Dr. C. B. Sobhan Professor , Department of Mechanical Engineering and School of Nano Science and Technology National Institute of Technology Calicut , India Affiliate Faculty G W Woodruff School of Mechanical Engineering Georgia Institute of Technology Atlanta, Georgia, USA

What is Mechanical Engineering? What will you learn? Streams in Mechanical Engineering Related Areas Basic Subjects Advanced Subjects Applied and Special Topics Practical Study Production and Industrial Engineering Brief view of Some Subjects Sub-disciplines Career Prospects and Higher Study Options

It is one of the oldest and broadest of Engineering branches.

Applies the principles of Physics and Materials Science for conceptual design, production and maintenance of Mechanical Systems

Analyzes, Designs and Synthesizes Mechanical Processes.

Oriented towards Industrial Applications and Research

The fundamental principles To analyze existing mechanisms To use the knowledge to propose and design

new systems appropriate for specific end uses or applications.

To forecast the performance of what is going to be constructed

To bring up optimal designs, while conserving energy and resources

To fabricate and maintain mechanical systems or the mechanical components of interactive systems.

“The scientist seeks to understand what is; the engineer seeks to create what

never was” ….. Theodore von Kármán (Austrian-American Aeronautical Engineer and Scientist, 1881-1963)

Mechanical engineers apply the principles of mechanics and energy, and make machines, engines and devices.

DE P TH DESIGN PRODUCTION THERMAL

Machinery Machine Design Systems Design

Manufacturing Processes Materials Industrial Engineering Optimization Management

Fluids and Fluid Systems Heat and Heat Engineering Thermal Phenomena

Basic Needs: Physics, Mathematics, Graphics, and IMAGINATION..!

Production Engineering

Industrial Engineering

Automobile Engineering

Metallurgy

Aerospace Engineering

Ship Technology

Chemical Engineering

Textile Technology

Ceramic Engineering

Some of these which were earlier part of Mechanical Engineering have grown into separate branches of studies

Mathematics: In the Engineering B.Tech. curriculum, you study Mathematics equivalent to the M.Sc (Mathematics) level. Calculus is the most important topic.

Graphics (Engineering Drawing) the language of the Engineer. In Mechanical Engineering you do a lot of Machine Drawing too.

Fundamentals of Mechanics is required for all Branches of Engineering.

Mechanical Engineering is built around Applied Physics. Basic courses in Physics and Chemistry are part of the curriculum.

Mechanics of Solids Mechanics of Fluids Thermodynamics Heat and MassTransfer Materials Science Principles of Management

In the Production Engineering Branch, compared to Mechanical Engineering, more emphasis is given to Production Technology, Industrial Engineering and Management. Less focus on Thermal stream.

The basic subjects are the same in both branches.

Advanced Solid Mechanics Machinery: Kinematics and Dynamics Design and Analysis of Machine Elements

Manufacturing Processes Production Technology (Elaborated in Production Branch) Industrial Engineering and Management Materials Engineering and Metallurgy

Thermal Engineering: Steam Power Internal Combustion Engines and Automobiles Hydraulics and Trubomachinery Gas Turbines, Propulsion, Jet Engines, Aerospace Technology Advanced Fluid dynamics and Compressible/supersonic flows

Advanced Machining Methods Instrumentation and Measurement Refrigeration and Air conditioning Polymers, Ceramics, Composites Optimization Techniques Mechatronics Biomechanics Nanotechnology

Workshops: A taste of Various Manufacturing Methods such as Carpentry, Smithy, Welding, Foundry and Machining

Laboratory: Fluid Mechanics and Hydraulic Machines, Heat Transfer, Thermal Engineering, Production Technology, Instrumentation and Measurements, Computer Aided Design, Industrial Engineering

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Production engineering is a combination of manufacturing technology with management science. A production engineer typically has a wide knowledge of engineering practices and is aware of the management challenges related to production. The goal is to accomplish the production process in the smoothest, most-judicious and most-economic way.

