I want to simulate a 2D specimen with a crack in the middle. The geometry is h=100 mm, w = 100 mm, t = 1 mm and the crack a=10 mm is in the middle of the specimen.

The material is a rubber and the Mooney-Rivlin law is used. C1= 0.1815 MPa

C2= 0.098 MPa

How can I obtain the G ic in the tip of the crack? (" ic "  means: i=mode 1 of failure; c=critical)

the .FIC command is used, but I don't know how to obtain the values

The file with the codeline is attached

beforehand, thanks 

FHA