Description of the 3-2-1 method

- [Instructor] This chapter is all about using…the 3-2-1 method because we want to improve the…simulation of stress distribution around the big end.…It's a method I first came across about 15 years ago…and it really changed the way I think…about modeling a lot of components.…So in this video we're going to look…at the background to that method.…We analyzed the conrod previously by…constraining the big end down to the ground.…So how can we avoid doing that?…Constraining in this way, grounding out the big end,…is effectively like superglue-ing the conrod to the crank.…

So so far we've had to ignore the big-end results…in terms of both stresses,…and also in terms of displacements.…It really just not a very good way to set up an FEA model.…So our objectives with the new analysis are:…to only apply load at the interfaces,…which in this case means both…the big end and the little end.…We want to avoid constraining any of the interfaces.…In this case specifically,…we're trying to avoid constraining the big end now.…We've got to apply a balanced set of loads…