Effect of shearing history on stress wave velocities of sands observed in triaxial compression tests

For the accurate design of geotechnical structures subjected to static and dynamic loadings, precise estimation elastic wave velocities hence, small strain stiffness soil is essential. However, interpretation propagating in deformed/sheared has not been comprehensively explored. In this research, shear (Vs) compression velocity (Vp) measurements have undertaken on three kinds uniformly graded sands during drained triaxial by keeping minor principal stress constant. Planar piezoelectric transducers used overcome limitations associated with more commonly bender elements, such as distortion specimen shearing. This technical note reveals that increase major propagation direction a significant influence Vp comparison Vs. The axial (εa) at which peak Vs noted comparable εa dilation or phase transformation takes place. values show substantial drop after transformation, although there an mean level. increases even place, it dictates its evolution compression. Moreover, for given material initial level, specimens prepared different densities approach one another shearing later merge large εa.