Mechanical results and original numerical checks
Process demonstration — unvalidated engineering estimates. Assumptions, transferred estimates and unresolved requirements remain explicit. This readable view does not change the source evidence.
Native CalculiX results for a reduced, prescribed-displacement pipe-beam model. These are numerical observations with provisional inputs, not physical validation.
The reported stress is an axial integration-point quantity with baseline subtraction, not a peak outer-surface or local contact stress. Global equilibrium remains not established. Original failed balance checks remain visible below.
Eight-case reduced mechanical comparison
| Closure (%) | Stiffness (N/mm) | Midspan displacement (mm) | Nodal gap (mm) | Spring force magnitude (N) | Added axial IP stress (MPa) | Equilibrium |
|---|
| 0 | 50 | 0 | 3.1 | 0 | 0 | not established |
| 50 | 50 | 1.55 | 1.55 | 77.5 | 6.406824 | not established |
| 80 | 50 | 2.48 | 0.62 | 124 | 10.25092 | not established |
| 100 | 50 | 3.1 | 0 | 155 | 12.81365 | not established |
| 0 | 20 | 0 | 3.1 | 0 | 0 | not established |
| 50 | 20 | 1.55 | 1.55 | 31 | 6.406824 | not established |
| 80 | 20 | 2.48 | 0.62 | 49.6 | 10.25092 | not established |
| 100 | 20 | 3.1 | 0 | 62 | 12.81365 | not established |
Original numerical checks — failures retained
| Check | Observed | Criterion | Result |
|---|
| fresh 000 complete | Yes | Not specified | PASS |
| fresh 000 displacement | 0 | 1e-05 | PASS |
| fresh 000 gap | 0 | 1e-05 | PASS |
| fresh 000 balance | 0 | 0.001 | PASS |
| fresh 000 spring | 0 | 0.001 | PASS |
| fresh 050 complete | Yes | Not specified | PASS |
| fresh 050 displacement | 0 | 1e-05 | PASS |
| fresh 050 gap | 0 | 1e-05 | PASS |
| fresh 050 balance | 0.97677 | 0.001 | FAIL |
| fresh 050 spring | 0 | 0.001 | PASS |
| fresh 080 complete | Yes | Not specified | PASS |
| fresh 080 displacement | 0 | 1e-05 | PASS |
| fresh 080 gap | 0 | 1e-05 | PASS |
| fresh 080 balance | 0.97677 | 0.001 | FAIL |
| fresh 080 spring | 0 | 0.001 | PASS |
| fresh 100 complete | Yes | Not specified | PASS |
| fresh 100 displacement | 0 | 1e-05 | PASS |
| fresh 100 gap | 0 | 1e-05 | PASS |
| fresh 100 balance | 0.97677 | 0.001 | FAIL |
| fresh 100 spring | 0 | 0.001 | PASS |
| softened 000 complete | Yes | Not specified | PASS |
| softened 000 displacement | 0 | 1e-05 | PASS |
| softened 000 gap | 0 | 1e-05 | PASS |
| softened 000 balance | 0 | 0.001 | PASS |
| softened 000 spring | 0 | 0.001 | PASS |
| softened 050 complete | Yes | Not specified | PASS |
| softened 050 displacement | 0 | 1e-05 | PASS |
| softened 050 gap | 0 | 1e-05 | PASS |
| softened 050 balance | 0.9438805 | 0.001 | FAIL |
| softened 050 spring | 0 | 0.001 | PASS |
| softened 080 complete | Yes | Not specified | PASS |
| softened 080 displacement | 0 | 1e-05 | PASS |
| softened 080 gap | 0 | 1e-05 | PASS |
| softened 080 balance | 0.9438806 | 0.001 | FAIL |
| softened 080 spring | 0 | 0.001 | PASS |
| softened 100 complete | Yes | Not specified | PASS |
| softened 100 displacement | 0 | 1e-05 | PASS |
| softened 100 gap | 0 | 1e-05 | PASS |
| softened 100 balance | 0.9438805 | 0.001 | FAIL |
| softened 100 spring | 0 | 0.001 | PASS |
Original DNBR requirement
| Item | Definition or value |
|---|
| Status | not established |
ESTIMATE — residual spring support
| Item | Definition or value |
|---|
| Scope | Proposal arithmetic for engineer review only; not a study result or calibrated grid prediction |
| Model card | basis/eol-reference-model-proposal-r1.json |
| Reference fluence n m2 | 6e+24 |
| Published fit stress ratio | 0.5021626 |
| Unity anchored alternative ratio | 0.5488116 |
| Slope sensitivity not confidence interval | Slope m2 n: 7.5e-26; Ratio: 0.5834298; Slope m2 n: 1e-25; Ratio: 0.5021626; Slope m2 n: 1.25e-25; Ratio: 0.4322154 |
| Exposure duration days if flux is constant within source range | 385.8025; 462.963 |
| Conditional preload mapping n | Spring: 2.510813; Dimple 1: 1.255407; Dimple 2: 1.255407 |
| Limitations | Extra numerical digits support reproducibility, not empirical precision. Time bounds are derived equivalent exposures, not observed operating dates. |
Source record and traceability
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SHA-256: 7d461f430db44186c5530dff460e99debd9b5d446cd3b2b126fc5eafa26e13d2
Presentation generated from this retained record. Historical status fields describe the source revision; later review decisions are explained on the engineering review page.