Linear Static MITC4 Shell Release Report

본 문서는 당시 revision의 검증·판정 기록이다. 본문에 남긴 원본 보고서 이름과 SHA-256은 통합 전 자료의 식별자이며 정리된 현재 파일의 byte hash를 뜻하지 않는다. 원문은 Git 858e87b의 해당 기능 폴더에서 확인할 수 있다. 현재 진입점과 대응 기록은 README를 따른다.

Metadata

feature_id: linear-static-mitc4-shell
source_requirement: docs/linear-static-mitc4-shell/requirements.md
source_research: docs/linear-static-mitc4-shell/research.md
source_formulation: docs/linear-static-mitc4-shell/formulation.md
source_numerical_review: docs/linear-static-mitc4-shell/numerical-review.md
source_io_definition: docs/linear-static-mitc4-shell/io.md
source_reference_model: docs/linear-static-mitc4-shell/reference-model.md
source_implementation_plan: docs/linear-static-mitc4-shell/README.md
source_implementation_evidence: phases/linear-static-mitc4-shell/index.json
source_implementation_report: N/A; the project Harness phase index is the implementation completion ledger for this execution
source_correction_report: N/A; no final Build/Test, Reference Verification, or Physics Evaluation failure was handed to Correction Agent
source_build_test_report: docs/linear-static-mitc4-shell/verification.md
source_reference_verification_report: docs/linear-static-mitc4-shell/verification.md
source_physics_evaluation_report: docs/linear-static-mitc4-shell/verification.md
audited_source_head: 820ba30c717b3d0e113775608e20dfd5fbc05d53
audited_branch: feat-linear-static-mitc4-shell
historical_status: ready-for-release
current_status: superseded-pending-revalidation
superseded_on: 2026-08-18
date: 2026-08-13
release_boundary: internal FESA feature release readiness only; no publish, deploy, package, tag, commit, or external release was performed

The readiness evidence below is historical. The 2026-08-18 common-policy reference revalidation passed, but fresh physics and release audits are still required before a current ready-for-release verdict may be issued.

Known Limitations

limitation	category	user impact	disposition
One small-displacement/small-rotation linear-static step only	analysis	Nonlinear, buckling, modal, dynamic, contact and thermal models are rejected/not executed.	documented
S4 and S4R are source labels for one full-integration FESA-MITC4 formulation	input/numerical	No Abaqus S4/S4R internal algorithm, reduced-integration or hourglass equivalence is claimed.	documented
External acceptance uses one flat symmetric fully clamped S4 plate	verification	General curved/distorted/thin-thick convergence is not established by the source-solver comparison.	accepted risk; optional future evidence
Original MITC4 membrane field is unmodified	numerical	Distorted curved meshes may exhibit membrane locking; MITC4+ performance is not claimed.	documented
S4R has no blocking Abaqus reference comparison	verification	S4R support is proven by parser/common-kernel/deterministic-assembly/HDF5 metadata tests only.	approved boundary
Homogeneous isotropic centered single layer with constant thickness	material/section	Composite, orthotropic, offset and variable-thickness models are unsupported.	documented
Smooth geometry-derived director field only	geometry	Explicit normals and shared-node folds/hinges/intersections are unsupported; folds require duplicated nodes.	documented
Nodal loads/constraints only	load	Pressure, gravity, DLOAD, body/edge/follower load are unsupported. Director-parallel moments fail as `unsupported-drilling-load`.	documented
Fixed numerical drilling stabilization	numerical	It is not a physical strain/load/result channel; no calibration sweep or drilling-energy ratio is supplied.	accepted fixed policy
In-plane stress only at bottom/middle/top	output	`S33` is a plane-stress assumption; `S13/S23` point stress and nodal averaging are not emitted.	documented
Raw HDF5 container bytes are not a declared deterministic identity	output/evidence	Regeneration may change the raw file hash; ordered projected rows and the JSON comparison ledger are deterministic evidence.	documented, nonblocking
Target-wide CTest label remains the legacy beam label	test infrastructure	MITC4 selection uses the approved exact suite regexes instead of a dedicated label.	documented, nonblocking

Release Verdict

verdict: ready-for-release
reason: all required upstream gates are present and passing; the final three mandatory handoff statuses are exactly pass-for-reference-verification, pass-for-physics-evaluation, and pass-for-release-agent; every must requirement 001-072 has a released disposition; required S4 artifacts and row mappings are present and valid; no unresolved defect, missing comparison file, tolerance conflict, nonfinite result, identity gap, or physics blocker remains.
approval_scope: internal feature release closure only
external_release_action: none

Handoff Recommendation

target_agent	reason	required_input
Coordinator Agent	Close the feature workflow with `ready-for-release`.	This report, source HEAD `820ba30c717b3d0e113775608e20dfd5fbc05d53`, and the three passing downstream gate reports.
Correction Agent	N/A; no implementation-owned release blocker remains.	N/A
Reference Verification Agent	N/A; the required S4 comparison is complete and passing.	N/A
Physics Evaluation Agent	N/A; physics evaluation is complete and passing.	N/A

Open Issues

blocking: none
deferred requirements: none
unresolved defects: none
missing required comparison files or mappings: none
nonblocking administrative note: the Build/Test, Reference Verification, Physics Evaluation and this Release report are untracked workspace reports pending whatever repository-integration action the user or Coordinator Agent separately authorizes. Their untracked state does not invalidate their content or the current internal readiness verdict.
nonblocking evidence note: raw results.h5 hashes can differ across valid regenerations; no byte-identical HDF5 container claim is made.

현재 build·reference·물리 실행 기록은 검증 보고서에 통합했다. 과거 readiness와 현재 재검증 필요를 구분하며 이 정리는 새로운 release 감사가 아니다.

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