Contact Solids: 'Side surfaces do not have four boundary curves'

Tips & Tricks

In RFEM, you can display contact properties between two surfaces by means of contact solids. When modelling contact solids, you should keep in mind that each connecting side surface between the contact surfaces is to be modelled as a simple surface with four boundary lines.

The FE mesh cannot be generated if this modelling rule is not considered. In that case, the program displays the error message “Side surfaces [Surface No.] does not have four boundary curves”. As illustrated in Figure, the side connection line would be split in several partial surfaces, which consist of four boundary lines.


Contact solid Border line Boundary line Lateral surface Error no. 2333 Modeling rule FE mesh


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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

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