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2018-12-03
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Quadrangle Surface

A quadrangle surface describes the geometry of a general trilateral or quadrilateral surface. Boundary lines can be straight lines, but also arcs, polylines, or splines. Since the lines do not necessarily have to rest in one plane, you can use this surface type to model curved surfaces, such as shells or membranes.

Complex geometries can be represented by a suitable subdivision into surfaces with four or three lines. RFEM generates the corresponding quadrangle surfaces from the geometrical conditions of the boundary lines.

When generating an FE mesh, curved surfaces are utilized by planar elements. The inclination angle of the finite elements from the plane can be set in the FE mesh settings in the FE Mesh dialog box.


Links
References
  1. Dlubal Software. (2018). Manual RFEM. Tiefenbach.