I must have missed to respond to your question in a timely manner, sorry.
Since the stress and strain fields are not homogeneous in bending, there is no pre-defined loading mode for bending.
To calibrate to bending data you need to use an inverse calibration (External Solver). Make sure you have a recent version of the MCalibration, and then check out the following demo example:
Jorgen Bergstrom, Ph.D.