Monday, August 22

• Review the Course Syllabus and the Course Schedule
• Read Chapter 1 of the Shigley text
• Read Wayne Hale's blog post on Factors of Safety
• Watch the news story Engineers attempt to create better batteries, paying attention to the portion discussing flywheels
• Watch this video of a tractor pull competition
• Complete the Lecture 1 (August 22) quiz on Gradescope

Wednesday, August 24

• Read sections 3-4 to 3-12 of the Shigley text
• For an example of various failure modes for a single machine component, consider the example of an IVC filter.
  • Watch this video showing IVC filter deployment under angiography, or these animations of IVC filter deployment and retrieval.
  • Review the FDA's guidance for IVC filter evaluation.
• The Combined Stress Analysis Worksheet is provided as a tool to assist you in identifying critical elements
• Review video solutions to the example problems
  • Example 1
  • Example 2
  • Example 3
  • Example 4
  • Example 5
• Complete the Lecture 2 (August 24) quiz on Gradescope
• Complete homework problems 3-85 and 3-92 from the Shigley text

Friday, August 26

• Read sections 5-4 to 5-7 of the Shigley text
• Watch an example of a tensile test of a ductile material.  Notice how the specimen yields before failing.
• Watch examples of mechanical tests on concrete samples, both with and without rebar.
• Review video solutions to the example problems
  • Example 6
  • Example 7
  • Example 8
  • Example 9 
• Complete the Lecture 3 (August 26) quiz on Gradescope
• Complete homework problems 5-56 and 5-61 from the Shigley text

Monday, August 29

• See the schedule from Friday, August 26...we're a little behind on the syllabus but will catch up.
• The Lecture 3 (August 26) quiz will be due at 11:59 pm on Wednesday, August 31.  We will skip the Lecture 4 quiz.

Wednesday, August 31

• Again, see the schedule from August 26 because we're still a little behind.  We'll start to catch up on Friday, but will skip the Lecture 5 quiz and resume with Lecture 6 (will be due Wednesday, September 7).

Friday, September 2

• Read sections 5-8 to 5-11 of the Shigley text
• Review video solutions to the example problems
  • Example 10
  • Example 11
  • Example 12
• Complete homework problem 5-19 from the Shigley text

• Read sections 5-12 and 6-1 to 6-7 of the Shigley text
• Watch the video Damage to United Boeing 777 - February 2021
• If you have some time over the holiday weekend, watch the move No Highway in the Sky, a movie that stars Jimmy Stewart, Marlene Dietrich, and fatigue failure.

• Complete the Lecture 6 (September 2) quiz on Gradescope

Monday, September 5

• No class - Labor Day

Wednesday, September 7

• Read sections 6-7, 6-8, and 6-19 of the Shigley text
• Watch these videos showing fatigue tests.  Note the location of the fatigue crack and how it propagates though the material.
  • Fatigue test (3-point bending of an aluminum sample)
  • Fatigue crack growth test (uniaxial tension/compression)
  • Rotating bending fatigue test
  • An introduction to fatigue testing
• Complete the Lecture 7 (September 7) quiz on Gradescope
• Complete homework problems 6-3 and 6-5 from the Shigley text

Friday, September 9

• Read sections 6-9 and 6-19 of the Shigley text
• Review video solutions to the example problems
  • Example 13
  • Example 14
  • Example 15
  • Example 16
  • Example 17
  • Example 18
• Complete homework problem 6-10 from the Shigley text

Monday, September 12

• Read sections 6-9 and 6-19 of the Shigley text
• An example of recent research on Marin factors and the influence of surface roughness on fatigue strength
• Review video solutions to the example problems
  • Example 13
  • Example 14
  • Example 15
  • Example 16
  • Example 17
  • Example 18
• Complete the Lecture 9 (September 12) quiz on Gradescope

Wednesday, September 14

• Read sections 6-10 and 6-19 of the Shigley text
• Stress concentrations can be visualized using photoelasticity
• Review video solutions to the example problems
  • Example 19
  • Example 20
  • Example 21
  • Example 22
• Complete homework problems 6-10 and 6-14 from the Shigley text

Friday, September 16

• Peter McKeighan, PhD will be our guest speaker.
  • When Design Goes Wrong: Analyzing and Preventing Failure
  • Dr. McKeighan is a Principal at Symmetry Engineering and Forensic Consulting

Monday, September 19

• Read sections 6-11 to 6-13 and 6-19 of the Shigley text
• Watch the videos of cyclic loads for page 62  (Former NCAA champion sprinter) and page 63 (Sprint champion Jarryd Wallace) in the lecture notes
• Review video solutions to the example problems
  • Example 23
  • Example 24
• Complete homework problem 6-17 from the Shigley text
• Complete the Lecture 12 (September 19) quiz on Gradescope

