forked from 1b-agent/fieldcraft-upstream
jyvikoandClaude Opus 5.5
7a69fe5e2f
Four cases, each against its closed form: uniaxial tension of a J2 cube to a logarithmic strain of 0.2 (Kirchhoff stress exact; 0.13 % from the explicit solver's hypoelastic Cauchy stress, the elastic volume change between the two laws), the Bauschinger effect of linear kinematic hardening on a load path back to zero strain (exact), Hill's elastic-perfectly plastic thick cylinder (bore displacement at a plastic radius of 1.5a within 0.009 %, collapse pressure within 2e-8; the pending case is now active) and a cantilever's plastic collapse, converged 3.1 % above beam theory's hinge, the bound a continuum exceeds. docs/fem.md, the literature, ROADMAP (M15), parity and the oracle page follow. Co-Authored-By: Claude Opus 5.5 <[email protected]> Claude-Session: https://claude.ai/code/session_01NmAttHhUZTokgPeEJia8sm
16 lines
2.0 KiB
JSON
16 lines
2.0 KiB
JSON
[
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{"command": "mesh.block", "params": {"body": "Pipe", "kind": "quad8", "corners": [[10.0, 0, 0], [20.0, 0, 0], [20.0, 1, 0], [10.0, 1, 0]], "divisions": [20, 1], "bias": [1, 1], "edges": [{"corners": [1, 4], "name": "bore"}, {"corners": [1, 2], "name": "bottom"}, {"corners": [3, 4], "name": "top"}]}},
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{"command": "model.set.create", "params": {"name": "all", "geometry": [{"body": "Pipe", "face": "area"}]}},
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{"command": "model.set.create", "params": {"name": "bore", "geometry": [{"body": "Pipe", "edge": "bore"}]}},
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{"command": "model.set.create", "params": {"name": "ends", "geometry": [{"body": "Pipe", "edge": "bottom"}, {"body": "Pipe", "edge": "top"}]}},
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{"command": "model.material.create", "params": {"name": "Steel", "elastic": {"type": "isotropic", "young": 200000.0, "poisson": 0.4999}, "plastic": {"type": "bilinear", "yield_stress": 250.0}}},
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{"command": "model.section.create", "params": {"name": "pipe", "set": "all", "material": "Steel", "kind": {"type": "axisymmetric"}, "formulation": {"integration": "reduced"}}},
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{"command": "model.boundary_condition.create", "params": {"name": "ends", "type": "symmetry", "target": {"set": "ends"}, "plane": "y"}},
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{"command": "model.load.create", "params": {"name": "p", "type": "pressure", "set": "bore", "magnitude": 180.19538034924005}},
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{"command": "model.boundary_condition.create", "params": {"name": "expand", "type": "displacement", "target": {"set": "bore"}, "values": [0.3, null, null, null, null, null]}},
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{"command": "model.step.create", "params": {"name": "Pressure", "procedure": {"type": "nonlinear_static", "nonlinear_geometry": false}, "boundary_conditions": ["ends"], "loads": ["p"]}},
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{"command": "model.step.create", "params": {"name": "Collapse", "procedure": {"type": "nonlinear_static", "nonlinear_geometry": false}, "boundary_conditions": ["ends", "expand"], "loads": []}},
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{"command": "solve.nonlinear", "params": {"step": "Pressure"}, "id": "pressure"},
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{"command": "solve.nonlinear", "params": {"step": "Collapse"}, "id": "collapse"}
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]
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