forked from 1b-agent/fieldcraft-upstream
Theory cases for the nonlinear solver, each frozen as a fixture: uniaxial stretch of a neo-Hookean block to twice its length (closed form), the nonlinear patch test on a distorted hex8 mesh, a quarter turn of the same mesh (objectivity: zero stress), the elastica of a hex20 cantilever at P L²/(E I) = 1, 2, 5, 10 against Bisshopp–Drucker (0.2–0.5 %), and the inflation of a thick neo-Hookean tube by a follower pressure against Rivlin's closed form (0.08 % at the bore). A finite-strain Cook's membrane is pending its transcribed reference. docs/fem.md describes the formulation, the material point interface, the follower-pressure choice and what nonlinear steps refuse; the literature, parity and roadmap pages follow. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01NmAttHhUZTokgPeEJia8sm
38 lines
883 B
JSON
38 lines
883 B
JSON
{
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"note": "FieldCraft's accepted results for this case, written by `cargo xtask oracle --bless`. A result outside its band fails CI.",
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"values": {
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"u1": {
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"band": 5.6632559447764666e-11,
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"value": 0.056632559447764665
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},
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"u10": {
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"band": 5.579973985797526e-10,
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"value": 0.5579973985797526
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},
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"u2": {
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"band": 1.6132061646961728e-10,
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"value": 0.16132061646961726
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},
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"u5": {
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"band": 3.895481979257076e-10,
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"value": 0.3895481979257076
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},
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"v1": {
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"band": 3.02260079032045e-10,
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"value": 0.30226007903204494
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},
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"v10": {
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"band": 8.142088468220408e-10,
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"value": 0.8142088468220408
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},
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"v2": {
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"band": 4.945495713426414e-10,
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"value": 0.4945495713426413
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},
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"v5": {
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"band": 7.159758984663589e-10,
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"value": 0.7159758984663589
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}
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}
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}
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