Namas Chandra Introduction to Mechanical engineering Chapter 1-1 EML 3004C CHAPTER 1 What is Engineering?

Namas Chandra Introduction to Mechanical engineering Chapter 1-2 EML 3004C Objectives Engineering as a career Relationship between engineer and other professionals Engineering Professional Organizations The foundations of engineering design: Knowledge, experience and intuition Sections 1.1Engineering has many fields 1.2 Professional Engineering Organizations 1.3The Engineer: Central to Project Management 1.4 Engineering: A set of skills

Namas Chandra Introduction to Mechanical engineering Chapter 1-3 EML 3004C What is Engineering? What does engineering mean to you? “The application of scientific knowledge to solve practical problems” “The bridge between pure science and practical application” “The application of scientific principles to provide goods to satisfy human needs” “Creative problem solving” “The use of technology to perform tasks” “The study of how to build things” “The study of how things work and how we can make them work better” “A scholarly, yet practical, study of the physical applications of human beings' technology combined with nature's laws” “A profession by which you utilize mathematical, scientific, and physical knowledge for the betterment of humankind” “Being creative and facing new challenges every day” The practical application of mathematics and science to create, design, improve and develop knowledge, products, technology and economy

Namas Chandra Introduction to Mechanical engineering Chapter 1-4 EML 3004C Engineers are classified based on the field of specialization. Traditional engineering programs are: Civil Engineering Chemical Engineering Electrical Engineering Industrial Engineering Mechanical Engineering Other engineering programs are: Aeronautical Engineering Nuclear Engineering Mining and Petroleum Engineering Agricultural Engineering Environmental Engineering Manufacturing Engineering Telecommunication Engineering Electronics Engineering Ocean Engineering/Naval Architecture Biomedical Engineering Computer Engineering

Namas Chandra Introduction to Mechanical engineering Chapter 1-5 EML 3004C Civil Engineering Civil Engineers design and construct national infrastructure. They plan, design, construct, operate and maintain Roads Bridges Buildings Airports Large Structures Water treatment facilities Waste management facilities Aquifers

Namas Chandra Introduction to Mechanical engineering Chapter 1-6 EML 3004C Chemical Engineering Chemical engineers develop large scale plants that produce products that are used in every day life. They plan, design, construct, operate and maintain complex systems that produce Petroleum products Building materials Plastics and polymers Oil and natural gas Biochemical products Building materials Fertilizers Cosmetics

Namas Chandra Introduction to Mechanical engineering Chapter 1-7 EML 3004C Electrical Engineering Electrical engineers are involved in anything electrical- electrical devices, systems and energy. They plan, design, construct, operate and maintain products that use electricity –virtually everything Television Computers Instruments Audio devices Communication devices- telephone, cell phone, fax Bank tellers All electrical machinery

Namas Chandra Introduction to Mechanical engineering Chapter 1-8 EML 3004C Industrial Engineering Industrial engineers device methods of manufacture to achieve optimal, reliable and cost effective products. They design, organize, operate and implement basic production methods and specialize in Manufacture Work design Human factors Management decision making Quality Control Facility Design Cost and work study Engineering Management

Namas Chandra Introduction to Mechanical engineering Chapter 1-9 EML 3004C Mechanical Engineering Mechanical engineers design, analyze, and develop, control and maintain machines, structures, devices and mechanical systems. This is the broadest discipline dealing with virtually all products Automobiles Jet engines Gas turbines Light/Heavy machinery Bicycles Fluids (also bio-fluid) Power plants Disk drives

Namas Chandra Introduction to Mechanical engineering Chapter 1-10 EML 3004C Mechanical Engineering Mechanical engineers cover a large number of technical fields. They include Solid Mechanics Fluid Mechanics Thermodynamics Vibration and control Mechanical Design

Namas Chandra Introduction to Mechanical engineering Chapter 1-11 EML 3004C Areas in Mechanical Engineering Solid Mechanics analyze the behavior of solid bodies subjected to stresses and external loads. They design machines, structures of cars, tanks, jets, trains, computers and disk drives. Fluid Mechanics study flow of fluids and gases in the design of pumps, fans, turbines and flow around planes and cars and in engines. Dynamics, vibration and control deal with bodies in motion, their stability and methods to control them. Mechanical Design translates an idea into useful product or service to meet the societal needs. Ultimately we are interested in developing devices and products.

