The Efficient Engineer - Understanding Failure Theories, 02062020

Failure theories are used to predict when a material will fail due to static loading. They do this by comparing the stress state at a point with material properties that can be easily determined from testing, like the yield or ultimate strengths of the material determined from a uniaxial test. This video covers some of the main theories for ductile and for brittle materials - Rankine, Tresca, von Mises, as well as the Coulomb-Mohr and Modified Mohr theories

The Efficient Engineer - Understanding the Deflection of Beams

In this video we take a look at five methods that can be used to predict how a beam will deform when loads are applied to it. These are the double integration method, Macaulay's method, the principle of superposition, the moment-area method, and Castigliano's theorem, which is based on strain energy.