Triaxial shear test - Post-liquefaction testing. The fine sand specimen was liquefied during CU cycles and recovered with CD cycles many times. The wrinkles formed due to extreme volume change imposed by iterating between CU liquefaction and draining. In liquefied state sample become soft enough to imprint thin latex. During CD cycles - stiff enough to preserve the imprinted pattern. No bulging or shear rupture is present despite numerous instances of pure plastic yielding.
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