Interpolating material data as a function of independent variables requires table lookups of the material data values during analysis. The table lookups occur frequently in ABAQUS/Explicit and are most economical if the interpolation is from regular data.
If necessary, ABAQUS/Explicit uses an error tolerance to regularize the input data. The number of intervals in the range of each independent variable is chosen such that the error between the piecewise linear regularized data and each of your defined points is less than the tolerance times the range of the dependent variable.
For more information, see “Regularizing user-defined data in ABAQUS/Explicit” in “Material data definition,” Section 16.1.2 of the ABAQUS Analysis User's Manual.
To regularize user-defined material data:
From the menu bar in the Edit Material dialog box, select General
Regularization.
(For information on displaying the Edit Material dialog box, see “Creating or editing a material,” Section 12.6.1.)
In the Rtol field, enter the tolerance that you want ABAQUS to use for regularizing the material data. The default is 0.03.
Specify how you want to regularize strain-rate-dependent data:
Select Logarithmic for regularize strain rate data using logarithmic intervals rather than uniformly spaced intervals. This option generally provides a better match to typical strain-rate-dependent curves.
Select Linear to use uniform intervals for regularization of strain rate data.
Click OK to close the Edit Material dialog box. Alternatively, you can select another material behavior to define from the menus in the Edit Material dialog box (see “Browsing and modifying material behaviors,” Section 12.6.2, for more information).