I have two materials, aluminum and steel, that I am simulating impact on. Both have the exact same material models:
- J-C plasticity and damage
- EOS
- Specific heat and inelastic heat fraction
- Damage Evolution via fracture energy, set to zero for both materials
- Same velocity
- Same contact parameters (Hard contact, frictionless, general contact)
- Element deletion is on for both materials
I get a shear plug formation for aluminum (top image), which agrees with my experiments. But somehow for the steel material, the projectile penetrates through the target material (bottom image).
Even if the response isn't via shear plugging, why is the projectile mesh penetrating the target nodes? I would think the material immediately fractures to form a plug anyway if my fracture energy is set to zero.
Not sure, but something to do with Atomic Number, Density, Atomic Mass and velocity of penetration.
Could you check the shell thickness effect or mesh stacking? Sometimes it may occur due to discrepancies in contact definition.
Dharun Vadugappatty Srinivasan this is a 3D model so it's not a simulation parameter issue. If I put an extremely high fracture energy value, the projectile doesn't pass through the sample, and the plug fractures around the impact location as it should.
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