forked from 1b-agent/fieldcraft-upstream
The pending 2D LE1 case becomes a real one; the plasticity cases stay pending with what they still need (static J2 for the collapse pressure, the transcribed measurements for the Taylor bar). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01NmAttHhUZTokgPeEJia8sm
Plate with a circular hole in tension, 2D plane stress (Kirsch)
The plate of kirsch-plate as a 2D plane stress model: a quarter of half-width 30 with a hole of
radius 1, two quad8 patches around the hole (40 × 16 each, graded 40 : 1 towards it, mid-side
nodes on the arc), symmetry on x = 0 and y = 0, a traction of 1 on x = 30.