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Samples: the crank arm meshed structured from a partitioned half

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crank-arm (and crank-mirror, kept as the same model under the name of
its mirror workflow) now cut the crank on its symmetry plane and the
half into seven cells: across the arm at x = 30, 60, 110 and 148, and on
two diagonals radial to the pocket's corner fillets. Every cell's
cross-section maps (four-sided blocks, the half O-grids round the bores,
triangle primitives at the pocket's corners); exact edge seeds give each
cut the same divisions on both sides, so mesh.cells merges all six cuts
and mesh.mirror reflects the half: 7 710 hex20, scaled Jacobian min 0.37
(was 0.17, and 0.009 for the swept mirrored half), edge ratio at most
7.0. Root σxx ±62.43 MPa against M/Z 62.6 MPa, the spindle carries the
1500 N. The test asserts the quality floor. Gallery images regenerated.

Fixes #247

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01UhhZMBTviDQxZvwnyP89fo
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jyvikoandClaude Opus 5.5 authored and Irakli Kourtis committed 2026-10-14 23:17:20 -04:00
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commit 90948833e0
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README.md
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@@ -106,7 +106,7 @@ against a closed form or a reference solution ([docs/examples.md](docs/examples.
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<td width="33%" valign="top"><img src="docs/media/examples/bracket-hex.png" alt="Hex-meshed bracket" width="100%"><br><b>Hex-meshed bracket</b> (<code>bracket-hex</code>): the bracket split into 30 cells, meshed all-hex (hex20), von Mises</td>
<td width="33%" valign="top"><img src="docs/media/examples/crank-arm.png" alt="Bicycle crank arm" width="100%"><br><b>Bicycle crank arm</b> (<code>crank-arm</code>): an aluminium crank swept all-hex (hex20), a rider's weight on the pedal; root bending within 0.3 % of M/Z</td>
<td width="33%" valign="top"><img src="docs/media/examples/crank-arm.png" alt="Bicycle crank arm" width="100%"><br><b>Bicycle crank arm</b> (<code>crank-arm</code>): an aluminium crank meshed structured all-hex (hex20) from a partitioned half and its mirror image, a rider's weight on the pedal; root bending within 0.3 % of M/Z</td>
<td width="33%" valign="top"><i>No picture yet: the viewport does not draw flow results (M12).</i><br><b>Flow past a bracket</b> (<code>flow-past</code>): air past an L-bracket on the floor; lattice Boltzmann flow, the drag and the force on each face</td>
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