Follow-up from "Sneddon"
The following discussion from !4399 (merged) should be addressed:
This figure shows negative displacements just outside of the crack and the convergence with h->0 is not really obvious (essentially with smaller h the negative displacement becomes bigger). Negative displacements, if I understand the situation correctly, mean penetration just outside of the crack. Can you comment on this issue?
Furthermore the some measure illustrating convergence for h->0 should be introduced and the grid convergence order shown.  A comment on the inaccuracy of width at crack tips is added. Regarding the second item, we did it for Decovalex paper. I'll add it here once the manuscript is published.