Release Notes – Akselos Modeler 2026

Solver

1. Finite Strain Hypoelastic Implementation: Up to now Akselos provided hyperelastic implementations of geometric nonlinearity. We now also provide an alternative hypoelastic implementation for solids and shells. This can be enabled by ticking the Hypoelastic checkbox under Geometric nonlinearity options.

Solver

2. Temperature-Dependent RB-FEA Solves with Sub-steps: RB-FEA solves with sub-steps now support temperature-dependent materials and varying temperatures. Temperature is interpolated on each sub-step, so RB-FEA and Hybrid models produce correct results when temperature changes during the solve with substepping enabled.

Solver

3. Prestress for Structural Harmonic Analysis: Structural harmonic analysis now supports prestress. The effect of a preload, such as bolt pretension or static loads, is included in the harmonic response, making it easier to analyse vibration of preloaded structures.

Akselos SDK

Auto-Detect and Create Ports API: The new auto_detect_and_create_ports_command finds where components touch in a model, then creates and connects ports there automatically. It detects solid face-to-face and shell edge-to-edge contact, which helps when setting up models imported without predefined ports. It is available in the SDK only, with no Modeler UI yet.

Akselos Modeler and Post-processing

Faster Node Search in Inspect Solution: Faster Node Search in Inspect Solution.

Solver

Updates to HEX8 Hourglass Stabilization: Previously HEX8 hourglass stabilization was enabled only based on the assumed strain method of Belytschko & Bindeman 1993. Now a second method has been added based on artificial hourglass stiffness, following Flanaghan & Belytscho 1981.