It's no surprise that all solids deform when they're subjected to loads. But not all of deformations result in changing their volume - some do it more willingly, while others resist it to their last atom!
Take cork, for example. It willingly changes its volume during deformation so it's used for bottling wine and champagne.
But rubber compounds are not so willing, and they are more inclined toward incompressible behavior. Due to this, they're used in applications where it's important to retain the volume.
In both cases, it's important to know what portion of the total strain is volume-changing and what portion is volume-preserving. In this lesson, we'll introduce how this split occurs mathematically.
Here are the accompanying handout slides for this lesson.