{ "record_type": "room_virtual_push", "push": "VP6", "topic": "stroke-envelope", "date": "2026-10-03", "label": "SIMULATED", "question": "Where does the 25.8 mm/10 m model stroke vs the 2.5-3 mm/10 m quoted band diverge, and what design envelope resolves it?", "judged_by": [ { "file": "next-stage/build/e7-assembly/stackup.py", "sha256": "f841cf292942e2f5a4a52e85c5fff5460df1d48943ec682661e177bd098ea272" }, { "file": "next-stage/build/e7-assembly/duty_spec.json", "sha256": "ab29ceb684e2829f0b0266e30b6936a538fd2ce7c31ee0afd17e03f285f2da07" } ], "seed": "engine-frozen (deterministic arithmetic, no RNG)", "assumptions": [ "constants exactly stackup.py: E 190 GPa, alpha 14e-6/K, limit 0.8 x yield (assumed/proposed as labeled there); grades L-80 552 MPa (verified, API 5CT) and TN125SS 862 MPa (assumed, grade-name basis)", "dT grid 50-500 K spans the S1 measured quench class (350 K) to the S2 spec transient (500-150 K)" ], "limits": [ "[MODEL] screening arithmetic, not FEA; the campaign verifies the number (DUTY-SPEC.md \u00a74) \u2014 the model does not decide it.", "Fully constrained axial stress is the bounding simplification; real joints see bending, pressure and friction (E7 campaign measures the assembly)." ], "house_rules": [ "pump/treatment electricity stays separate from recovered output", "redistributed flow is never counted as new heat", "box fractions are never probabilities (CLAIM-TRACE S1)", "analysis alone is not qualification \u2014 zero measured duty hours (IEEE Std 323)" ], "frozen_point": { "dT_k": 350.0, "grade": "L-80", "stroke_required_mm_per_10m": 25.758, "relief_strain_required": 0.002576, "quoted_band_mm_per_10m": [ 2.5, 3.0 ] }, "divergence_reading": { "literal_mm_reading": "model stroke 25.758 mm per 10 m vs quoted 2.5-3.0 mm per 10 m \u2014 the literal reading diverges by ~10x", "strain_reading": "relief strain required 0.0026 sits inside the 2.5-3.0e-3 band read as relief strain", "strain_band_hit": true, "resolution": "the 2.5-3 figure is a relief-strain number (2.5-3e-3, per meter), not millimeters of stroke per 10 m; the E7 campaign verifies which reading the hardware needs (DUTY-SPEC.md \u00a74)" }, "cells": [ { "grade": "L-80", "yield_mpa": 552.0, "dT_k": 50.0, "sigma_th_mpa": 133.0, "relief_strain_required": -0.001624, "stroke_required_mm_per_10m": -16.242, "holds_with_literal_3mm_per_10m": true, "sigma_with_literal_3mm_mpa": 76.0, "limit_mpa": 441.6 }, { "grade": "L-80", "yield_mpa": 552.0, "dT_k": 100.0, "sigma_th_mpa": 266.0, "relief_strain_required": -0.000924, "stroke_required_mm_per_10m": -9.242, "holds_with_literal_3mm_per_10m": true, "sigma_with_literal_3mm_mpa": 209.0, "limit_mpa": 441.6 }, { "grade": "L-80", "yield_mpa": 552.0, "dT_k": 150.0, "sigma_th_mpa": 399.0, "relief_strain_required": -0.000224, "stroke_required_mm_per_10m": -2.242, "holds_with_literal_3mm_per_10m": true, "sigma_with_literal_3mm_mpa": 342.0, "limit_mpa": 441.6 }, { "grade": "L-80", "yield_mpa": 552.0, "dT_k": 200.0, "sigma_th_mpa": 532.0, "relief_strain_required": 0.000476, "stroke_required_mm_per_10m": 4.758, "holds_with_literal_3mm_per_10m": false, "sigma_with_literal_3mm_mpa": 475.0, "limit_mpa": 441.6 }, { "grade": "L-80", "yield_mpa": 552.0, "dT_k": 250.0, "sigma_th_mpa": 665.0, "relief_strain_required": 0.001176, "stroke_required_mm_per_10m": 11.758, "holds_with_literal_3mm_per_10m": false, "sigma_with_literal_3mm_mpa": 608.0, "limit_mpa": 441.6 }, { "grade": "L-80", "yield_mpa": 552.0, "dT_k": 300.0, "sigma_th_mpa": 798.0, "relief_strain_required": 0.001876, "stroke_required_mm_per_10m": 18.758, "holds_with_literal_3mm_per_10m": false, "sigma_with_literal_3mm_mpa": 741.0, "limit_mpa": 441.6 }, { "grade": "L-80", "yield_mpa": 552.0, "dT_k": 