Are different stiffnesses possible for the x and y directions of a surface in RFEM?


Yes, they are possible. For this reason, orthotropic properties can be defined either for the material or for the surface.

Orthotropic material (Figure 1):

Enter the elastic moduli of the material for the two surface directions (if the additional module RF-MAT NL is not licensed, only the material models 'Isotropic Linear Elastic' and 'Orthotropic Elastic 2D/3D' can be used). Then, assign the material to the surface.

Orthotropic surface (Figure 2):

Define the stiffness type of the surface as 'Orthotropic.' Then, you can define the coefficients of the local stiffness matrix according to different criteria.

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RFEM Main Program
RFEM 5.xx

Main Program

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

Price of First License
3,540.00 USD