Failure and Fully Plastic Action

This week we'll look at the definition of failure, failure theories, and real-life examples of failed components.  You will yield a piece of steel in flexure and refer back to your previous tests in order to compare the tensile, torsion, bending and direct-shear yield points of this material.  We'll compare these experimental results to the maximum shear stress, maximum octahedral shear stress, maximum principal strain, and maximum principal stress theories.....and estimate which theory works best for this material.  Finally, we will investigate failed components, estimate what caused the failure, and propose a remedy.


Video Lecture (26 minutes)



photos by Jeff Thomas, 2002