hello sir, when testing a single element for validation how much displacement has to be applied. suppose I am taking a element of 0.5 mm x0.5 mm x 0.5 mm how much displacement has to be applied.
It depends what level of strains you want to test. Check the examples in the Verification guide of Abaqus documentation. There you will find ready single element tests for different materials, including subroutines.
A it also depends on the material model. If linear elastic then displacement probably doesn’t matter. If nonlinear material, then applied strain should be consistent with the material model level that you want to check.