Hello,
I am very new to Trelis. I am currently using a trial of the software to verify that it will fit into my modeling work flow.
Currently, I am experimenting with meshing a brick geometry with an inner sphere. Ultimately, I would like to apply forces to the inner sphere, observing how this affects the brick.
I have tried to create this mesh using two different methods. The first method (method1.jou) involves the simple generation of a sphere geometry inside the brick, then meshing. This seems to mesh without a problem. Nevertheless, when I attempt to model some sort of displacement on the inner sphere (using a software called Pylith), there seems to be no coupling between the inner sphere and the outer brick.
The second method (method2.jou) I have tried is a variant of the cube with a hollow sphere tutorial. In it, I am using a brick that is extended in the z direction. When I mesh this, I encounter cells with a negative jacobian. I try to amend this by using the untangle tool. This proves to be unsuccessful.
I have attached the files (as well as included the commands below). I am surely oversimplifying this problem or making false assumption. I appreciate any help.
-P
method1.jou
brick x 6000 y 6000 z 4000
sphere r 1000
volume all move x 0 y 0 z -2000
volume 1 name “wall_rock”
volume 2 name “chamber”
surface 7 name “chamber_surface”
imprint all with volume all
merge all
volume all size 1000
mesh volume all
block 1 volume 1
block 1 name “elastic”
block 2 volume 2
block 2 name “viscoelastic”
group “chamber_nodes” add node in chamber_surface
nodeset 11 group chamber_nodes
nodeset 11 name “chamber_nodes”
group “face_zneg” add node in surface 2
nodeset 12 group face_zneg
nodeset 12 name “z_neg”
group “face_zpos” add node in surface 1
nodeset 13 group face_zpos
nodeset 13 name “z_pos”
method2.jou
brick x 6000 y 6000 z 4000
sphere r 1000
volume all move x 0 y 0 z -2000
volume all size 1000
subtract volume 2 from volume 1
webcut body 1 with plane xplane offset 0
webcut body 1 with plane yplane offset 0
delete body 4 3
volume 3 scheme polyhedron
mesh volume 3
undo group begin
volume 3 smooth scheme untangle beta 0.02 cpu 10
smooth volume 3
undo group end
quality volume 3 jacobian global draw mesh
method2.jou (418 Bytes)
method1.jou (683 Bytes)