PIT maneuver is a controllable when executed properly

– Compare both experimental and theoretical results

• Design and build an apparatus to experimentally measure the force applied from the police car onto the target car

• Model the PIT in MSC Adams Software


Load Cell

Clamp-on Collar

Flange Mount Shaft Support & Linear BearingsButton and Solid Shaft

• Designed load cell to measure force during test simulation• Load cell used to measure force on car Experiment Video

• PIT simulated in MSC Adams Car Simulation Software Theoretical Video

Car Type

Demo Vehicle

1998 Ford

Explorer

1998 Ford F150

1992 Ford

Taurus

1977 Ford E250

1988 Isuzu

Trooper

Grade %

Minimum Coefficient of FrictionRequired to Roll Over

0 1.74 1.07 1.18 1.39 1.08 0.96

8.7 1.65 0.97 1.09 1.30 0.99 0.87

18 1.54 0.88 0.99 1.19 0.89 0.77

• General Conclusions– Maneuver is safe, predictable and

controllable under the conditions used• Smooth flat road, wet and dry

conditions• Up to 120 mph with a low center-of-

gravity vehicle– High center-of-gravity vehicles are

more prone to rollover

Force Theoretical and Experimental

Results

Rollover Theoretical Results


Simulated Force vs. Time 45 mph

0

100

200

300

400

500

600

700

800

900

0 0.2 0.4 0.6 0.8 1 1.2

Time (sec)

Fo

rce

(lb

f)

Alumni Profiles

Alumni Profile• Shannon Kelly Spoon• BSME from GT in December, 2007• NAVSEA at the Norfolk Naval Shipyard in

Portsmouth, VA

Recent Job Assignments• Spent 3 weeks on the USS Ronald

Reagan installing and modifying their hydraulic systems

• Worked with a ship in Guam about se-curing their crane while it was in repair

• Worked with a ship had an elevator that came out of the tracks and the elevator was stuck a few stories up

Job Description • Works on hydraulics and auxiliary machinery on

aircraft carriers and amphibious assault ships. • Machinery includes: aircraft elevators, weapons

elevators, catapults, arresting gear, conveyor belts, the anchor windlass, and steering mechanisms.

Alumni Profile• Joshua Emrich• BSME in Summer 2005• Bell Helicopter in Texas

Job Description • Airframe designer for Armed

Reconnaissance Helicopter; • Designs the fuselage, tailboom,

and landing gear. • Use 3D CAD software (CATIA) to

build 3D models of helicopter parts.

• Specializes in a variety of parts including: carbon fiber, fiberglass, sheet metal, castings, forgings, and machined.

Best Parts of Job • Using creativity to solve

engineering problems. • I have a lot of control on

helicopter functionality, maintainability, and aesthetics.

• It is very rewarding to see the parts I design being installed on the helicopter.

Advice to Freshman• Work hard early on. • Co-op.• Don’t be afraid to change

majors.

Activities at Georgia Tech• Woodruff School Student Advisory

Board (President)• Freshman Activities Board • GT Swimming and Diving • Search Committee to find new ME

School Chair• ME School Undergraduate Curriculum

Committee. • Won a school spirit scholarship in my

junior year. • I would like to stress that I got

involved in my major more than the school (like school-wide spirit organizations) and that that worked out best for me.

Alumni Profile• Alison Skala, BSME Summer 2008• Works at Medtronics

Future Goals • MSME @ Stanford with

a focus in Biomechanics. • I want to invent a medical

device and start a company. • However, I plan to work with

a medical device company first.

Advice to Potential Students • You don’t have to know what you want to

do with the rest of your life when you're 17!

• Look into all your options and start out studying something as broad as you can (for example, I liked science and math and chose ME).

• If you want/need advice on a career choice, don't be afraid to ask someone to talk about what they do! You'll be surprised to see how nice people are if you are kind in return.

