mechanical.statics.bending_stress

Three distinct suites: educational examples on the calculator page, this legacy regression count (6/6 golden + boundary), and the CVP verification suite below. They are not the same number. Property, metamorphic, round-trip, O3, and interface statuses/checks are recorded in the CVP Manifest . SKIP (0/0) means that suite has no published vectors.

This calculator CURRENT · Public schema 1.0.0 matches · Semantic contract ✓ · Production attested · Public/cache ✓ · Origin ✓

CVP verification suite

Protocol checks from the Evidence Manifest. Distinct from the legacy regression suite above. Verification revision 2026-09-27.o2-o3. Calculation version 1.0.0. CVP 1.0.0-proposed. 4/4 golden · 3/3 CVP boundary · 5/5 invalid · 1/1 property · 1/1 metamorphic · 8/8 O3 · 2/2 cross-interface · 6/6 CVP contract. digest 2dc6e2ca9a7c. O2: σ = M/S vs a separate-module identity (≤2 ULP). Not plastic modulus, not a rectangle from b·h, and not beam deflection. ≤2 ULP vs O3 applies only to the published tabulated bending-stress vectors. Not plastic modulus.

• Golden (oracle-backed) 4 / 4
• CVP boundary 3 / 3
• Invalid input 5 / 5
• Property 1 / 1
• Metamorphic 1 / 1
• O3 high-precision 8 / 8
• Cross-interface 2 / 2
• CVP contract 6 / 6
• Interfaces PASS · UI (SSR) / REST / MCP
• Interface claim ui-ssr is query-result HTML, not a live browser session. Error-path engine·REST·MCP 1/1 (status, code, calculation_version). SSR compared on URL-canonical requested calculations; empty query is idle (not an error) and JSON-typed object/array inputs are REST/MCP-only.
• Verified scope σ = M/S on one centroidal axis; S given or S = Ix/c; + O3 mpmath tabulated σ.
• Assurance Engineering
• Deferred Not plastic modulus, not a rectangle from b·h, and not beam deflection.

• 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 sha256:291713ddc89c6c7e4540c5dc87110f09eb98615ed09f6e1faa213efe80e4eb08

Input schema sha256:a9646269e346733a5a8bba184308a67f76135bdcae9bacf0e293bfe0757da00f · Output schema sha256:63e782554c686f896cea624f8f251f12f5d68f8495a8c44ad2cd25e55a4dcd75 · 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.

Tool

bending-stress

Engine

bending-stress

Engine build

2026-09-27

Evidence core

2026-09-27T08:15:46.336Z

Rendered

2026-11-10T05:18:42.176Z

Last reviewed

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Limitations

• One centroidal axis
• σ = M/S
• S = Ix/c when S is omitted
• Not a rectangle built from b and h
• Not transverse shear, deflection, or a plastic modulus