When entering a new material using the Diagram definition type, the first row is locked. How can I define the material?

Answer

For the first point, the modulus of elasticity of the material is assumed in the material model, so that there is quasi an initial state for the solver to ensure the numerical stability.

If there is no material selected, the first point is not calculated as expected when creating the material model using the Diagram definition type, and cannot be adjusted reasonably.

Figure 02 - Creating Material Model - Wrong Process

To avoid this, you have to select the material in advance. Then, you can create the material model as usual, and also adjust the points. The first point can now be adjusted with regard to the stress.

Figure 03 - Creating Material Model - Correct Process

Keywords

Material model Material Diagram

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  • Updated 10 November 2020

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