# Coursebooks 2016-2017

## Mechanical design principles

Paik Jamie

English

#### Summary

We will study the working principles and physics of essential mechanical components for diverse applications in engineering mechanics. The course will serve as a vehicle to introduce and synthesize new mechanisms to strengthen the often-intuitive design processes.

#### Content

1. Introduction.  Course outline. Standards, Engineering codes, Probability, Reliability, Design factor, Eco-pod project description

2. Structural analysis, Simple truss, Project requirements + Biblio/ citation rules

3. Exercises / Project definitions and task management

4. Simple joints: Zero force members method of sections space trusess, linkages

5. Friction elements I: Internal forces In rigid bar, cables, angle of friction, wedges

6. Fixed joints: Bolts and threads (« self-locking » or not?), Joint fixations (bolted and welded)

7. Power transmission: Flat power belts /cable tension

8. Brakes: Gears, Bearings, Collar bearing, Disk brakes

9. Compliant mechanisms, Springs

10. Moving joints I: Virtual work, kinetics of bars

11. Moving joints II: Planar kinematics of a rigid body

12. Relative motions, last report check w/ RG

13. Course overview I, presentation 15 min (group 1-8)

14. Course overview II, presentation 15 min  (group 9-16)

#### Learning Outcomes

By the end of the course, the student must be able to:
• Use experimental and numerical tools to report the design project
• Design functional structures based on multiple DoF links and joints
• Optimize dimension, material, and fixation choices
• Analyze the structural integrity and their working range
• Model a mechanism with fixed and varied geometric parameters
• List the functions of an existing or new product based on the specifications. (CP4)
• Choose the main conceptual design solutions and identify the respective components to fulfill the perfomance, technology and price constraints. (CP5)
• Identify the class, the constitutive elements and the performances of a machine or a mechanical system (CP15)
• Formulate the modeling hypothesis and choose the solution strategy (CP6)
• Analyze multi-criterion parameters and optimize solutions.
• Design a system based on specifications utilizing suitable tools. (CP14)
• Choose the models and analysis criterions following the specifications (CP7)

#### Assessment methods

1. Midterm exam ( 40% of grade)

2. First report  (0 %)

3. Semi-­final report (0 %)

4. Final report (30% of grade)

5. Presentations (30 % of grade)

### In the programs

• Semester
Fall
• Exam form
During the semester
• Credits
4
• Subject examined
Mechanical design principles
• Lecture
2 Hour(s) per week x 14 weeks
• Exercises
1 Hour(s) per week x 14 weeks
• Practical work
1 Hour(s) per week x 14 weeks

### Reference week

MoTuWeThFr
8-9
9-10
10-11
11-12
12-13
13-14
14-15
15-16
16-17
17-18
18-19
19-20
20-21
21-22
Under construction

Lecture
Exercise, TP
Project, other

### legend

• Autumn semester
• Winter sessions
• Spring semester
• Summer sessions
• Lecture in French
• Lecture in English
• Lecture in German