PIE·INDUSTRIAL
Case study B · CalculiX-certified

A combustion-chamber sector coupon, solver-verified and print-ready.

solver run · check these numbers against their artifacts

A curved Inconel 625 combustion-chamber sector test coupon, built to a turbojet OEM's publicly documented envelope. A public-reference demonstrator, ready for bench testing — not engine-validated hardware.

Curved annular-sector test coupon, rendered from the print-ready STL Internal unit-cell lattice geometry of the sector coupon
The annular-sector coupon and its internal unit cell — rendered from the print-ready STLs. 153.5 mm public scale anchor; no proprietary geometry, no proprietary load cases.

The solver chain it passed

The solver chain the sector coupon passed. Each row gives one verification stage, the tool that ran it, and the result it returned.
StageToolResult
Mesh integrity manifold audit 134,608 triangles, watertight, 0 open edges
Manufacturability LPBF gates pass — continuous purge path, powder access, overhang
Volume mesh Gmsh 98,691 nodes / 406,889 tets
Structural FEA CalculiX axial E = 136.72 GPa · first yield 165.01 MPa
Steady conduction CalculiX 7.970 W/mK effective · 0.2% vs fast model
Pore-scale flow D3Q19 LBM k = 410.6 µm² · converged, 1,400 iterations

Claim discipline: the technical report this coupon shipped in had its 10 headline numbers machine-compiled against the solver evidence — verdict ALL_TRACED. This website's numbers get the same treatment.

What exists today

  • Print-ready 3MF/STL files with SHA-256 sums
  • Full solver-evidence JSONs for every stage above
  • A proposed physical test matrix: dimensional/micro-CT, cold-flow ΔP, thermal coupon, mechanical, thermal cycling

The intended loop: a partner prints the coupon, runs the bench tests, and the measurements feed back into the engine's ground-truth ledger — so the next design generation is calibrated against physical reality, not a textbook.

Back to evidence Bench-test it with us