Axial stress versus axial strain curves for two test results of a porous rock from triaxial undrained compression tests are shown in the figure. The pore water pressure for the cur... Axial stress versus axial strain curves for two test results of a porous rock from triaxial undrained compression tests are shown in the figure. The pore water pressure for the curve B can be best explained by
Understand the Problem
The question is asking to identify the conditions that best explain the pore water pressure for curve B in relation to the axial stress versus axial strain curves of a porous rock from the provided figure.
Answer
U < 0
The pore water pressure for Curve B can best be explained by U < 0.
Answer for screen readers
The pore water pressure for Curve B can best be explained by U < 0.
More Information
In undrained compression tests, a decrease in pore water pressure (U < 0) could result in a reduction in axial stress, which aligns with the characteristics of Curve B.
Tips
A common mistake is failing to consider the relationship between pore water pressure changes and stress response in undrained tests.
Sources
- Undrained Test - an overview | ScienceDirect Topics - sciencedirect.com
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