J-integral
J-integral
(OP)
Dear all,
I`m trying to calculate the j-integral with 3D-Elements and I keep getting the error message "The following contour integral objects contains regions that cannot be mapped into layers of node sets". I`ve made circular mesh around the crack tip with quadratic wedge elements in the crack front and quadratic hexahedral elements in the remainder of the j-integral region. Has anyone experienced the same problem and solved it?
I`m trying to calculate the j-integral with 3D-Elements and I keep getting the error message "The following contour integral objects contains regions that cannot be mapped into layers of node sets". I`ve made circular mesh around the crack tip with quadratic wedge elements in the crack front and quadratic hexahedral elements in the remainder of the j-integral region. Has anyone experienced the same problem and solved it?





RE: J-integral
In the Example Problems Manuals are examples how it should look like.
RE: J-integral
I have circular partitions around the crack tip so the mesh is circular. just like in the example problems manual. With wedge elements adjacent to the crack tip and brick elements around the wedge elements. I can't see any difference to the mesh in the example problems manual. The crack tip and the q vectors are correct too and there is a seam crack inside.
I also tried to write the model to an input file to import the orphan mesh and define the crack on the mesh. When I defined a circular line of element edges to form the crack tip I had the error message that "the line must be a closed loop". So I guess there must be a gap between the elements somewhere. Maybe its because of a bad quality of the geometry?
RE: J-integral
RE: J-integral
RE: J-integral
RE: J-integral
That means if an orphan mesh is being imported in order to define a crack the imported crack front must not contain collapsed nodes. The collapsed nodes which account for the singularity must be generated at the orphan mesh.