PiecewiseElasticity

This plugin implements a tetrahedron-based elasticity with a strain-dependent Young’s modulus. It includes TetrahedronFEMForceFieldPWE, a force field derived from SOFA’s TetrahedronFEMForceField.

Instead of assigning one constant stiffness to the whole simulation, the component selects Young’s modulus from user-defined strain intervals. This is a practical way to approximate nonlinear or asymmetric stress-strain behavior while retaining a tetrahedral FEM model.

Features

• Strain-dependent, piecewise Young’s modulus for tetrahedral FEM models
• Any number of strictly increasing strain thresholds
• Optional linear smoothing near positive and negative thresholds
• A sensor–actuator measurement direction that determines the strain used for selection
• A reproducible tension/compression example, result CSV files, plots, and demonstration videos

Citations

If this project supports your work, please cite the software metadata.

Back to the plugin list