Through_crack_modeling_approaches
in Structures
Hello, dear members of the forum! Can you please tell me, except how through creating a cut in the geometry it is impossible to model a through crack? I mean 2 approaches: creating a rectangular cut-through in geometry with subsequent implantation of a semi-elliptical crack at the ends, or creating a cut-through with sharp ends at the vertices and then applying a premeshed crack. And will these approaches be correct?
Comments
Hello,
With our current tools, the crack front (the nodes along the edge which comprise the initial crack tip) needs to be contiguous. If modeling a through-crack, adhering to this requirement doesn't seem feasible. However, if you're performing crack growth (via SMART, XFEM, or manually growing the crack yourself) you could use either a semi-elliptical or premeshed crack as an initial surface crack and then as the crack grows it could eventually become a through-crack. Or, if you want to model the initial crack in such a way that it is very close to the final boundary or outer wall and then calculate what is the critical K or J value that will cause the crack to penetrate that wall, then a premeshed crack could work in this case, since you're starting with a contiguous crack front. Please let me know if I'm understanding the problem correctly and I should be able to provide further guidance. Thank you.