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 Stress Transformation and Mohr's Circle, 01082019

This video looks at stress transformation and Mohr’s circle. Stress transformation is a way of determining the normal and shear stress components acting at a specific location within a body, as we rotate the coordinate system we are using to observe the stresses. Mohr's circle is a simple but powerful technique used to represent stress transformation graphically. It is used to determine principal stresses, the angle of rotation to the principal planes, and the maximum shear stress.

The Efficient Engineer - An Introduction to Stress and Strain 11022020

This video is an introduction to stress and strain, which are fundamental concepts that are used to describe how an object responds to externally applied loads.