Wednesday, September 21

• Read sections 6-13 and 6-19 of the Shigley text
• Review video solutions to the example problems
  • Example 25
• Complete the Lecture 13 (September 21) quiz on Gradescope

Friday, September 23

• Read sections 6-16 and 6-19 of the Shigley text
• Review video solutions to the example problems
  • Example 26
  • Example 27 part a and part b
  • Example 28
• Complete the Lecture 14 (September 23) quiz on Gradescope
• Complete homework problems 6-43, 6-48, 6-54, and 6-57 from the Shigley text

Monday, September 26

• Read sections 7-1 to 7-7 of the Shigley text
  • See the available keys on McMaster-Carr
  • Watch this video showing Failure modes of a key
• Review video solutions to the example problems
  • • Example 29
    • Example 30 part a (shaft design) and part b (key design)
• Complete the Lecture 15 (September 26) quiz on Gradescope
• Complete homework problems 7-4 and 7-18 from the Shigley text

Wednesday, September 28

• Read section 7-8 of the Shigley text
  • Watch this video showing how to press fit a bearing onto a shaft
• Review video solutions to the example problems
  • Example 31
  • Example 32
• Complete the Lecture 16 (September 28) quiz on Gradescope
• Complete homework problems 7-41 and 7-45 from the Shigley text

Friday, September 30

• Read sections 10-1 to 10-6 of the Shigley text
  • Watch this video to see how springs are made.
  • And another video of a spring manufacturing plant.
  • Watch this video to see how really large springs are made.
• Review video solutions to the example problems
  • Example 51
  • Example 54 parts a, b, c, d, and e
• Complete homework problem 10-10 from the Shigley text

Monday, October 3

• Read sections 10-7 to 10-10 of the Shigley text
  • High-speed video of spring surge (or this video without the strobe light) and an article of how springs revolutionized NASCAR.
• Review video solutions to the example problems
  • Example 52
  • Example 53
  • Example 54 parts f and g
• Complete the Lecture 18 (October 3) quiz on Gradescope
• Complete homework problem 10-22  from the Shigley text

Wednesday, October 5

• This lecture will be an opportunity for Exam 1 review
• Exam 1 will be held from 8-10 pm
• See exam details on the course website

Friday, October 7

• No class - Evening exam make-up

Monday, October 10

• No class - October Break

Wednesday, October 12

• Read section 10-11 of the Shigley text
  • Watch this video showing the making a small extension spring
  • Read this article for an example of an extension spring failure: Boy, 12, impaled by trampoline spring 'lucky to be alive'
• Review video solutions to the example problems
  • Example 55
  • Example 56
  • Example 57
• Complete the Lecture 21 (October 12) quiz on Gradescope

Friday, October 14

• Read section 10-12 of the Shigley text
  • Watch this video showing the difference between garage door extension springs and torsion springs; you can see why a torsion spring might be advantageous by watching a torsion spring breaking
  • And you can also watch the making a large torsion spring
• Review video solutions to the example problems
  • Example 58
  • Example 59
• Complete the Lecture 22 (October 14) quiz on Gradescope

Monday, October 17

• Read sections 2-1 to 2-8 of the Shigley text
  • Watch this video to see how steel is made
  • Here is a video showing some examples of cold working
  • And another video showing hot working
• Complete the Lecture 23 (October 17) quiz on Gradescope
• Complete homework problems 2-2 and 2-6 from the Shigley text

Wednesday, October 19

• Read sections 2-9 to 2-22 of the Shigley text
• Complete the Lecture 24 (October 19) quiz on Gradescope
• Complete homework problems 2-12 and 2-22 from the Shigley text

Friday, October 21

• Read sections 3-19 and 6-18 of the Shigley text
  • Watch this video to see how cams experience rolling and sliding during operation
  • Watch an excavator bucket be repaired after it experienced abrasive wear
  • Another example of surface failure is the example of metal-on-metal hip implants.  Watch these videos describing the promise of metal-on-metal hip implants...and an update
• Review video solutions to the example problems
  • • Example 33
    • Example 34
• Complete the Lecture 25 (October 21) quiz on Gradescope
• Complete homework problems 3-151 and 3-154 in the Shigley text

Monday, October 24

• Read sections 11-1 to 11-5 of the Shigley text
• To see how journal bearings operate and share lubrication, watch how oil circulates through an engine and how oil circulates through a cold engine.
• Watch these videos to see how ball bearings are made and how (really big) ball bearings are made
• Complete the Lecture 26 (October 24) quiz on Gradescope
• Complete homework problems 11-8 and 11-10 in the Shigley text

