Unexpected penetration of striker (Charpy Test) in SPH Form 12 Specimen - LS-DYNA
I am performing the Charpy Impact test on a Nickel Based Superalloy Inconel 718. I used SPH Form 0 initially in LS-DYNA however, the specimen fractured based on tensile instability. So I decided to use Form 12 which is expected to take care of Tensile Instability.
Using Form 0, there is no penetration of the 5 m/s striker, however with the Form 12, the striker is going through the specimen.
Can you kindly indicate where I am going wrong. The picture shows the difference.