Hashin strain based failure criteria impelementation using ABAQUS UMAT

Dear all

[LEFT][COLOR=#000000][FONT=latoregular]I am new to Abaqus(3 months experience). [/FONT][/COLOR][/LEFT]Presently I am working on implementation of Hashin strain failure criteria considering nonlocality. Before going for nonlocal criteria, I would like to understand classical strain failure implementation in abaqus.
Can anyone share material/umat/reference for strain based failure criteria implementation in ABAQUS

Thanks and Regards
K Shiva Reddy