Friction and Dilatancy Angles of Granular Soils Incorporating Effects of Shearing Modes

How meso shear chains bridge multiscale shear behaviors in granular materials: A preliminary study

“…For samples with multiple shear bands, this method can be used for different segments of selected zones, which is shown in Figure 10. In Figure 9, the sample DF in Appendix A with a different aspect ratio L/W = 1.5 was selected to give an example of shear band orientation detection on the left side 8 . The evolutions 7 s (s > 0) relates to the domain and density of data, and in this paper the value of s is not so important.…”

“…The evolutions 7 s (s > 0) relates to the domain and density of data, and in this paper the value of s is not so important. 8 It should be noted that the macro strain increment does not influence the evolution of shear chain and shear band orientations of the average direction of shear chains < |θ| > (blue points) and the shear band θ sb (red points) are compared along the shearing process in the right side. Since the final shear band seems to connect the diagonal corners of the sample, the diagonal angle θ ar evolution is also shown in Figure 9.…”

“…Under shearing loads, complex mechanical features are found in granular materials due to the disordered discrete structures and various components. The critical state [3,4,5], dilatancy [6,7,8], failure patterns [9,10,11] and many other phenomena are triggered by shearing but not well described in constitutive models, while multiscale investigations provide new clues for describing this constitutive complexity [12]. Shear banding, which relates to the macroscopic strain localization of a narrow band, is one of the typical failure patterns under shearing for granular materials.…”