Issues

• Simplify form_groups: find loops once, assign to residuals, schedule a condensed DAG

  NumSim-Stack/numsim-materials#239 · Filter by author petlenz opened on Oct 30, 2026

• Epic: property engine 2 — hardening (finite-strain partials, engine split, hot path, one way to do it)

  NumSim-Stack/numsim-materials#237 · Filter by author petlenz opened on Oct 29, 2026

• Rewrite docs/writing_a_material.md for the engine-2 API, with a compiled example

  NumSim-Stack/numsim-materials#236 · Filter by author petlenz opened on Oct 29, 2026

• One way to do it: remove the old derivative outputs, local solvers and deprecated declarations

  NumSim-Stack/numsim-materials#235 · Filter by author petlenz opened on Oct 29, 2026

• Partials for non-symmetric tensors: full-9 layout, derivatives of F-derived values (finite strain)

  NumSim-Stack/numsim-materials#234 · Filter by author petlenz opened on Oct 29, 2026

• Engine benchmark and an allocation-free update()/differentiate()

  NumSim-Stack/numsim-materials#233 · Filter by author petlenz opened on Oct 29, 2026

• Split property_engine.h into separately tested units (no behaviour change)

  NumSim-Stack/numsim-materials#232 · Filter by author petlenz opened on Oct 29, 2026

• Epic: property engine 2 — inspectable graph, in-engine iteration, residual systems and derivative edges

  NumSim-Stack/numsim-materials#221 · Filter by author petlenz opened on Oct 27, 2026
  1

• Property engine: change propagation (deferred)

  NumSim-Stack/numsim-materials#220 · Filter by author petlenz opened on Oct 27, 2026

• Migrate materials to declared partials and residual systems

  NumSim-Stack/numsim-materials#219 · Filter by author petlenz opened on Oct 27, 2026

• Property engine: residual systems set up at run time (unknowns and equations from any nodes, Newton/Picard, implicit function theorem)

  NumSim-Stack/numsim-materials#218 · Filter by author petlenz opened on Oct 27, 2026

• Property engine: partial derivatives per callback, chain rule by forward accumulation

  NumSim-Stack/numsim-materials#217 · Filter by author petlenz opened on Oct 27, 2026

• History kinds: kinded<T, voigt, leg...> for rotation and STATEV storage (vectors, non-symmetric, reference configuration)

  NumSim-Stack/numsim-materials#216 · Filter by author petlenz opened on Oct 27, 2026

• History checkpoints within a step and cutbacks in the report loop

  NumSim-Stack/numsim-materials#215 · Filter by author petlenz opened on Oct 27, 2026

• Property engine: iteration groups, the fixed point moves into update()

  NumSim-Stack/numsim-materials#214 · Filter by author petlenz opened on Oct 27, 2026

• Move the host-neutral headers errors.h and external_state_source.h out of umat/

  NumSim-Stack/numsim-materials#212 · Filter by author petlenz opened on Oct 24, 2026
  2

• dev_projector: stale doc reference and release note (#204 follow-ups)

  NumSim-Stack/numsim-materials#209 · Filter by author petlenz opened on Oct 24, 2026

• Report runner: input validation, error context, CSV details (#201–#203 follow-ups)

  NumSim-Stack/numsim-materials#208 · Filter by author petlenz opened on Oct 24, 2026

• Material-point drivers: tangent_error, exception safety, duplicate control components (#200 follow-ups)

  NumSim-Stack/numsim-materials#207 · Filter by author petlenz opened on Oct 24, 2026

• material_point: guard after a failed evaluation, early host_owned check, const-correctness (#205 follow-ups)

  NumSim-Stack/numsim-materials#206 · Filter by author petlenz opened on Oct 24, 2026

• Remove the deprecated declaration API

  NumSim-Stack/numsim-materials#190 · Filter by author petlenz opened on Oct 23, 2026

• Property engine: small API issues from the review of #174-#183

  NumSim-Stack/numsim-materials#189 · Filter by author petlenz opened on Oct 23, 2026

• Property engine: invalidate on the write, not on get_mutable()

  NumSim-Stack/numsim-materials#186 · Filter by author petlenz opened on Oct 23, 2026

• Property engine: check reads of a material's own outputs

  NumSim-Stack/numsim-materials#185 · Filter by author petlenz opened on Oct 23, 2026

• Epic: split property evaluation, constitutive integration and the simulation driver

  NumSim-Stack/numsim-materials#184 · Filter by author petlenz opened on Oct 23, 2026
  2