NINI
70 lines
2.5 KiB
Markdown
70 lines
2.5 KiB
Markdown
# Step 10: mitc4-formulation-closure
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## Sprint Contract
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### Objective
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Close the MITC4 formulation decisions required before element implementation: transverse shear tying, local basis, integration ordering, drilling stiffness default, and Phase 1 output scope.
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### Required Reading
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- /AGENTS.md
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- /PROGRESS.md
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- /PLAN.md
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- /docs/README.md
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- /docs/HARNESS_ENGINEERING.md
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- /docs/PRD.md
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- /docs/NUMERICAL_CONVENTIONS.md
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- /docs/RESULTS_SCHEMA.md
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- /docs/MITC4_FORMULATION.md
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- /docs/VERIFICATION_PLAN.md
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### Scope
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- Update `docs/MITC4_FORMULATION.md` with the exact baseline formulas and implementation checklist needed for coding.
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- Resolve or explicitly defer R-004, R-005, R-006, and R-007.
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- Record literature/source basis and benchmark expectations without requiring local Abaqus execution.
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- Update ADR or PLAN only when a durable design decision changes.
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### Allowed Files
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- `docs/MITC4_FORMULATION.md`
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- `docs/RESULTS_SCHEMA.md`
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- `docs/VERIFICATION_PLAN.md`
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- `docs/ADR.md`
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- `PLAN.md`
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- `PROGRESS.md`
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- `phases/1-linear-static-mitc4/index.json`
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### Explicit Non-Goals
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- Do not implement C++ MITC4 code in this step.
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- Do not invent formulas from memory without documenting the source or derivation.
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- Do not expand Phase 1 outputs beyond resolved R-007.
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### Tests To Write First
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- No C++ tests are required unless executable formulation checks already exist.
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- Add documentation checklist items or review notes that can be evaluated before Step 11.
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### Reference Artifacts
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- None required. Existing `references/quad_01*` may inform future benchmark planning but is not a Phase 1 MITC4 acceptance case.
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### Acceptance Commands
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```bash
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python scripts/validate_workspace.py
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```
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### Evaluator Checklist
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- Transverse shear tying equations are explicit enough to implement.
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- Local shell basis construction is explicit for flat and non-flat quads.
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- Drilling stiffness default scale and parameter name are finalized.
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- Integration ordering and output scope are finalized or explicitly deferred with downstream blockers.
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- Step 11 remains blocked if any required formulation item is unresolved.
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### Handoff Requirements
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- Record closed decisions and remaining risks in `PROGRESS.md`.
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- Remove or update resolved readiness tasks in `PLAN.md`.
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- Update the matching phase index entry: use `completed` with a one-line `summary`, or `blocked` with `blocked_reason`, or `error` with `error_message`.
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## Verification
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1. Run the acceptance command.
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2. Review docs for implementable formulas and unresolved placeholders.
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## Do Not
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- Do not let implementation begin on undocumented MITC4 formulas.
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