{"id":318145,"date":"2023-11-17T09:44:16","date_gmt":"2023-11-17T09:44:16","guid":{"rendered":"\/forum\/forums\/topic\/meshing-around-a-semi-elliptical-crack-warning-during-crack-meshing-error\/"},"modified":"2023-11-17T14:01:19","modified_gmt":"2023-11-17T14:01:19","slug":"meshing-around-a-semi-elliptical-crack-warning-during-crack-meshing-error","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/meshing-around-a-semi-elliptical-crack-warning-during-crack-meshing-error\/","title":{"rendered":"Meshing around a semi elliptical crack; warning: during crack meshing error"},"content":{"rendered":"

Hello,<\/p>\n

my problem is the following:
my model contains a plate and on top of this plate is a smaller plate (cover plate) welded. Also there is a crack in the beginning of the weld, as you can see:<\/p>\n

\"\"<\/a><\/p>\n

The following boundary conditions are set;<\/p>\n

– the welds (triangle volume bodys) and the bottom plate are one Part with a shared topology<\/strong>, since through the welding process they are one piece and that´s how the mesh gets continoous.
– the cover plate (upper plate) is bonded<\/strong> to the welds with an MPC<\/strong>, <\/strong>since they are also connected through the welding. The contact between the cover plate and the bottom plate is defined through friction (coefficient:0,2) because they are not bonded or something.
– the back is fixed and on the left side is a tension with 100 MPa (or a pressure with -100 MPa)
– on the weld toe is a semi elliptical crack which I inserted with the fracture Tool over semi elliptical crack, see also below:<\/p>\n

<\/p>\n

 <\/p>\n

For\"\"<\/a><\/p>\n

My problem is: I do a parameter study and sometimes the crack meshs with the surrounding mesh and sometimes not. I assume it is because it is difficult because it is so close to the weld toe.<\/p>\n

1. Is there a way to get a stable meshing for all crack sizes?
2. My simulation takes very long with an element size of 2, is there a way to get it faster?
3. how close can I go to the weld toe? right now my closest is 0,3 mm (with a hexaeder mesh and a largest profile radius of 0,2mm )<\/p>\n

Thank you so much for your time and help.<\/p>\n

Best regards,<\/p>\n

Elena<\/p>\n","protected":false},"template":"","class_list":["post-318145","topic","type-topic","status-closed","hentry","topic-tag-crack","topic-tag-crack-analysis-1","topic-tag-fracture","topic-tag-fracture-mechanics","topic-tag-mesh-fracture-crack-1","topic-tag-semi-elliptical-crack"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t