I am going through literature on Impact mechanics. I could see in some of the literature the Johnson-Cook (J-C) Model plastic & Damage model were used. However, at some places,  Hillerborg's Fracture Energy Criterion has been invoked in conjunction with the J-C Model plastic & damage model.

  • Could someone please help me understand how we could decide when to invoke Hillerborg fracture energy criterion while simulating impact problems?
  • How Hillerborg's Fracture Energy Criterion could be invoked in conjunction with the J-C Model plastic & damage model in ABAQUS.

I need your valuable assistance will help me in getting my work done.

References:

Simulation with J-C Model plastic & damage model alone

"3D numerical simulations of ductile targets subjected to oblique impact by sharp-nosed projectile"

Simulation with J-C Model plastic & damage model and Hillerborg's Fracture Energy Criterion

"Experimental and numerical studies of the double-nosed projectile impact on aluminum plates"

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