We provide hints and tips to help you get started with the basic program RFEM.
KB 000968 | Yield Laws in Isotropic Nonlinear Elastic Material Model
Video
First Steps with RFEM
Description
In the "Material Model - Isotropic Nonlinear Elastic" window, you can select the yield laws according to von Mises, Tresca, Drucker-Prager and Mohr-Coulomb yield rules. Using these rules, you can describe the elasto-plastic material behavior. The yield function depends on the principal stresses or the invariants of a stress tensor. The criteria apply to 2D and 3D material models.
Keywords
Dlubal Knowledge Base Yield stress Nonlinear Yield law Material model Dlubal KB Knowledge Base Technical Contribution
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![[DE] KB 001651 | Plastic Analysis with RFEM](http://img.youtube.com/vi/a_YLHwSSWQE/mqdefault.jpg)
New
Yield Laws in Isotropic Nonlinear Elastic Material Model
In the "Material Model - Isotropic Nonlinear Elastic" window, you can select the yield laws according to von Mises, Tresca, Drucker-Prager and Mohr-Coulomb yield rules. Using these rules, you can describe the elasto-plastic material behavior.
![Window '1.1 General Data' for Serviceability Limit State with Settings for Nonlinear Calculation According to [2]](/-/media/Images/website/img/000001-010000/009301-009400/009376.png?la=en&mlid=149164433F8D4E0D89705EF3B002E4A8&hash=3AB14C4B44380D5CD55A73A5E3D45D8D86BFB424)
New
Increased Calculation Performance by Reducing the Nodal Degrees of Freedom
The number of degrees of freedom in a node is no longer a global calculation parameter in RFEM (6 degrees of freedom for each mesh node in 3D models, 7 degrees of freedom for the warping torsion analysis). Thus, each node is generally considered with a different number of degrees of freedom, which leads to a variable number of equations in the calculation.
This modification speeds up the calculation, especially for models where a significant reduction of the system could be achieved (e.g. trusses and membrane structures).
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