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I would like to define an orthotropic plate. In order to check the influence of the changed material properties on the stiffness matrix, I would like to know how the stiffness matrix is determine. Also, how is the dead load of an orthotropic surface calculated?

Answer

In RFEM, you can define various types of orthotropic surfaces. The information about the calculation of respective coefficients of the stiffness matrix is available in the 'Stiffness Matrix' tab by clicking the [Info] button (see Figure).

The self-weight determination is based on the specific weight of the material as well as the values defined in the windows of the selected orthotropy type. To consider the self-weight, there are separate text boxes available, where you can enter the equivalent plate thickness, for example.

Keywords

orthotropic surface orthotropy stiffness matrix stiffness element dead load orthotropy type

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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

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