Failing Support Conditions for Contact Surfaces
In order to create a surface model with failing supports close to reality, an option called "Failure if contact perpendicular to surfaces failed" is available in RFEM 5 for contact solids under "Contact Parallel to Surfaces".
Thus, the "Wobbling" load case of the modeled chair can be represented close to reality.
Since the chair legs are represented as members, it is possible and reasonable to use a model with a nodal support. This nonlinearity ("Failure of all, if PZ' negative" in this case) is also available in RFEM 5 and RSTAB 8.
Dipl.-Ing. (FH) Frank Sonntag, M.Sc.
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