1.

In an undrained tri-axial test on a saturated clay, the Poisson’s ratio is

A. \(\frac{{{\sigma _3}}}{{{\sigma _1} + {\sigma _3}\;}}\)
B. \(\frac{{{\sigma _3}}}{{{\sigma _1} - {\sigma _3}\;}}\)
C. \(\frac{{{\sigma _1} - {\sigma _3}}}{{{\sigma _3}\;}}\)
D. \(\frac{{{\sigma _1} + {\sigma _3}}}{{{\sigma _3}\;}}\)
Answer» B. \(\frac{{{\sigma _3}}}{{{\sigma _1} - {\sigma _3}\;}}\)


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