forked from 1b-agent/fieldcraft-upstream
jyvikoandClaude Opus 5.5
8ca2dddeec
Theory cases for the nonlinear solver, each frozen as a fixture: uniaxial stretch of a neo-Hookean block to twice its length (closed form), the nonlinear patch test on a distorted hex8 mesh, a quarter turn of the same mesh (objectivity: zero stress), the elastica of a hex20 cantilever at P L²/(E I) = 1, 2, 5, 10 against Bisshopp–Drucker (0.2–0.5 %), and the inflation of a thick neo-Hookean tube by a follower pressure against Rivlin's closed form (0.08 % at the bore). A finite-strain Cook's membrane is pending its transcribed reference. docs/fem.md describes the formulation, the material point interface, the follower-pressure choice and what nonlinear steps refuse; the literature, parity and roadmap pages follow. Co-Authored-By: Claude Opus 5.5 <[email protected]> Claude-Session: https://claude.ai/code/session_01NmAttHhUZTokgPeEJia8sm
8 lines
439 B
Markdown
8 lines
439 B
Markdown
# Cook's membrane at finite strain (pending)
|
|
|
|
Waits for its reference value: the finite-strain Cook's membrane is defined (load, μ, κ) and
|
|
answered in papers we have not transcribed, and no value is entered from memory. FieldCraft
|
|
solves the model today (hybrid hex20 one element thick in plane strain, or plane strain quad8 for
|
|
compressible materials); the case becomes active when the published numbers are copied in with
|
|
their table.
|