Undergraduate Research at GT I worked in a tissue engineering research lab on working towards building an artificial blood vessel that could be implemented into the human body. The first part was to understand the tissues that already exist in the body (in particular, collagen) and how the tissue grows and remodels under stress & change.

Alumni Profile• Chris, BSME ’06, • MSME from UC Berkeley in ‘08• eSolar in Pasadena, California

Project Engineer in the Advanced Technology R & D Group• You don’t have to know what you want to

do with the rest of your life when you're 17!

• Focus on optical and thermodynamic design and analysis

• I use the skills I gained in my mechanical engineering courses every single day at eSolar, whether it’s doing heat transfer and thermodynamic analyses, optical design, systems analysis, prototyping, or experiments.

• I tend to work on all aspects of the projects, from initial conception to final field

Future Plans • I plan to stay here for

several more years, seeing the projects I have helped create through to production.

• I would like to work abroad some more, potentially developing concentrating solar power projects in other countries around the world.

• Possibly obtain PhD.

http://www.esolar.com/solution.html

Our 2007-2010 Graduates Are At:

• Automotive :Ford, General Motors, Toyota, BMW, KIA, Honda, Elan Motorsports Tech.

• Energy, Oil, Gas:BP, BP Exploration (Alaska), Citgo, Schlumberger, Southern Company, Georgia Power, General Electric, Shell, Suez Energy North America, Scana, Westinghouse, Atlanta Gas & Light, Exxon-Mobil,

• Commercial & Consumer Products:

Cooper Industries, General Mills, Clorox Company, Frito Lay, International Paper, Lexmark, Procter & Gamble, Snap-On, National Instruments, Patterson Pumps, Kimberly Clark

• Transportation & Construction:John Deere, Caterpillar, Kubota Tractor Corporation, Norfolk Southern, Parsons

• Aerospace & DefenseNASA, Bell Helicopter, Lockheed Martin, Gulfstream Aerospace Corp, Rolls Royce, Northrop Grumman, Harris Corp, NAVSEA, Boeing, Advanced Armament Corp, NAVAIR

• BusinessErnst & Young LLP, Bank of America, CarMax, Deloitte and Touche

• Automation and RoboticsInnotec Automation, Rockwell Automation, Advanced Automation, Factory Automation, National Instruments

• Engineering Services & Consulting:

Dean Oliver International, McKenney's Mechanical Contractors, Patterson & Dewar, Babcock & Wilcox, Jordan & Skala Engineers Inc, O'Brien & Gere, Turner Construction, Slingshot Product Dev.

• HVACTrane, Underwood Air Systems, Carrier,

• Chemicals:Air Products, Air Liquide, Eastman Chemical Company, Dow Chemical,

• Environmental: Enercon Services Inc

• Military:Air Force, Navy, Marines, Army

Opportunities at Georgia Tech

Additional Opportunities• International Experiences

– Exchange Programs– Study Abroad Programs– International Program (degree designator)

• Professional Work Experiences– Co-op Program (degree designator)– Professional Internship Program

• Educational Experiences– BS/MS Program– Undergraduate Research– Minors and Certificates

• Summer Study Abroad in Metz, France• Summer Study Abroad in Oxford,

England• Summer Study Abroad in Shanghai,

China

Opportunities Abroad

Student Organizations

• GT Motorsports• GT Off Road (Mini-Baja)• Wreck Racing• Robo-Jackets• Solar Jackets

Student OrganizationsCompetitive

Student OrganizationsProfessional

• ME Organizations– American Society of Mechanical Engineers– Pi Tau Sigma (ME Honor Society)– Student Advisory Committee– Acoustical Society of America

• Other Popular Organizations– Mars Society at Georgia Tech– Echo Car Challenge– Engineering Students Without Borders – Society of Women Engineers– National Society of Black Engineers– National Society of Hispanic Engineers– Entrepreneur's Society– Students Organizing for Sustainability– Undergraduate Consulting Club– Many more….

Questions?

The George W. Woodruff School of Mechanical Engineering at Georgia Tech.

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