Wednesday, October 26

• Read section 11-6 of the Shigley text
• Review video solutions to the example problems
  • Example 35
  • Example 36
  • Example 37
  • Example 38 (you can access the Timkin catalog here)
    • Note: F_R for the bearing on the right side of the shaft should be 72.4 kN, not the value shown in the video.   F_R for the bearing on the left side of the shaft is also incorrect in the video.
• Complete the Lecture 27 (October 26) quiz on Gradescope
• Complete homework problems 11-23 and 11-28 in the Shigley text

Friday, October 28

• Read sections 12-1 to 12-6 of the Shigley text
  • Air bearings can move very heavy objects, and are an example of hydrostatic lubrication.
  • Driving on a wet surface is a good example of hydrodynamic lubrication.  A skid pad is an opportunity to drive on a slick surface in a controlled environment.
  • What do engine oil codes mean?  And what does the W stand for in 10W-30?  (Hint: it doesn't stand for Weight.)
  • Watch this for a comparison of oil viscosity.
• Complete the Lecture 28 (October 28) quiz on Gradescope

Monday, October 31

• Read sections 12-7 to 12-12 of the Shigley text
• Review video solutions to the example problems
  • Example 39
  • Example 40
  • Example 41 (including a cameo by Harper Hess)
  • Example 42
• Complete the Lecture 29 (October 31) quiz on Gradescope
• Complete homework problems 12-2 and 12-3 in the Shigley text

Wednesday, November 2

• Read sections 13-1 to 13-12 of the Shigley text
  • Animation of spur gears meshing
  • Spur gear generator
  • Mechanical gears in insects (and an article here and another video)
• Review video solutions to the example problems
  • Example 43
  • Example 44 (parts a, b and c and part d)
• Complete the Lecture 30 (November 2) quiz on Gradescope
• Complete homework problems 13-1, 13-3, and 13-8 in the Shigley text

Friday, November 4

• Read sections 13-13 to 13-17 of the Shigley text
• Complete homework problems 13-40 and 13-43 in the Shigley text

Monday, November 7

• Read Chapter 14 of the Shigley text
• See how gear failures look due to bending
• Review video solutions to the example problem
  • Example 45 (bending)
• Complete the Lecture 32 (November 7) quiz on Gradescope
• Complete homework problem 14-25 in the Shigley text

Wednesday, November 9

• This lecture will be an opportunity for Exam 2 review
• Exam 2 will be held from 8-10 pm
• See exam details on the course website

Friday, November 11

• No class - Evening exam make-up

Monday, November 14

• Read Chapter 14 of the Shigley text
• See how gear failures look due to surface fatigue
• Review video solutions to the example problem
  • Example 45 (wear)
• Complete the Lecture 35 (November 14) quiz on Gradescope
• Complete homework problems 14-26 and 14-27 in the Shigley text

Wednesday, November 16

• Read Section 14-9 of the Shigley text
• Watch these videos showing examples of gear trains: How Manual Transmissions Work - A Simple Explanation and Wood planetary gears
• Review video solutions to the example problems
  • Example 46
  • Example 47
  • Example 48
• Complete the Lecture 36 (November 16) quiz on Gradescope

Monday, November 21

• Read Sections 8-1 and 8-3 of the Shigley text
• Watch these examples of how fasteners are made (and demonstrations of thread rolling and thread cutting)
• Complete the Lecture 38 (November 21) quiz on Gradescope

Wednesday, November 23

• No class - Thanksgiving break

Friday, November 25

• No class - Thanksgiving break

Monday, November 28

• Read Section 8-4 of the Shigley text
• Watch this example of the difference between torque vs. tension
• Complete the Lecture 39 (November 28) quiz on Gradescope

Wednesday, November 30

• Read Sections 8-5 to 8-9 and 8-11 of the Shigley text
• Watch this demonstration of thread yielding
• Review video solutions to the example problems
  • Example 60
  • Example 61 (part a and parts b, c, and d)
  • Example 62
  • Example 63
  • Example 65 (part a and parts b and c)
  • Example 66
  • Example 67 (parts a and b and parts c and d)
  • Example 68
• Complete the Lecture 40 (November 30) quiz on Gradescope
• Complete homework problems 8-17, 8-19, 8-22, 8-32, and 8-50 in the Shigley text

Friday, December 9

• This lecture will be an opportunity for Final Exam review
• See exam details on the course website

Monday, December 12

• The Final Exam will be 3:30-5:30 pm in CL50.
• See exam details on the course website.