Crack propagation in gusset plate subjected to dynamic stress time history

Hello everyone,

I want to analyse the inspection interval for the crack propagation in a gusset plate of a truss joint subjected to dynamic loading. I have the dynamic stress time history acting on the plate. Since I am new to abaqus I dont have much idea how to model the crack in the plate.Please kindly help me with this.

Thanks and regards,

Mahendra.