Linear Static 3D Euler Beam 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-3d-euler-beam
approved_design: docs/development-history.md (status: approved; approved 2026-08-08, amended 2026-08-09)
source_requirement: docs/linear-static-3d-euler-beam/requirements.md
source_research: docs/linear-static-3d-euler-beam/research.md
source_formulation: docs/linear-static-3d-euler-beam/formulation.md
source_numerical_review: docs/linear-static-3d-euler-beam/numerical-review.md
source_io_definition: docs/linear-static-3d-euler-beam/io.md
source_reference_model: docs/linear-static-3d-euler-beam/reference-model.md
source_implementation_plan: docs/linear-static-3d-euler-beam/README.md
source_implementation_report: docs/linear-static-3d-euler-beam/lessons.md
source_build_test_report: docs/linear-static-3d-euler-beam/verification.md
source_reference_verification_report: docs/linear-static-3d-euler-beam/verification.md
source_physics_evaluation_report: docs/linear-static-3d-euler-beam/verification.md
audited_head: 822b06be3d2128d5dfdc5e394078abbb9dcd5a50
reference_model_id: cantilever-beam-b33
reference_schema: abaqus-cae-report-csv-v0
reference_baseline: reference/cantilever beam/ at source commit 2b34d0b
historical_status: ready-for-release
current_status: superseded-pending-revalidation
superseded_on: 2026-08-18
date: 2026-08-10
final_review_source_head: b7a1258ce0f36a85b888e23470cf9d936a7595cd

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

This is an internal feature-readiness verdict. It authorizes no publish, deploy, package, tag, push, external release, or reference-artifact operation.

Known Limitations

limitation	category	user impact	disposition
Abaqus `TYPE=B31` / Timoshenko	element/input	rejected as `unsupported-element-formulation`; no shear-deformable beam behavior	documented, deferred feature
multiple analysis steps	analysis/input	a second `*STEP` is rejected; no step-to-step propagation	documented, deferred feature
instance transforms and nested/dependent assembly	model/input	translation/rotation and nested semantics are rejected	documented, deferred feature
`I12!=0` and section extensions	section/physics	coupled inertia, taper, offsets, releases, curved geometry, and warping are unsupported	documented, deferred feature
Abaqus `*DLOAD`	load/input	parser/CLI reject it; only the formulation-level constant local line-load kernel exists	documented, deferred feature
nonlinear/dynamic/contact/thermal	analysis/physics	no geometric/material nonlinearity, dynamics, contact, or thermal response	documented, deferred feature
shear and warping stress	output/physics	no transverse/torsional shear-stress or warping-stress recovery; no nodal averaging	documented, deferred feature
beam stress reference	verification	axial `S11` is mandatory and analytically/schema tested, but Abaqus stress reference is N/A	accepted contract N/A
approved four-file legacy exception	artifacts	spaces and legacy names remain; `metadata.json` is absent-allowed by project-wide policy, while `README.md` and stress CSV are N/A only for this bundle	read-only accepted filename/README exception; not precedent for new bundles
reference coverage	verification	single identity-axis local-z B33 cantilever does not itself cover axial/torsion/local-y/rotated/prescribed/line-load/nonzero-fiber stress	accepted; complementary analytical/unit portfolio passes
Euler-Bernoulli applicability	modeling	deep/short beams may be too stiff; no automatic slenderness threshold is approved	documented modeling limit
energy evidence	output	no HDF5 energy dataset; Step 27 derives positive `0.5F^Td` and uses rank/energy tests	accepted evidence limit
comparator file-type depth (Minor)	test evidence	test-only comparator pins float64 types but relies on writer self-check/full schema tests for exact uint64/compound/string file types	accepted defense-in-depth coverage limit
multi-source diagnostic order (Minor)	portability/future scope	sorter is sufficient for V0 single-input CLI but is not the future multi-source declaration/internal-ID ordering contract	accepted V0 limit
HDF5 `libmmd.dll` staging guard (Minor)	environment portability	unconditional guard is correct for approved shared-HDF5 environment; alternate HDF5 targets may need adjustment	accepted external portability limit
stale implementation aggregate header	documentation	top-level `in-progress` can confuse readers despite completed evidence	documented nonblocking stale header; upstream unchanged

Release Verdict

verdict: ready-for-release
status: ready-for-release
reason: all required upstream gates are present and passing, Steps 0-27 are completed, all 44 must requirements have complete acceptance/test/reference/disposition traceability, reference identity is unchanged, known limitations and accepted risks are documented, and no unresolved blocker exists.
authority_boundary: internal feature readiness only; no publish, deploy, package, tag, push, external release, or reference-artifact change is authorized. Harness-owned phase evidence commits remain part of the internal development workflow, not release publication.

Handoff Recommendation

target_agent	reason	required input
Coordinator Agent	Close the internal feature workflow with `ready-for-release`.	This report, exact three-gate reports, phase index Step 28 completion, and the documented authority boundary.
Correction Agent	N/A; no implementation-owned blocker exists.	N/A
Reference Verification Agent	N/A; required comparison passed.	N/A
Physics Evaluation Agent	N/A; required physics review passed.	N/A

No release engineering, packaging, publication, tag, push, or external coordination was performed. Harness/root phase-evidence commits are internal workflow records, not an external release action.

Open Issues

Blocking issues: none.
Nonblocking documentation issue: the implementation report aggregate status: in-progress is stale; completed Step blocks, phase index, and Step 25 fresh audit are authoritative for release closure. It remains unchanged to preserve upstream audit independence.
Resolved final-review finding: Step 26 now probes authoritative passed=true, and the exact acceptance command passes. The remaining Step 25 input-hash prose typo is nonblocking; later exact hashes and Git audits resolve identity without changing artifacts.
Nonblocking accepted Minors: comparator file-type defense-in-depth coverage, future multi-source diagnostic ordering, and alternate-HDF5 libmmd.dll staging portability remain as documented.
Deferred behavior is limited to the Known Limitations and is not claimed as supported.

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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