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 <[email protected]> Claude-Session: https://claude.ai/code/session_01NmAttHhUZTokgPeEJia8sm
56 lines
1.6 KiB
JSON
56 lines
1.6 KiB
JSON
{
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"title": "MacNeal–Harder curved cantilever, hex8 with incompatible modes",
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"kind": "benchmark",
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"source": "MacNeal and Harder, 'A proposed standard set of problems to test finite element accuracy', Finite Elements in Analysis and Design 1 (1985) 3–20: Fig. 5 (p. 7) geometry, material and mesh; Table 3 (p. 10) theoretical tip displacements",
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"quantities": [
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{
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"id": "in_plane",
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"quantity": "tip displacement along the in-plane load",
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"measure": {
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"command": "solve.probe",
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"params": {
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"step": "In_plane",
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"at": [
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[
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0,
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4.12,
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0
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]
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]
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},
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"pointer": "/nodes/0/displacement/1"
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},
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"value": 0.08734,
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"tolerance": {
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"relative": 0.02
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},
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"reason": "MacNeal and Harder grade an element A within 2% of the theoretical value on this prescribed coarse mesh (p. 14)",
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"known_failure": "0.880 of the theory, grade C: straight-sided hex8 on six elements over 90° (MacNeal–Harder's HEXA(8): 0.880, Table 9 p. 15)"
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},
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{
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"id": "out_of_plane",
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"quantity": "tip displacement along the out-of-plane load",
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"measure": {
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"command": "solve.probe",
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"params": {
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"step": "Out_of_plane",
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"at": [
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[
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0,
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4.12,
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0
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]
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]
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},
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"pointer": "/nodes/0/displacement/2"
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},
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"value": 0.5022,
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"tolerance": {
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"relative": 0.02
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},
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"reason": "MacNeal and Harder grade an element A within 2% of the theoretical value on this prescribed coarse mesh (p. 14)",
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"known_failure": "0.798 of the theory, grade D: out-of-plane bending with torsion on one element across (MacNeal–Harder's HEXA(8): 0.849)"
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}
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]
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}
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