Public evidence

mechanical.statics.cantilever_deflection

Machine-checked verification for calculation version 1.0.0 · tier engine_tested

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Verification

4/4 calculation tests · Production surface contract 6/6

Golden tests 2 / 2
Boundary tests 2 / 2
Property tests 0 / 0
Production surface contract 6 / 6
Engine tested Yes
Source checked Yes
Artifact integrity PASS
Production attestation Embedded snapshot: unpublished · Build schema 1.0.0 ready · Semantic contract ✓ · Attestation report not published on origin · Live production status STALE (8 capabilities; 189 remain CURRENT) @ 2026-09-23T21:48:15.717Z
Semantic contract PASS
Evidence attested at 2026-09-23T02:27:54.588Z
Last production check 2026-09-23T02:27:54.588Z
Public / cache —
Origin —
Supplemental domain review Not performed
Named expert review Not performed

release artifacts aligned PASS
schema output required declared PASS
schema valid input executes PASS
engine success output validates schema PASS
schema rejects incomplete input PASS
rest success payload validates schema PASS

Fingerprint sha256:121304f7a432fd86e01ed050a3da5525a96144bcc042c08ca1127c3f63df06ff

Input schema sha256:aaca9b7fc6ffeb395dd66540522740a2e3adcd4bf55b6ef70fcde071b059d559 · Output schema sha256:75978b35451fee0755b3f391b669adb9d525aafa60402f9e014cc032b0ef6e02 · Build-time SHA-256 digests prove published artifacts agree with each other (release_integrity.scope=workspace). Production attestation GETs canonical URLs twice (public/cached view and origin), including Capability HTML, via npm run attest:production --write (published at /.well-known/calculatorx-production-attestation.json) and fails if the public Capability page advertises a different calculation_version. This is artifact consistency, not an independent immutable release log.

Build & scope

Engine identity and declared limitations.

Tool: cantilever-deflection
Engine: cantilever-deflection
Engine build: 2026-09-23
Evidence core: 2026-09-23T21:47:50.265Z
Rendered: 2026-09-23T23:44:55.601Z
Last reviewed: —

Limitations

Cantilever fixed at one end
One concentrated load at the free end
I is an input
Not a simply supported span or a distributed load

Sources

Standards and references supporting this tool specification. Methods are listed separately — they are algorithms, not bibliographic sources.

Hibbeler, Mechanics of Materials — Deflection of beams — cantilever with a concentrated load at the free end
Supports: The deflection at the free end is P L³ / (3 E I) when the load sits at the tip of a cantilever.

Published checks

Golden, boundary, and property cases included in this evidence build.

ID	Kind	Status	Detail
`golden-tip`	golden	pass	Expected delta=128 · model=cantilever_deflection · Actual delta=128 · model=cantilever_deflection · P=48 · L=2 · E=1 · I=1 · solver=cantilever tip load · convention=Cantilever fixed at one end with one concentrated load at the free end. δ = P L³/(3 E I). Positive P is the positive deflection direction. I is an input. A simply supported span and a distributed load are their own pages.
`golden-sign`	golden	pass	Expected delta=-128 · Actual delta=-128 · model=cantilever_deflection · P=-48 · L=2 · E=1 · I=1 · solver=cantilever tip load · convention=Cantilever fixed at one end with one concentrated load at the free end. δ = P L³/(3 E I). Positive P is the positive deflection direction. I is an input. A simply supported span and a distributed load are their own pages.
`boundary-zero-length`	boundary	pass	Expected VALUE_MUST_BE_POSITIVE · Actual VALUE_MUST_BE_POSITIVE
`boundary-missing`	boundary	pass	Expected MISSING_REQUIRED_INPUT · Actual MISSING_REQUIRED_INPUT