Most introductory FEA content stops at "we divide the part into little elements and solve." That hand-wave hides the part that actually determines whether your simulation is trustworthy: mesh convergence. This video tackles that head-on.

The description hints at exactly the right framing — engineers don't just run a single mesh and trust the colorful stress plot. They refine the mesh and watch whether displacement, stress, or energy stabilize as element size shrinks. If the answer keeps moving, the mesh is too coarse. If it asymptotes, you've found a result that's a property of the physics, not an artifact of your discretization.

This is the kind of practical literacy that separates someone who can drive a CAD package's "Simulate" button from someone who can defend a number to a reviewer. It's also the concept that catches out new analysts most often: stress singularities at sharp corners that never converge, displacement that converges quickly while peak stress doesn't, and the difference between h-refinement and p-refinement.

As "part 2," it presumes you've seen the geometric setup of FEA already and gets into the analytical core. The other candidates in today's list lean toward intro overviews or single-element derivations; this one targets the judgment skill that actually matters in practice.