Hi!
I am having trouble running a cylindric model meshed with gmsh. I get some errors stating "Negative jacobian detected at integration point ... of element ...
Did you use the right node numbering?" and then the run aborts with the info febio found some initially inverted elements.
As to now I understood that negative jacobians occur due to too large deformations or ill formed elements. However, when I look at the mentioned elements in gmsh they (or at least most of them) seem to be shaped fairly well, meaning they are not particularly flat and have no intersecting faces.
Exactly which jacobian is detected to be negative here, and how is it computed? I would really like to figure out how to get these elements right, since gmsh is not able to create a hexahedral mesh without these errors.
I attached a feb-file of this problem, although i'm not sure if you are able to look at the individual elements in febio respectively preview/postview. I did that in gmsh.
I should probably point out, too, that i did not use febio's importer but created the .feb file manually from the gmsh-file.
Thanks,
Sebastian
I am having trouble running a cylindric model meshed with gmsh. I get some errors stating "Negative jacobian detected at integration point ... of element ...
Did you use the right node numbering?" and then the run aborts with the info febio found some initially inverted elements.
As to now I understood that negative jacobians occur due to too large deformations or ill formed elements. However, when I look at the mentioned elements in gmsh they (or at least most of them) seem to be shaped fairly well, meaning they are not particularly flat and have no intersecting faces.
Exactly which jacobian is detected to be negative here, and how is it computed? I would really like to figure out how to get these elements right, since gmsh is not able to create a hexahedral mesh without these errors.
I attached a feb-file of this problem, although i'm not sure if you are able to look at the individual elements in febio respectively preview/postview. I did that in gmsh.
I should probably point out, too, that i did not use febio's importer but created the .feb file manually from the gmsh-file.
Thanks,
Sebastian
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