January 2026

The release notes for the upcoming release are:

New features

• Elements

• Initial conditions:

  • Fluctuating fields with multiple correlation lengths

• Loads:

  • Renamed all springs to spring-ground-*
  • Added springs acting in global x-, y-, z-directions for beam elements and 3D elements

• Constitutive models

  • Hardening Soil: The Hardening Soil model with Matsuoka-Nakai failure surface with benchmarks given in the Benchmark Manual.

General modifications

• Stress and Strain output are now requested via stress and strain, respectively. The old keywords S and E are deprecated (backward compatibility is maintained).
• Barotropic elasticity was modified such that for void ratios smaller than \(e<10^{-3}\) the pyknotropy feature is deactivated

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Resolved bugs

• Resolved bug for *Equations where the coupling terms between two constrained degrees of freedom are inactive in the model

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Manuals

• Benchmark Manual

  • Hardening Soil with Matsuoka-Nakai failure surface

• Reference Manual

  • Improved documentation of the barotropic elasticity

• Theory Manual

  • Hardening Soil with Matsuoka-Nakai failure surface
  • Barotropic elasticity

• Tutorial Manual

  • Corrected erroneous material definition in the tutorials on oedometric compression, drained mon. triaxial test, undrained mon. triaxial test and undrained cyclic triaxial test