On 09/03/2018 11:34 AM, Luc Scholtes wrote:
This is a bit tricky but we have to keep in mind that stress induced
cracks are not "connected" one with another up until a fair amount of
them is present inside the medium (crack coalescence can be observed
sometimes only after 70% of the peak stress has been reached while
isolated cracks can appear at less than 20% of the stress peak).
Interestingly there is a question of scale here. If one crack is made of
multiple cracked edges, then what you describe will already occur, by
coalescence of multiple multi-edge cracks.
I understand you would like this to occur even for single-edge cracks,
to make the same scenario possible with much less solid particles.
If so it seems enough to change the definition of when an edge is
"cracked", i.e. it is cracked only when the contact opening is
sufficiently large (not just when the cohesive bond is broken).
To me it would make more sense than bean counting.
Bruno
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