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[Bruno Chareyre <question688979@xxxxxxxxxxxxxxxxxxxxx>]

Question #688979 on Yade changed:
https://answers.launchpad.net/yade/+question/688979

Bruno Chareyre proposed the following answer:
> Under the action of cyclic shear load, the effective stress gradually
decreases as the number of cycles increases.

That statement is generally wrong in both experiments and simulations.
Let you do cycles on a random sand and in the vast majority of the cases
what you describe will not happen. The question starts on the wrong foot
IMO.

> they are using Yade) considering water pressure somehow

I was afraid someone would mention that at some point. :)
Not that these papers are bad, but the discussion is already too confused.
What Martin et al. (and many others for ages) did is that they simulated dry materials, nothing else. They did not consider pore pressure "somehow", they simply postulated that mechanical response in dry conditions (simulated) could be extrapolated to saturated conditions (not simulated).

B

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