026-G09 Owner Closeout¶
Decision¶
026-G09 is closed as PASS_WITH_LIMITATIONS for the bounded contact
scope below. The decision does not promote friction, finite sliding, general
surface-to-surface contact, self-contact, a contact tangent across active-set
discontinuities, or any universal penalty policy.
The candidate penalty interval 1e4..1e6 is recorded as
EXPERIMENTAL_ONLY. No production interval and no conditioning cutoff are
approved by this closeout.
Qualified bounded scope¶
| Item | Scope |
|---|---|
| Formulation | Frictionless node-to-triangle penalty |
| Family | TET4 |
| Routes | linear_static, nonlinear_static, geometric_nonlinear_static |
| Search | Initial configuration only |
| Evidence | Lots 1, 2 and 3; bounded Code_Aster unilateral and CalculiX pre-contact comparators |
| Claim | Unilateral contact behavior, load-path transitions, retry/rollback and fail-closed diagnostics for the tested route |
The internal evidence includes 9/9 mesh/penalty rows, 5/5 contact-cycle paths, controlled retry/rollback, and 6/6 adversarial failure classifications from Lot 2. Lot 3 adds scalar and TET4 Code_Aster comparisons plus a CalculiX elastic pre-contact tie-breaker.
Requirement decisions¶
| Requirement group | Full | Bounded | Deferred limitation | Blocking |
|---|---|---|---|---|
| Lot 1/base | 2 | 5 | 1 | 0 |
| Lot 2 | 2 | 2 | 1 | 0 |
| Lot 3 | 0 | 4 | 1 | 0 |
| Total | 4 | 11 | 3 | 0 |
The complete machine-readable mapping is in
qualification/0_2_6/g09_owner_closeout.json.
External evidence and limitations¶
Code_Aster agrees with the scalar and active-branch observables within the declared adapter limits. On the deformable TET4 structural path, the active branch remains within limits, but exact unilateral and penalty formulations produce a complete-curve transition warning. The two recorded meshes are:
| Mesh | Overall U error | Overall gap error | Active U error | Transition warning |
|---|---|---|---|---|
8x4x4 |
4.339979885207582 % |
54.99121110155485 % |
4.024558464266181e-13 % |
4.339979885207582 % |
6x4x4 |
5.25653195006103 % |
57.00417573383535 % |
7.216449660063467e-13 % |
5.25653195006103 % |
The second transition warning is above the predeclared 5 % warning limit
and is retained as a mesh/formulation limitation. CalculiX remains a
pre-contact elastic tie-breaker; it is not a contact-law qualification.
Explicit exclusions¶
Friction, finite sliding, general surface-to-surface contact, self-contact, contact tangent qualification at active-set discontinuities, universal penalty selection, and contact qualification beyond the tested TET4 route are excluded. The candidate penalty range remains experimental and all later contact capabilities require their own evidence.
Provenance¶
- Lot 1 execution source:
341ff7111630f6244401ca82addc04414408b9b1. - Lot 2 execution source:
341e82d61a2074bd744c84c9c7a9140bd1ac0bb0. - Lot 3 execution source:
c76d4af39dc270a05596a53ef2d93baa9171c29b. - Evidence head before this closeout:
a4665c19ea5ec699db003686586dc4452b8df752. - External tool images and artifact digests are recorded in the Lot 3 manifest.
No functional solver code was modified for this closeout.