Plasticity (stress(strain)) interpolation in Abaqus

[skrat]

The stress-strain data for a plastic deformation is given in table. 

 I have two questions related to how that table is treated:
- How is data interpolated? Is it piecewise linear or something else?
- What if the plastic strain is larger than the maximum plastic strain provided in the table? I presume the data is extrapolated? But how? Using the linear interpolation between the last two points or something smarter?

Thank you

 

[FEA way]

In short, the interpolation is linear and outside of the specified range the values are held constant. These rules apply to most of the material definitions in Abaqus. For details check the documentation chapter "Material data definition".