Weird elements below a distance of 1e-7 (triangles not sharing nodes)
Hello everyone! I am writing for help.
I am working with fracture mechanics. Specifically my geometry is a rectangle with a predefined crack (points 1-2) and a node (point 2) representing the tip of the crack.
I need a very refined mesh around the tip of the crack, that means I need information at a distance between 1e-7 and 1e-9 from the tip.
The problem is that I am getting weird elements in this range below 1e-7, any method to generate the mesh gives me something like this:
And because of this my simulations are giving me strange results. In the following figure you can see a blue zone with stresses of zero value on the right part of the crack tip, which is incorrect. In fact, the tip in the simulation shifted to the right as can be seen in the stress concentration (red).
I appreciate any help you can give me. I tried different ways to generate the mesh, but I am only attaching the version using the distance + threshold fields.
Thanks!