Plan for Monday, November 16, 2015
9:00
Review
- Show the diagram with all the static theories
Goals
- Intro to fatigue failure
9:10
Introduction to fatigue
9:15
S-N curves
9:25
- Moore machine videos
9:30
Catostrophic failure images and videos
9:35
Failure mechanisms
9:45
HW #6: will accept answers for radius or diameter of 0.75"
HW #7 will be posted today.
Memo 2 will be graded today.
Memo 3: static failure will be due Friday
- Identify the elements with the highest stresses due to static loadings.
- Requirement: 250 lb standing on end of rack, but you need to locate other failure points in your design.
- Show individual factor of safety for critical points (hand calcs required, FEA can be used to support your conclusions)
- Report the overall factor of safety for the design.
- Jusitfy your material and geometry choices.
- Explanations on what you may need to redesign to make it safer: material choice, geometry changes, etc.
Results from FEA due to smartsite by Friday