Discussion Regarding MAT_ADD_EROSION

[Shubham Sharma]

Hello everyone,

I am currently running simulations of blast loading on RCC panels, and when I plot the effective plastic strain variation, the erosion criteria make a significant difference.

From the literature, what I have gathered is that there is no physical meaning of this criteria and it should be treated as a broom which cleans the damaged elements, but in my case this cleaning affects the validating parameters such as spall radius and spall depth, how do I deal with this situation, and what should be the work flow (including the checks) to define this erosion parameter?

I can validate the central deflection by measuring the reinforcement deflection at the centre, but how do I verify the central spall radius and depth when they are heavily dependent on the erosion criteria, which in turn is arbitrary?

Thankyou.

[l...@schwer.net]

I like the analogy of any erosion criteria as “a broom to sweep away damaged elements.”

 

Rather than focusing on Lagrange elements and the necessity of erosion, consider instead using an MM-ALE (Eulerian) approach or SPH. These both have their limits, but typically erosion is not among the limitations.                 --len

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