forked from 1b-agent/fieldcraft-upstream
jyvikoandClaude Opus 5.5
6d9452ad84
The oracle binary (modelcraft-testkit) runs each case's recipe through the command engine, measures its quantities by JSON pointers into step outputs or commands, compares them with the cited references and the frozen fixtures, and writes docs/oracle.md. 20 theory cases (patch tests of every solid element, Timoshenko cantilevers, Lame, Kirsch, beam frequencies, torsion and bending through couplings, explicit waves and impact, CDT invariants), 8 published benchmarks (MacNeal-Harder patch, straight and curved cantilevers, thick cylinder, Scordelis-Lo with solids, NAFEMS LE1, LE10, FV32) and 10 pending cases with citations. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01NmAttHhUZTokgPeEJia8sm
595 B
595 B
NAFEMS LE1 elliptic membrane (hex20 plane stress layer)
Our model of the published problem: the quarter membrane between the ellipses (x/2)² + y² = 1 and (x/3.25)² + (y/2.75)² = 1, thickness 0.1, E = 210 GPa, ν = 0.3 (MPa and m), u_x = 0 on AB (x = 0), u_y = 0 on CD (y = 0), an outward pressure of 10 MPa on the outer edge BC. Plane stress is modelled by half the thickness of hex20 elements with a symmetry plane at the mid-surface and the other face free: 24 × 48 elements graded 4 : 1 towards the hole, converged at D (32 × 64 with the same grading changes σ_yy there by 0.003%).