2.72 | Spring 2009 | Undergraduate

Elements of Mechanical Design

Readings

[S&M] = Shigley, Joseph, Charles Mischke, and Richard Budynas. Mechanical Engineering Design. Boston, MA: McGraw-Hill, 2003. ISBN: 9780072921939.

SES # TOPICS READINGS
1 Principles: overview, assessment, group formation

[S&M] 3.1, 3.2, 3.4, 3.7, 3.8, 3.10, 3.11

Refresh your knowledge of beam bending, 1st and 2nd order system vibrations

2 Fundamentals: mechanics, dynamics, heat transfer, matrices, and errors

[S&M] 4.1-4.5, 5.1-5.5

Pay special attention to examples 4.1, 4.4, 5.3, 5.4

3 Shafts & ways: deformation, stresses, and integration

[S&M] 6.1-6.4, 6.7-6.12

Pay special attention to example 6.12

4 Fatigue: fundamentals and modeling methods None
5 Structures: architectures, homogenous transfer matrices, and system models None
6 Constraints I: constraint-based design, alignment, preloading, and stability

[S&M], chapter 11

Read 11.1-11.6, 11.9

Skim 11.7-11.8, 11.10-11.12

7 Constraints II: rolling and sliding element bearings Bearing basics (PDF)
8 Constraints III: flexure bearing elastomechanics & dynamics

Hale, Layton C. “Principles and Techniques for Designing Precision Machines.” Ph.D. Thesis, Massachusetts Institute of Technology, 1999.

Read 2.6, 2.7, 6.1

Skim the rest of chapter 6

9 Connections I: alignment interfaces

[S&M], chapter 8

Read 8.1, 8.3-8.5, 8.7, 8.9-8.11

Skim 8.6, 8.8, 8.12

10 Connections II: bolted joints [S&M] 8.2
11 Drives I: screw drives

[S&M], chapters 13 and 17

Read 13.1-13.7, 17.1, 17.3

Skim the rest of chapter 17

12

Drives II: belt and friction drives

Gears I: kinematics

[S&M], chapter 14

Read 14.1-14.7

Skim the rest of chapter 14

13 Gears II: mechanics and selection None
14 Actuators: DC motors, piezos, magnet-coil, and hydraulics Chen, Skim, Shih-Chi, and Martin L. Culpepper. “Design of a six-axis micro-scale nanopositioner - µHexFlex.” Precision Engineering 30 (2006): 314-324.
15 Actuators: thermal and electrostatic microactuators None
16 Vibrations: machine dynamics and damping Skim gear selection reading
17 Linkages: degrees of freedom and kinematics None
18 Friction elements: clutches and brakes [S&M] 14.1-14.7, 16.2, 16.6, 16.9
19-25 Project work None
26 Last day of class overview, demonstrations and assessment None

Course Info

As Taught In
Spring 2009
Learning Resource Types
Problem Sets
Lecture Notes
Projects