Introduction to Mechanical Engineering

Dr. Rohit Singh Lather Associate Professor

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

-Theodore Von Karman

INTRODUCTION TO MECHANICAL ENGINEERING

•What is engineering ?

•What do mechanical engineers do ?

• The basic engineering process ?

WHAT IS AN ENGINEERING ?

Engineering is the profession in which knowledge of the mathematical and

natural sciences gained by study, experience, and practice is applied

with judgment to develop ways to utilize, economically, the materials and forces of nature

for the benefit of mankind

The Million Dollar Question WHY BE AN ENGINEER ?

WHY MIGHT YOU WANT TO BE AN ENGINEER?

• You have high goals in life

• Want to get a strong college education!

• You like math and sciences, and would like to apply them to real world

problems!

• You enjoy hands-on work and tinkering with things!

• You were told that engineers make a lot of money!

• You were told that you can get a good job with an engineering degree!

• You want to help humanity!

MECHANICAL ENGINEERING…....• Mechanical engineering is the second largest and one of the oldestdisciplines• You might find the subject both exciting and challenging• Almost every industry needs mechanical engineers• The curriculum is sufficiently broad so students can take variouscareer paths upon graduation• Perhaps the broadest of all the engineering disciplines• Finding creative solutions to difficult problems!• Working with motion, energy, forces, and materials• Concerned with analysis, design, manufacture and operation of

areas such as:

Energy/Defense/Environment/Health & Bio/Manufacturing/ Transportation

WHAT WILL YOU STUDY AS AN ME STUDENT ?

Human and Social Studies: arts, humanities, social sciences, ethics, law

Statics, Dynamics, Kinematics, Mechanics of solids and fluids

Thermodynamics, Heat Transfer, Internal Combustion Engines, Refrigeration

Materials: Materials engineering & processing

Machines: graphics, design, machine elements, controls, Machine Design, FEM

Economics: engineering economic analysis, cost engineering

Overall foundation: math, physics, chemistry, analysis skills, communication skills, computation skills

Electives: Automobile, Design, Industrial, Production, Renewable Energy

MECHANICAL ENGINEERING: TYPICAL PROGRAM

CoreFundamental courses of Mechanical Engineering

Mechanical Systems Vibrations, Controls, Mechatronics, MEMS

ElectivesDepartmental Electives &

Open Electives

WHAT MECHANICAL ENGINEERS DO ?

Work on Car Engines?

Make a Plane?

Work on a Computer?

Make a Robot? Build a Bridge?

Drive a Train?

DID WE MENTION ?

The salary of a mechanical engineer in India ranges from 2.2 L – 25 L Depending on the type of job Field

“There is a high economic return for an engineering degree even if a graduate works in a non engineering field”.

- From Neeta P. Fogg, Paul E. Harrington and Thomas F. Harrington College majors handbook with Real Career Paths and Payoffs: The Actual Jobs, Earnings and trends for Graduates of Sixty College majors, 2nd ed. (Indianapolis: JIST Publishing 2004

MECHANICAL ENGINEERING JOB DESCRIPTIONS

• Graduate Engineer Trainee • Graduate Management Trainee • Analytical Engineer• Design Engineer• Test Engineer• Manufacturing Engineer • Development Engineer • Research Engineer • Sales Engineer• Engineering Manager • Consulting Engineer

WHAT TYPE OF JOBS DO ME’S HAVE?

• Design

- Product Design, Machine Design, System Design

• Manufacturing

• Process Development & Quality

• Maintenance and Operations

• Research and Development

• Project Management

• Testing

• Sales or Technical Sales

• Management

• Electric power generation• Oil well drilling and extraction equipment• Renewable Energy – fuel cells, wind power, hydroelectric, nuclear, geothermal,

wind power, biomass, hydrogen, solar• Analysis

- Equipment failures to improve performance and reliability• Heat transfer, vibration, sound• Fabrication

- Coordinate fabrication of equipment- Develop improved fabrication techniques and methods

• Testing- Test quality, performance, safety, and reliability of products,

equipment, processes

• Research and Development• Sales

- Work as technical salespersons for companies that manufacture variousproducts and equipment

- Work as a general salesperson for companies• Maintenance and Operations

- Keep various plants and processes operating at optimum performance- Operations supervision and management

• Management• Other

- Law School,- Business School

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

MECH. ENG. TOP 10: ASME SURVEY 1. Automobile: High-power lightweight engines, efficient mass- manufacturing 2. Apollo: Saturn V launch vehicle (7.5 million pound thrust), command and service module,

lunar excursion module 3. Power generation: Conversion of stored energy into electricity, manipulation of

chemical-, kinetic, potential-, and nuclear- energy, large-scale power production 4. Agriculture mechanization: Powered tractors, mechanized harvesting, high-capacity

irrigation pumps, computerized crops management 5. Airplane: Propulsion (jet engines), lightweight materials, electromechanical control

systems 6. Integrated circuit mass production: IC manufacturing machines, alignment systems,

temperature- and vibration control, motors, bearings 7. Air-conditioning and refrigeration: Compressors, refrigerants, heat exchangers8. Computer-aided engineering technology: Computer-aided design, analysis,

manufacturing, virtual collaboratives9. Bioengineering: Imaging, prosthetics, minimally invasive surgery, tissue engineering10.Codes and standards: Interchangeability, interoperability, interconnectivity

WHAT CAN MECHANICAL ENGINEERS DO? Design (Product, Machine and System 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

THE ENGINEERING DESIGN PROCESS(CORE OF ENGINEERING)

Problem Identification Get with Customer or your

own idea

Conceptual DesignIdeas, Sketches and Solution

Lists

RefinementComputer Modeling, Data

Base Development

TestingAnalysis and Simulation of

All Design Aspects

PrototypingVisualizing and Improving

the Design

Communication Engineering Drawings,

Specifications

ProductionFinal Design, Manufacturing,

Distribution

CAEComputer Aided Engineering

Employers responding to NACE’s Survey rated these job qualities (a five point Scale in order of importance) in 2005

• Communication Skills (4.7/5 Average)

• Honesty / Integrity (4.5/5 Average )

• Interpersonal Skills (4.5/5 Average)

• Strong Work Ethics (4.5/5 Average )

• Team Work Skills (4.5/5 Average)

• Analytical Skills (4.4/5 Average)

Attributes employers seek on a candidate's

resume

WHO’S LOOKING TO HIRE AN ENGINEER ?

• 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• Environmental• Academia (Teaching) • Financial Companies• Pharmaceutical & Health Care• Biomedical• Sports Equipment Mfg.• Computer-Aided Design

• Automation• Robotics• Electronics Industries• Appliance Manufacturers • HVAC & Refrigeration • Toy Manufacturing• Furniture Manufacturing • Paper Industry• Food & Beverage Industry • Telecommunications• National Labs • Aeronautical• Government Agencies• Consulting Companies

“Coming together is a beginning; keeping together is progress; working together is a success.”

- Henry Ford