'L Bracket' simulation project by BenLewis


#1

I created a new simulation project called 'L Bracket':

Example project to show the different results obtained from different mesh types


More of my public projects can be found here.


#2

This project demonstrates the importance of selecting the appropriate mesh size and type.

The screen shots below show the results of three mesh types.

The left hand side uses a course, first order mesh. This mesh has only one element across the thickness of the plates. This mesh is too course because the mesh can not adequately represent tension on one side of the plate, a neutral axis in the middle and compression on the other side. A minimum of three elements should be used through the thickness of any plate in bending. Each element in a first order mesh can only have one stress value.

The middle example uses a fine, first order mesh with at least three elements through the thickness of the plates. It can be seen that the stress state is much higher in this example than the one on the left hand side. It can also be seen that this mesh has enough elements to represent compression (blue) on one side of the vertical plate and tension (red) on the other side.

The right hand side uses a course, second order mesh. This mesh only has one element through the thickness of the plates. The second order mesh places intermediate nodes on each element edge. This allows each element to have a stress gradient (as apposed to one stress value per element). This type of mesh is able to adequately represent bending in a plate with only one element through its thickness.


#3

Awesome, @BenLewis - thanks a lot for sharing!