Namas Chandra Introduction to Mechanical engineering Chapter 1-12 EML 3004C Courses in ME –first two years Our Course Pre-reqs

Namas Chandra Introduction to Mechanical engineering Chapter 1-13 EML 3004C Junior/Senior Years in M.E. Dynamics, control Fluid Mechanics Solid Mechanics Design

Namas Chandra Introduction to Mechanical engineering Chapter 1-14 EML 3004C Job Classification Among Engineers Research Engineer develops new products, design, and processes. This is applied research to ensure products are at leading edge. Design Engineer deals with all aspects of design process from concept, detailed drawing, materials, manufacture, and disposal. They also modify existing products based on changing needs or functionality Consulting Engineer works independently to perform a number of engineering services on contract basis, e.g. accident analysis Engineering Professor typically with a Ph. D. teach classes, conduct research and train M.S. and Ph. D. students. They do service through consulting, professional societies and governmental and educational boards.

Namas Chandra Introduction to Mechanical engineering Chapter 1-15 EML 3004C Transition from high school to college to engineering college  University is a different ball game from high school Higher standards are expected

Namas Chandra Introduction to Mechanical engineering Chapter 1-16 EML 3004C Transition from high school to college to engineering college  Need different skill sets at university Study skills/strategies Attitudes Communication Skills Time Management techniques  Professors assume that you have the requisite background and skill Take off from Day 1 Very little time to catch up Semester is too short Homework/Tests start from very beginning and affect the grade Excuses are rarely accepted (Responsibility is yours) Grading is based on relative performance (much talented students with tough competition)

Namas Chandra Introduction to Mechanical engineering Chapter 1-17 EML 3004C Professional Organizations  Professional Societies bring members with similar background, training and expertise. They Conduct Meetings/Conferences/Workshops Publish Journals/articles after a peer-review process Set self-regulating boards with standards and codes Provide job networks and product information. OrganizationAbbreviati on Starting Year Strength Aeronatics and Astronatuics AIAA196331,000 ChemicalAIChE190857,000 CivilASCE ,000 ComputerACM194780,000 ElectricalIEEE ,000 IndustrialIEE194824,000 MechanicalASME ,000

Namas Chandra Introduction to Mechanical engineering Chapter 1-18 EML 3004C M.E. Professional Societies OrganizationAddress American Astronautical Societywww.aas.org American Institute of Aeronautics and Astronautics American Society of Testing and Materials American Soecity of Heating, Referigeration, and Air-Conditionaing Engineers American Society of Mechanical Engineers Society of Automotive Engineerswww.sae.org Society of Manufacturing Engineerswww.sme.org Materials Research Societywww.mrs.org The Materials, Minerals and Metallurgical Society

Namas Chandra Introduction to Mechanical engineering Chapter 1-19 EML 3004C Engineers-Central to a Project Team  Engineers do not work in isolation. They are part of a much larger team.

Namas Chandra Introduction to Mechanical engineering Chapter 1-20 EML 3004C Engineers-Central to a Project Team  Engineers do not work in isolation. They are part of a much larger team. Team may comprise Other Mechanical engineers Engineers from different disciplines Scientists (Physicists, Chemists, Mathematicians) Completely diverse backgrounds like  Marketing Staff  Fabricators  Technicians  Financial analysts  Company executives  Lawyers  Should function effectively through Communication Speaking different languages Personality trait

Namas Chandra Introduction to Mechanical engineering Chapter 1-21 EML 3004C Engineering: A set of skills  To be a good engineer, you need to excel in Theoretical Practical Technical aspects and be a good Organizer Communicator  You achieve these expertise thorough Knowledge Expertise Intuition

Namas Chandra Introduction to Mechanical engineering Chapter 1-22 EML 3004C Knowledge in Engineering  Knowledge is the essence of body of facts Scientific Principle Mathematical/Computational tools  Universities disseminates knowledge through formal education.  For engineers formal knowledge is Natural Sciences: Mathematics, Physics, Chemistry and Biology  Formal engineering courses impart knowledge in Mechanics Materials Circuits Computer Programming Engineers NEVER stop to acquire knowledge. On-the-job training, courses, continuing education, technical meetings are a must for keeping abreast and staying alive.

Namas Chandra Introduction to Mechanical engineering Chapter 1-23 EML 3004C Engineering: Experience  To an engineer experience is as critical as subject (discipline) specific knowledge.  You gain experience through solving problems using Procedures Techniques Rules of Thumb Learning from failures  Experience teaches you the tricks of the trade  Engineers design and in designing they consider Cost Reliability Manufacturability Ergonomics Marketability  Most of these constraints are satisfied based on experience and working with others in teams.

Namas Chandra Introduction to Mechanical engineering Chapter 1-24 EML 3004C Engineering: Intuition  Intuition is acquired through experience, practice and some more practice.  As you will see, in design there are unclear and often conflicting requirements. They all need to be satisfied and a feel is required. That is intuition.  As more and more design tools like Computer analysis programs (finite element methods) Visualizations Virtual prototyping Integrated CAD/CAM/CAE become available, then less and less intuition may be needed.