jyvikoandClaude Opus 5.5 0bb1c2462f solver, model: imperfections from buckling modes in nonlinear steps ...

NonlinearStatic.imperfection {step, mode, scale}: the buckling step's mode, scaled to a largest
component of `scale`, is added to the node coordinates before the step is solved, with a warning
naming it; Abaqus and LS-DYNA decks refuse it by name. A clamped–free column with its first mode
as imperfection under half its buckling load amplifies it by 1/(1 − α) within 2.8 %.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01UhhZMBTviDQxZvwnyP89fo

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..

src

solver, model: imperfections from buckling modes in nonlinear steps

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tests

solver, model: imperfections from buckling modes in nonlinear steps

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Cargo.toml

Tet mesh quality: one validity criterion, Delaunay refinement, ODT, Klingner–Shewchuk, tet10

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