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The purpose of this test is to determine the dynamic shear modulus and damping ratio or dynamic elastic modulus and damping ratio of the sample at small strain under cyclic load.
This test adopts the steady-state forced vibration method and free vibration method. The excitation mode is rotational vibration and longitudinal vibration.
For this test, it is advisable to prepare more than 3 samples with the same properties and conduct the test under different ambient pressures. The ambient pressure should be determined according to the actual project. Generally, 100, 200, 300, and 400 KPa are used.
Applicable to saturated sand, silt and clay.
Force | 0~50Nm; precision 0.01Nm, set constant dynamic |
Pore pressure | 0~1MPa |
Confining pressure | 0~1MPa, set arbitrarily |
Vibration frequency | 0~10Hz |
Amplitude | 0.08~1.2mm |
Computer real-time acquisition, display, recording, image drawing, data export | |
Sample size | φ50×100mm |