The document outlines a machine design course (ME 312) led by Dr. Bilal A. Siddiqui, detailing prerequisites, course objectives, evaluation methods, and a project component. Key concepts include the design of machine elements, Newtonian mechanics, and the design cycle, emphasizing the importance of identifying needs, surveying existing solutions, and prototyping. Essential textbook references include works by J.E. Shigley and R.L. Norton among others.

1. ME 312 – Machine Design
Dr. Bilal A. Siddiqui,
Asst. Prof (ME)
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2. Course Outline
 Basic criteria of design of machine parts
 Determination of permissible and actual stresses, factor of safety etc.
 Design of …..
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3. Course Outline
 Pre-requisites
 Mechanics of Materials-I (ME-212)
 Mechanics of Materials-II (ME-213)
 Textbook
 Mechanical Engineering Design by J. E. Shigley, McGraw Hill
 References
 Machine Design, An Integrated Approach by R. L. Norton, McGraw Hill.
 Design of Machine Elements by M. F. Spotts, Prentice Hall
 Fundamentals of Machine Component Design, by R. C. Juvinall & K. M. Marshek, John
Wiley
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4. Course Outline
 Evaluation Methods
 Course Objectives
 Design common machine elements and to gain experience in solving design problems.
 Prepare professional quality solutions and effectively communicate the results of analysis
and design.
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Homeworks 6.5%
Project 7.0%
Quizzes 6.5%
Major Exams 30.0%
Final Exam 50.0%

5. What is a (Mechanical) Machine
 A machine is a tool containing one or more moving parts that uses energy to
perform the action it is designed for.
 Tool: …well, open to interpretation. Anything that makes life easy
 Moving parts: simple machines?
 Energy: chemical, electrical, mechanical, thermal etc.
 Action: transport, manufacturing, destroying etc.
 Design: ME-312
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Newtonian Mechanics

6. Simple Machines
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7. Design Example (simple lever)
 Mechanical Advantage =
𝐸𝑓𝑓𝑜𝑟𝑡 𝐴𝑟𝑚
𝑅𝑒𝑠𝑖𝑠𝑡𝑎𝑛𝑐𝑒 𝐴𝑟𝑚
=
𝐿 𝑒
𝐿 𝑟
 Constraints
 Strength of material
 Strength of Fulcrum joint
 Bearing strength
 Effort force available
 Maximum and minimum arm lengths (Le>Lr)
 Cost
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Le
Lr
Design Space

8. Compound Machines
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9. Complex Machines
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10. Really Complex Machines
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11. Nature & Engineering Design
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T=0
T= 1503
AD
T= 1903
AD
T= 2003
AD

12. So what is the best Design
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13. The Design Cycle
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Identify need
Survey existing
solutions
Define Problem
(constraints,
requirements…)
Select Possible
Solutions
Evaluate Solutions
(simulations)
Select ‘Best’ Solution
Develop and
Prototype Solution
Testing and further
improvement
Presentation and
Communicate
optimization

14. Design Stages
 Initial Design
 Preliminary Design
 Detailed Design
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15. Course Project…..
 1. Define need
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DESPERATE: We need to replace these
guys with these…

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17. Course Project…..
 1. Survey Existing Solutions
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18. 2. Offshoot Ideas
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19. 3. Generate Ideas (Brainstorm)
 Come up with several concepts
 New
 …or hybrid
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20. Define the Problem
 Which disabilities?
 What sizes?
 Constraints?
 Regulations?
 Business model?
 Which parts are required?
 Who are the competitors?
 Our advantage?
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