350.0, "sigma_th_mpa": 931.0, "relief_strain_required": 0.002576, "stroke_required_mm_per_10m": 25.758, "holds_with_literal_3mm_per_10m": false, "sigma_with_literal_3mm_mpa": 874.0, "limit_mpa": 441.6 }, { "grade": "L-80", "yield_mpa": 552.0, "dT_k": 400.0, "sigma_th_mpa": 1064.0, "relief_strain_required": 0.003276, "stroke_required_mm_per_10m": 32.758, "holds_with_literal_3mm_per_10m": false, "sigma_with_literal_3mm_mpa": 1007.0, "limit_mpa": 441.6 }, { "grade": "L-80", "yield_mpa": 552.0, "dT_k": 450.0, "sigma_th_mpa": 1197.0, "relief_strain_required": 0.003976, "stroke_required_mm_per_10m": 39.758, "holds_with_literal_3mm_per_10m": false, "sigma_with_literal_3mm_mpa": 1140.0, "limit_mpa": 441.6 }, { "grade": "L-80", "yield_mpa": 552.0, "dT_k": 500.0, "sigma_th_mpa": 1330.0, "relief_strain_required": 0.004676, "stroke_required_mm_per_10m": 46.758, "holds_with_literal_3mm_per_10m": false, "sigma_with_literal_3mm_mpa": 1273.0, "limit_mpa": 441.6 }, { "grade": "TN125SS", "yield_mpa": 862.0, "dT_k": 50.0, "sigma_th_mpa": 133.0, "relief_strain_required": -0.002929, "stroke_required_mm_per_10m": -29.295, "holds_with_literal_3mm_per_10m": true, "sigma_with_literal_3mm_mpa": 76.0, "limit_mpa": 689.6 }, { "grade": "TN125SS", "yield_mpa": 862.0, "dT_k": 100.0, "sigma_th_mpa": 266.0, "relief_strain_required": -0.002229, "stroke_required_mm_per_10m": -22.295, "holds_with_literal_3mm_per_10m": true, "sigma_with_literal_3mm_mpa": 209.0, "limit_mpa": 689.6 }, { "grade": "TN125SS", "yield_mpa": 862.0, "dT_k": 150.0, "sigma_th_mpa": 399.0, "relief_strain_required": -0.001529, "stroke_required_mm_per_10m": -15.295, "holds_with_literal_3mm_per_10m": true, "sigma_with_literal_3mm_mpa": 342.0, "limit_mpa": 689.6 }, { "grade": "TN125SS", "yield_mpa": 862.0, "dT_k": 200.0, "sigma_th_mpa": 532.0, "relief_strain_required": -0.000829, "stroke_required_mm_per_10m": -8.295, "holds_with_literal_3mm_per_10m": true, "sigma_with_literal_3mm_mpa": 475.0, "limit_mpa": 689.6 }, { "grade": "TN125SS", "yield_mpa": 862.0, "dT_k": 250.0, "sigma_th_mpa": 665.0, "relief_strain_required": -0.000129, "stroke_required_mm_per_10m": -1.295, "holds_with_literal_3mm_per_10m": true, "sigma_with_literal_3mm_mpa": 608.0, "limit_mpa": 689.6 }, { "grade": "TN125SS", "yield_mpa": 862.0, "dT_k": 300.0, "sigma_th_mpa": 798.0, "relief_strain_required": 0.000571, "stroke_required_mm_per_10m": 5.705, "holds_with_literal_3mm_per_10m": false, "sigma_with_literal_3mm_mpa": 741.0, "limit_mpa": 689.6 }, { "grade": "TN125SS", "yield_mpa": 862.0, "dT_k": 350.0, "sigma_th_mpa": 931.0, "relief_strain_required": 0.001271, "stroke_required_mm_per_10m": 12.705, "holds_with_literal_3mm_per_10m": false, "sigma_with_literal_3mm_mpa": 874.0, "limit_mpa": 689.6 }, { "grade": "TN125SS", "yield_mpa": 862.0, "dT_k": 400.0, "sigma_th_mpa": 1064.0, "relief_strain_required": 0.001971, "stroke_required_mm_per_10m": 19.705, "holds_with_literal_3mm_per_10m": false, "sigma_with_literal_3mm_mpa": 1007.0, "limit_mpa": 689.6 }, { "grade": "TN125SS", "yield_mpa": 862.0, "dT_k": 450.0, "sigma_th_mpa": 1197.0, "relief_strain_required": 0.002671, "stroke_required_mm_per_10m": 26.705, "holds_with_literal_3mm_per_10m": false, "sigma_with_literal_3mm_mpa": 1140.0, "limit_mpa": 689.6 }, { "grade": "TN125SS", "yield_mpa": 862.0, "dT_k": 500.0, "sigma_th_mpa": 1330.0, "relief_strain_required": 0.003371, "stroke_required_mm_per_10m": 33.705, "holds_with_literal_3mm_per_10m": false, "sigma_with_literal_3mm_mpa": 1273.0, "limit_mpa": 689.6 } ], "design_envelope": [ { "grade": "L-80", "dT_max_with_literal_3mm_per_10m_k": 187.4, "dT_max_zero_relief_needed_k": 166.0 }, { "grade": "TN125SS", "dT_max_with_literal_3mm_per_10m_k": 280.7, "dT_max_zero_relief_needed_k": 259.2 } ] }