forked from 1b-agent/fieldcraft-upstream
jyvikoandClaude Opus 5.5
945a2076c3
Two oracle cases: the contact patch test on non-matching meshes in small and finite sliding, and Hertz's cylinder on a flat under force control (peak pressure, pressure distribution, subsurface stress). docs/fem.md describes the formulation, the literature survey its papers; ROADMAP M7 and parity are updated. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01UhhZMBTviDQxZvwnyP89fo
819 B
819 B
Contact patch test (implicit mortar contact, non-matching meshes)
Two unit cubes stacked along z, meshed independently: 3 × 3 × 2 hex8 below (graded in x and y),
2 × 2 × 2 above, so the nodes of the interface at z = 1 do not match. A frictionless contact pair
joins the lower block's top (main) and the upper block's bottom (secondary). The faces x = 0 and
y = 0 of both blocks are symmetry planes, the base z = 0 is held in z, and the top z = 2 is pushed
down by 0.02 (E = 1000, ν = 0.3) in two nonlinear static steps: Small without nonlinear
geometry (small sliding, mortar integrals in the reference configuration) and Finite with it
(finite sliding, searched and integrated on the deformed faces). The exact state is uniaxial
stress, uniform in both blocks, with a uniform contact pressure equal to it.