Problem - Exporting Nodeset

Coreform Cubit Importing/Exporting
#1

Hello,

I am creating a meshed geometry which i am exporting to abaqus using Export “Abaqus ‘cubitMesh.inp’ overwrite”. Using the nodeset command i have created a number of nodesets which I would also like to have in the input file. At several points during geometry creation I am using the “merge all” command. Everything worked fine and the nodesets are in the Abaqus Input file

Going to smaller geometries I had some problems with the merge command merging nodes which are close together but should not be merged so that I specified a tolerance for merging using “merge all tolerance 0.0001” while 0.0001 is chosen by thumb.
Unfortunately when I am exporting the Abaqus input file now it does not contain the nodesets anymore.

Has anyone an idea why this might happen or how I can solve this problem?

Best wishes
Martin

#2

Attached you find a small example for which the problem appears if you replace “merge all” by “merge all toleranz 0.0001”. In case using “merge all toleranz 0.0001” the nodesets are not written to the Abaqus Input file anymore.

[code]reset

create vertex 0 0
create vertex 1 0
create vertex 1 1
create vertex 0 1

create curve vertex 1 2
create curve vertex 2 3
create curve vertex 3 4
create curve vertex 4 1
merge all

create surface vertex 1 2 3 4
merge all

nodeset 1 curve 1 3
nodeset 1 name ‘Curve_1_3’
nodeset 2 curve 2 4
nodeset 2 name ‘Curve_2_4’

surface 1 size 1
surface 1 scheme pave
mesh surface 1
Export Abaqus ‘cubitMesh.inp’ overwrite[/code]

Best wishes
Martin

#3

Seems that this:

[code]reset

merge tolerance 1e-6
create vertex 0 0
create vertex 1 0
create vertex 1 1
create vertex 0 1

create curve vertex 1 2
create curve vertex 2 3
create curve vertex 3 4
create curve vertex 4 1
merge all

create surface vertex 1 2 3 4
merge all

nodeset 1 curve 1 3
nodeset 1 name ‘Curve_1_3’
nodeset 2 curve 2 4
nodeset 2 name ‘Curve_2_4’

surface 1 size 1
surface 1 scheme pave
mesh surface 1
Export Abaqus ‘cubitMesh.inp’ overwrite[/code]

works. Tolerance is specified earlier and Nodesets are still in Input File.

Best wishes
Martin