forked from 1b-agent/fieldcraft-upstream
jyvikoandClaude Opus 5.5
8ca2dddeec
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 <[email protected]> Claude-Session: https://claude.ai/code/session_01NmAttHhUZTokgPeEJia8sm
42 lines
980 B
JSON
42 lines
980 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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"sxx": {
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"band": 4.2296179707574264e-8,
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"value": 42.29617970757426
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},
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"sxy": {
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"band": 8.89712243927903e-10,
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"value": -0.8897122439279029
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},
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"sxz": {
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"band": 1.8906385180297377e-9,
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"value": -1.8906385180297376
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},
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"syy": {
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"band": 2.3501008558807953e-8,
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"value": 23.501008558807953
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},
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"syz": {
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"band": 1.9462455331453503e-9,
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"value": 1.9462455329577204
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},
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"szz": {
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"band": 3.14528117370872e-8,
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"value": 31.452811737087195
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},
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"ux": {
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"band": 1.3583340405308903e-10,
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"value": 0.13583340405308902
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},
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"uy": {
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"band": 3.4874913736454575e-13,
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"value": 0.0003487491350470007
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},
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"uz": {
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"band": 2.3985080233668645e-12,
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"value": -0.002398508023366864
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}
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}
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}
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