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  1. Yusei

    What does a negative Poisson's ratio of soil and rock mean?

    I calculated Poisson's ratio using the formula: Here are my calculations in one of the boreholes:
  2. Yusei

    What does a negative Poisson's ratio of soil and rock mean?

    Hi We conducted downhole seismic tests and we're able to get p- and s-wave velocities. When we calculated the Poisson's ratio at each depth, there were negative values at various depths. Most materials at these depths are soil and there are some depths where the material is rock. What could...

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