 the study examines the effect of particle shape on the mechanical behavior of 3D printed sand analogs. It was found that the shear wave velocity and shear modulus of the 3D printed sand specimens were related to mean effective stress, relative density, and void ratio. Additionally, the changes in shear wave velocity could be captured using regression analysis based on the individual particle shape parameters and combined particle shape parameters. These findings suggest that 3D printing technology can be used to generate artificial sand-sized particles with independent control over particle shape and size, enabling researchers to isolate the effects of individual particle properties on the mechanical behavior of coarse-grained soils. This article was authored by Alejandro Martinez and Sheikh Sharif Ahmed.