Learning Activity #11 (graded! part of in-class learning activities!)

Learning Activity #11 is based on buckling and stress concentration exam problems from previous semesters. The problem statements are included within the questions.

You may do this learning activity during class Wednesday, May 3, or you may complete it at any time Monday, May 1 through Wednesday, May 3. If you haven't finished within 50 minutes, it will submit itself automatically. You will be able to see your responses and the correct answers. You may attempt the learning activity a second time, if you choose, and the score of your second attempt will replace the score of your first attempt.

The primary learning outcome of an Euler buckling problem is to determine whether or not buckling is predicted to occur (or the factor of safety with respect to buckling) and the mode of buckling, i.e., whether the buckling occurs in the x-y plane or the y-z plane or the x-z plane, depending on the coordinate system, the supports at the ends, and the section properties. Once you have analyzed buckling, you should be prepared to also demonstrate your mastery of other learning outcomes such as whether the maximum allowable compressive stress is exceeded before buckling occurs, or how to mitigate buckling by orienting the cross-section's weak and strong axes of the column, by changing the cross-section dimensions, or by adding supports at strategic locations along the column.

The primary learning outcome of a stress concentrations problem is to determine the stresses at a fillet, groove, notch, hole, etc. of an axially loaded, torsion-loaded, or transverse-loaded structure or machine component. Once you have determined the stresses at the location where stress concentrations occur, you should be prepared to also demonstrate your mastery of other learning outcomes such as applying an appropriate failure theory, determining a factor of safety, or making recommendations for design improvements (such as altering the cross-section dimensions or the number or location of geometric discontinuities).