Stress and Strain

https://uwaterloo.atlassian.net/wiki/spaces/EIC/pages/31727389941/Stress+and+Strain

This really great video explains it as well: https://www.youtube.com/watch?v=aQf6Q8t1FQE&ab_channel=TheEfficientEngineer

Stress is a quantity that describes the distribution of internal forces within a body. $\sigma =\frac{F}{A}$

The deformation of an object in response to stress is characterized by a quantity called strain.

$ϵ=\frac{\Delta L}{L}$

Relationship between stress and strain

$\sigma =Yϵ$ where $Y$ is Young’s Modulus