Abaqus problem with Small Punch Test
 

Hi guys,

I´m recreating a Small Punch Test as follows:


https://ibb.co/bW72DMF


I´m then adding an UMAT subroutine and comparing to lab test results in order to evaluate the size effect (strain gradient plasticity) of different specimens through force-displacement plots. The abaqus model has been a complete succes when setting speciments of thickness 0.5 mm, 0.4 mm and 0.3 mm but when trying to fit specimens any lower than that it will crash. For 0.2 mm the software will do some increments and then exit with error, for 0.1 mm or lower it won´t even start calculations.

Do you guys have any suggestions on how to fix this?