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 - 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.

Practical Engineering - Was Roman Concrete Better, 29102018

Comparing modern concrete to that of the western Roman empire In this video, 'Practical Engineering' discuss a few modern techniques that help improve design life of concrete, including roller compacted concrete (RCC) and water reducing admixtures (superplasticizers). There are a whole host of differences between modern concrete and that of the western Roman empire that I didn’t have time to go into, including freeze/thaw damage.