Modified Stiffnesses for Simulating Failing Members

Tips & Tricks

If you want to simulate, for example, the failure of particular structural members, you can use the ‘Modify Stiffness’ function.

The model in the picture represents a turbine rotor. In addition to the normal state for a predefined number of revolutions, we want to check the failure of a blade for the same number of revolutions. As load, we used a load generated ‘From Movement’. For the failure of the blade, we created a further load case by deactivating the according surfaces by means of ‘Modify Stiffness’.

The results graphic on the lower left in the picture shows the result of the calculation with the support forces from the rotating unbalance.


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RFEM 5.xx

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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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