AgentFEM 0.2.4

AgentFEM 0.2.4 deepens the high-temperature and cyclic inelastic workflow without creating a second user language. The public path remains:

Study -> Model -> scientific assets -> model.step(...) -> SimulationResult

Cyclic plasticity

constitutive.chaboche(...) adds exponential isotropic saturation and one or more Armstrong--Frederick backstresses to the existing global small-strain J2 route. It uses committed/trial quadrature state, global Newton equilibrium, non-monotone tabular amplitudes, rollback/cutback, and restart. Results expose S, PE, PEEQ, total backstress ALPHA, MISES, and their presentation fields.

Material-point shifted-yield, tangent and reversal tests are combined with a global cyclic and checkpoint-equivalence test. The implementation follows the public Abaqus combined-hardening definition and published-style parameters; it remains experimental until a structure-level stabilized-hysteresis curve and complete dynamic-recovery energy closure are accepted.

Sequential heat, creep and evidence

Accepted FieldHistory archives now retain the source Study, procedure and one-way transfer role in addition to time, interpolation, range policy and content identity. assessments.sequential_energy_ledger(...) links this handoff while keeping thermal and mechanical residuals in separate layers. It does not construct a fictitious monolithic conservation error.

DwellInterval and creep_fatigue_from_result(...) form the engineering V1 result consumer. They extract governing stress and temperature from named histories, call a project-owned rupture-time relation with an explicit source, and combine the resulting creep time fraction with the existing fatigue assessment and declared interaction diagram. No design-code or material data is embedded in the open core.

Compatibility and release boundary

Existing linear-isotropic J2 checkpoints retain the released v4 schema. Chaboche checkpoints use an extensible v6 state-variable list. The release does not claim plane-stress or finite-strain cyclic plasticity, a coupled creep--fatigue damage law, monolithic thermo-mechanics, or qualification to a particular high-temperature design code.

The release gate requires the full serial suite, MPI suites, scientific knowledge generation, strict documentation build, clean wheel/sdist, installed-wheel identity, project templates, and representative workflow smokes.