A36 Steel Tensile Test

At about eight seconds in, I can start to see the necking which causes the force to concentrate on that area which causes further necking which causes force concentration...back and forth until catastrophic failure nearly at the end of the video.

Not much else to say here but that it's a nice video of a tensile test being performed. I just wish we could get a concurrent graph of the stress/strain curve being generated.

Here's another tensile test from a bit further away...