#Meshlab reduce mesh density how to#

Notice where high deformations or high stresses occur, perhaps it is worth to refine mesh in those regions.

Perform chosen analysis for several different mesh sizes.

In order to establish suitable finite element size: In this example, I am using QUAD4 elements (normal 4 node quadrilateral elements, sometimes referred to as “S4”). This is somewhat true but let’s face it, you won’t make it for each problem most likely… it simply takes a lot of time! I would suggest you do such a study for some of the most important projects/parts and based on that experience you can extrapolate the knowledge to similar problems.

I should write that a mesh refinement check (often called mesh convergence) should be made for each problem. Notice how deformation shape and outcomes change with the mesh refinement. Whatever you choose goes, as long as it is actually influenced by the mesh size! I took the multiplier simply as it is easy to obtain, and linear buckling computes very fast 🙂 Choose a correct mesh size If you want to know the certain stress component in a certain node, or a displacement of selected DOF that is ok. It’s perhaps worth mentioning that the “outcome” can be anything that interests you. As an “outcome” I will use the critical load multiplier of the first eigenvalue.

#Meshlab reduce mesh density how to#

Learn how to choose the correct size of mesh and estimate at which mesh size accuracy of the solution is acceptable.Īs an example, I will use a simple discretely supported shell. You never really know where exactly is your mesh size on this scale.

There is a fine line here: bigger elements give bad results, but smaller elements make computing so long you don’t get the results at all. Mesh size is one of the most common problems in FEA.