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It integrates people into the design and development of systems,

thus requiring an understanding of the physical, physiological, psychological, and other characteristics

that govern and affect the performance of individuals and groups in working environments.

Engineering is a Teamwork

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Mechanics In the most general sense, it is

the study of forces and their

effect upon matter.

Mechanics is used to analyze and

predict the acceleration and

deformation of objects under

known forces (also called loads)

or stresses.

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Kinematics It is the study of the motion of

bodies and systems, while

ignoring the forces that cause the

motion.

Example: The movement of a

crane and the oscillations of a

piston in an engine

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Thermodynamics Engineering thermodynamics is

concerned with converting energy from one form to another.

Engines, for instance, convert the stored energy in molecules, into heat and then into mechanical work that eventually turns the wheels.

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Engineering Graphics

Drafting or technical drawing is the means by which mechanical engineers create instructions for manufacturing. Graphics is the language of the engineer.

Computer-Aided Drafting (CAD) programs allow the designer to create three dimensional drawings.

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Mechatronics It is an inter-disciplinary branch of

mechanical engineering, electronics engineering and software engineering that is concerned with integrating electronics and mechanical engineering to create hybrid systems. A good example is a CD-ROM drive.

Mechanical systems open and close the drive, spin the CD and move the laser

An optical system reads the data on the CD and converts it to bits.

Integrated software controls the process and communicates the contents of the CD to the computer.

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Robotics

It is the interdisciplinary area which manufactures robots, to perform tasks that they are trained to do. Robots may be of any shape and size. They are preprogrammed and interact physically with the world.

To create a robot, an engineer typically uses kinematics, mechanics, control systems and manufacturing techniques.

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It is a technology that produces miniaturized mechanical and electro-mechanical devices and structures that are made using the techniques of microfabrication.

Examples: MEMS accelerometers have displaced conventional accelerometers

for crash air-bag deployment systems in automobiles. Pressure sensors (in the medical sector) are disposable sensors used

to monitor blood pressure in IV lines of patients in intensive care. MEMS gyroscopes (i.e., rate sensors) have been developed for both

automobile and consumer electronics applications (Global position system sensors).

Sensors built into the fabric of an airplane wing so that it can sense and react to air flow by changing the wing surface resistance.

Optical switching devices that can switch light signals over different paths at 20-nanosecond switching speeds.

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Nanotechnology

It is the engineering of functional systems at the molecular scale. It focuses on tailor making materials and systems with desired properties by modifying the fundamental building blocks of matter, that is , molecules and atoms.

Example of Application of Nanotechnology in Engineering:

A medical device that travels through the human body to seek out and destroy small clusters of cancerous cells before they can spread.

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Mechanical and Production Engineers are needed in all

types of industries

Motivating factors:

Versatility

Job Security

Management Skills

Interdisciplinary Skills: Example: Medical/Bio-

Engineering , Nanotechnology, Robotics,

Instrumentation

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Industry: Almost all industries need

Mechanical Engineers

Consulting

Handle multi-disciplinary projects

Entrepreneurs

Broad knowledge base: more options, more

applications for creativity

Academia

Teaching , Research and Development

Career choices

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Masters Degree Programs Design Energy Engineering and Management Industrial Engineering and Management Manufacturing Technology Materials Science and Technology Thermal Science Other Interdisciplinary areas such as

Nanotechnology, MEMS, Robotics

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• Soichiro Honda Founded the Honda Motor Company

• Wright Brothers First practical airplane

• Leonardo da Vinci Tank, Helicopter, Sculpture, Art

Some Famous Mechanical Engineers

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• Henry Ford First affordable car

• Rudolf Diesel Rudolf Diesel was the inventor

of the diesel fueled engine.

• Ludwig Prandtl The Father of Modern Aerodynamics.

• A PJ Abdul Kalam

Best Wishes. Enjoy your studies..!

The Nanotechnology Group at NIT Calicut. School of Nano Science and Technology.

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In the Lab: The speaker with renowned Mechanical Engineer, Professor G. P. Bud Peterson, President, Georgia Institute of Technology, USA