jyvikoandClaude Opus 5.5
9c1c8f75c2
SolidCraft lists a solid's faces in a different order from run to run (the rounded box, for one), which reordered the triangle soup and the face tags with every coordinate the same; welding keeps the first copy it meets and every later stage visits ids in order, so the tet mesh changed between runs. CanonicalSoup sorts the triangles by their coordinates, numbers vertices by first use and face tags by first appearance, and maps the tags back; mesh.tet.generate and the corpus use it. Tests: the washer's tet10 mesh has a fixed fingerprint (identical on arm64 and x86-64 builds); a reordered, renumbered input gives the same mesh; heavy: rounded-box and filleted-bracket mesh bit for bit the same on repeated runs and with 1 and 8 threads. The bracket oracle cases stay unfrozen: SolidCraft's tessellation itself differs in the last bits between arm64 and x86-64. The coarse case moves to 203.6 MPa with the canonical order; its band is 5%. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01UhhZMBTviDQxZvwnyP89fo
Filleted L-bracket: peak stress on the fillet (fine mesh)
The corpus part filleted-bracket (an 8 mm L-bracket with an R6 inside fillet and a hole through
each leg), built with SolidCraft from design.json. The foot face F2:side:l1 is clamped and a
2 kN load in +x acts on the top face F2:side:l5 (steel, E = 210 GPa, ν = 0.3). The leg bends
about its root, where the fillet concentrates the stress; beam theory gives about 197 MPa nominal
at the root (6FL/(bt²) with L = 42 mm, b = 40 mm, t = 8 mm).
mesh.tet.generate makes a quality tet10 mesh (size 5.66 mm, 31.8° per element along curved
faces), with the boundary and mid-edge nodes on the exact fillet cylinder. The peak nodal von
Mises stress on the fillet over a four-level study (sizes 16, 11.3, 8, 5.66 mm with 90°, 64°,
45°, 32°): 213.3, 210.6, 214.3, 213.3 MPa. The coarse and the fine level are the two cases.