Preparation

• Do the example given in the notes from last class. We skipped this, but you will be expected to know it.
• Read sections 3-6 and 3-7 in the book.
• Read the Wikipedia article on Mohr's Circle.
• Make copies of two of your five designs to use during your lightning talks.
• Have your notebook ready for grading in class, i.e. clearly label the 5 designs and make it as easy as possible for us to find them. For example, you can use post-it notes to label them.
• Plan and practice your two lightning talks.

Concepts

After this lesson you should be able to:

• Compute the 3D principal stresses and directions.
• Utilize Mohr's circle (2D/3D) to find stresses at any orientation.

Upcoming Due Dates

• Five in-notebook detailed designs will be due in class.
• Homework #2 will be due Monday, October 12th.
• A rough draft of your Project 1 report will be due Friday, October 16th before class.
• A result from the Solidworks tutorial will be due Friday, October 16th at the beginning of class.