RE: MESHING FAILED

Stefanos Papavasileiou — Thu, 21 Oct 2021 15:49:36 GMT

Dear António,

From the screenshot, it is not clear to me what is happening in the highlighted bounding box (5.641; 3.084; -4.462), (5.771; 3.222; -4.156). That is the starting point.

You can check if the geometry is properly snapped because similar issues can occur when there is a small inaccuracy introduced (gap or overlap).

There are other cases in which you might have geometry objects close to each other that the automatic mesh generator cannot fit (good-quality) elements around.

You can find such issues in the geometry by using this command in Structures mode:

checkgeometry

This command checks if objects overlap or are adjacent and gives a list of items with their distance. So please check here the geometry that is marked as being close by.

In some cases, this command does not give any feedback. This command by default takes a distance tolerance related to the model's size. If the command does not give this info, then add a parameter to this command, e.g. 0.01 to check all geometry that is located within 0.01 m:

checkgeometry 0.01

You can also check the size of the of the intersected objects in Mesh mode to locate problems. To do so, make use of the tabulate command, see the examples below. You might want to adjust the numbers below to fit your model's size.

#To find small Surfaces:

tabulate Surfaces "Area" "Area<0.5"

#To find small Polycurves (e.g. used for Tunnels):

tabulate Polycurves "Length" "Length<0.1"

#To find small Volumes:

tabulate Volumes "Volume" "Volume<1"

#To find small SoilVolumes:

tabulate SoilVolumes "Volume" "Volume<1"

The list of Volumes might be different from SoilVolumes if you model volumes outside the borehole soil layers.

More details on the tabulate command, see here:
https://communities.bentley.com/products/geotechnical1/w/wiki/45942/obtaining-tabulated-data-from-plaxis-input

Apart from that, the snap and mergeequivalents commands can also help in making the geometry accurate in order to proceed in the meshing procedure. For more information about these commands please check our Reference manual and Command reference (Help menu).

Please try to locate all potential problematic geometry in your model in Input and fix them. Note that not all reported objects are necessarily problems that need to be fixed.

If you still have tried the above and still have issues with meshing, please submit a service request.

Then, one of our support engineers can help you in detail: https://apps.bentley.com/srmanager/ProductSupport