jyvikoandClaude Opus 5.5 227c4544ed solver: mortar contact in 2D models ...

Plane strain, plane stress and axisymmetric models take contact pairs and
general (self) contact on the linear edges of tri3 and quad4 elements:
edges oriented out of their elements, the edge mortar of fem with the
thickness or 2 pi r in the weights, the element's area over the edge's
length as the thickness under it, and the in-plane rows of the tangent
blocks. Verified by the contact patch test in plane strain and
axisymmetric (to 1e-9 small sliding, 1e-4 finite), Hertz's line contact
on quad4 edges (Johnson 1985, 4.3; equal to the hex8 model's to 1e-5),
and a hybrid rubber C-ring closing on itself that moves node for node as
the one-layer solid ring.

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

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..

bcs.rs

FEM foundation B: heat transfer and thermal stress (solids, 2D, explicit), coupled temperature–displacement, solve.heat (#45)

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check.rs

solver: mortar contact in 2D models

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constraints.rs

1D elements I: trusses (rod2, rod3), point masses, rotary inertia, springs and dashpots (#38)

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contact.rs

solver: mortar contact in 2D models

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discrete.rs

1D elements I: trusses (rod2, rod3), point masses, rotary inertia, springs and dashpots (#38)

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fluids.rs

Explicit X2: large deformation, J2 and Johnson-Cook plasticity, damage and erosion (M10)

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geometry.rs

The .modelcraft file, undo/redo on the journal, atomic saves and autosave recovery (M3) (#21)

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lib.rs

model: ties between surfaces

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loads.rs

FEM foundation B: heat transfer and thermal stress (solids, 2D, explicit), coupled temperature–displacement, solve.heat (#45)

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materials.rs

fem, model: Mooney-Rivlin and Yeoh hyperelasticity in nonlinear steps

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mesh.rs

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

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nodal.rs

fem: finite-strain material point, total Lagrangian elements and follower pressure

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sections.rs

fem: hybrid plane strain and axisymmetric elements

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sets.rs

model: ties between surfaces

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steps.rs

explicit: opt-in mass scaling to a target increment, the added mass reported

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tie.rs

model: ties between surfaces

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units.rs

Model definition: sets by geometry name, materials, sections, couplings, BCs, loads, steps, check (#16)

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