Johnson Cook
If failure dependent tests have been performed (tension, shear, compression tests) and the information is available, to include failure criteria in the curves fit.
- Select Johnson Cook (RADIOSS) from the Select Failure list.
-
The chart changes to rupture strain vs triaxiality and plots the
Johnson&Cook curve. Three red points define compression, shear and
tension.
Using the values and sliders the points can be moved.
-
Define the failure criteria in the Select Outcome list
and create the material card. If created, strain rates are taken into an
account.
Figure 1. Failure - Johnson Cook Curve 
Table 1. Failure Equations Johnson&Cook