Release Notes — numgeo-GiD v2026.04

This version introduces several major enhancements and new features that expand the capabilities of the software for advanced finite element analysis.

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New Features

Dimension wizard

A new dimension wizard is now available at the start of the problem type, ensuring there is no confusion in the selection of model dimensions (2D, 3D, axisymmetric, etc.). The wizard prompts the user to confirm the working dimension before any geometry or mesh is defined, which prevents inconsistencies later in the modelling process.

Constitutive models

• Hardening Soil: The Hardening Soil model with Matsuoka-Nakai failure surface. For more information, see:

  • Reference manual
  • Benchmark manual

• Hypo-ISA-SF:Hypoplastic model for sand according to von Wollfersdorff (1996)\(^1\) with intergranular strain anisotropy (ISA) and semi-fluidized state (SF) extension (Tafili et al., 2024)\(^2\) refrence at bottom. For more information, see:

  • Reference manual
  • Benchmark manual

Accelerator:

Accelerator which gives a unified interface so methods desinged to improve convergence of the iterative solution process (implicit simulations). See the Reference and the Theory manuals for more information.

Anderson acceleration:

Anderson acceleration is a general technique for accelerating the convergence of fixed-point iterations (i.e. when the global Jacobian used in the Newton-Raphson iteration is not updated at every iteration or changes only mildly - for instance when an elastic tangent is used in place of the consistent elasto-plastic tangent). For more information please refer to the Reference and the Theory manuals.

Modelling Warnings

numgeo-GiD now displays context-aware warnings during model preparation to help users avoid common mistakes. Warnings cover incomplete element type, improper material assignments, mesh issues, unit/dimensional inconsistencies. Each warning includes a short explanation and a suggested corrective action, and is non-blocking by default.

Extended Mohr-Coulomb friction model incorporating dilatancy.

Release Date: 2026-04-28 Version: v2026.01 We’re thrilled to share this update and encourage all users to upgrade to benefit from the latest improvements and features.

References

1. P.-A. Wolffersdorff. A hypoplastic relation for granular materials with a predefined limit state surface. Mechanics of Cohesive-frictional Materials, 1(3):251–271, 1996. doi:10.1002/(SICI)1099-1484(199607)1:3<251::AID-CFM13>3.0.CO;2-3.
2. Merita Tafili, Jose Duque, David Mašín, and Torsten Wichtmann. A hypoplastic model for pre-and post-liquefaction analysis of sands. Computers and Geotechnics, 171:106314, 2024.