It is not possible to enter a nonlinear stress-strain curve. The diagram initially appears error-free, but then the error message comes with the note that only positive values have to be entered in ascending order. How can I avoid this message?


When using a diagram in the program, the first strain is always given. (Initial strain). It depends on the output modulus of elasticity and cannot be controlled directly. There is a trick in the program to nevertheless adjust the first strain to the desired value.  To do this, you have to calculate the initial modulus of elasticity and enter it in the material parameter. In this case, the following procedure would be used.


Diagram Nonlinear material

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RF-MAT NL 5.xx

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Consideration of nonlinear material laws

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