RF-MAT NL Add-on Module for RFEM
Consideration of Nonlinear Material Laws
The RF-MAT NL add‑on module allows for consideration of nonlinear material behavior in RFEM.
The following material models are available in RF − MAT NL:Isotropic Plastic 1D/2D/3D and Isotropic Nonlinear Elastic 1D/2D/3D
You can select three different definition types here:
- Basic (definition of the equivalent stress under which the material plastifies)
- Bilinear (definition of the equivalent stress and strain hardening modulus)
- Definition of polygonal stress-strain diagram
- Option to save / import the diagram
- Interface with MS Excel
This material model allows the definition of material properties (modulus of elasticity, shear modulus, Poisson's ratio) and ultimate strengths (tension, compression, shear) in two or three axes.Isotropic Masonry 2D
It is possible to specify the limit tension stresses σx,limit and σy,limit as well as the hardening factor CH.Orthotropic Masonry 2D
The material model Orthotropic Masonry 2D is an elastoplastic model that additionally allows material softening, which can be different in the local x- and y-direction of a surface. The material model is suitable for (unreinforced) masonry walls with loads in the plane of the pane.Isotropic Damage 2D/3D
This material model enables definition of asymmetric stress‑strain diagrams. The elastic modulus is calculated by Ei = (σi-σi-1) / (εi-εi-1) in each step of the stress-strain diagram.
Do you have any questions about our products or need advice on selecting the products needed for your projects?
Contact us via our free e-mail, chat, or forum support or find various suggested solutions and useful tips on our FAQ page.
For plastic stresses of ductile materials such as steel, yielding effects occur where the increase in deformation comes along with hardening. They lead to permanent deformations and in extreme cases to the destruction of the structural component.
The material model Orthotropic Masonry 2D is an elastoplastic model that additionally allows softening of the material, which can be different in the local x- and y-direction of a surface. The material model is suitable for (unreinforced) masonry walls with in-plane loads.
- What is the best way to consider steel fiber concrete in the structural analysis software RFEM?
- Can I simulate the cracked state of a concrete cross-section for a bending beam with the "Isotropic Nonlinear Elastic 1D" material model?
- When defining my material, I get Warning No. 1136 and cannot continue working. How can I prevent this warning?
- I have edited the material in my model. When starting the calculation, I get an error message. What can be the reason for this?
- When entering a new material using the Diagram definition type, the first row is locked. How can I define the material?
- How is Young's modulus calculated for the "isotropic damage" material model?
- How is it possible to determine which plastic deformation remains in an RFEM model with a plastic material model after the relief?
- What is the difference between the materials Isotropic Plastic 1D and Isotropic Nonlinear Elastic 1D?
- It is not possible to enter a nonlinear stress-strain curve. The diagram is initially displayed correctly, but then an error message appears saying that the positive values have to be only entered in ascending order. How can I avoid this message?
- Is it possible to perform a seismic analysis with the masonry material model?
Customers who bought this product also bought
Structural engineering software for finite element analysis (FEA) of planar and spatial structural systems consisting of plates, walls, shells, members (beams), solids and contact elements
Stress analysis of steel surfaces and members
Design of steel members according to Eurocode 3
Design of reinforced concrete members and surfaces (plates, walls, planar structures, shells)
Stability analysis according to the eigenvalue method
Module Extension for RFEM
Extension of the modules for reinforced concrete design by the Eurocode 2 design
Dynamic analysis of natural frequencies and mode shapes of member, surface, and solid models
Generation of equivalent geometric imperfections and pre-deformed initial structures for nonlinear calculations
Reinforced concrete design according to the model column method (method based on nominal curvature)
Seismic and static load analysis using the multi-modal response spectrum analysis
Physical and geometrical nonlinear calculation of beam and plate structures consisting of reinforced concrete
Dynamic and seismic analysis including time history analysis and multi-modal response spectrum analysis