Stress–dilatancy behavior for sand under loading and unloading conditions

Abstract

Experimental results have shown very different stress-dilatancy behavior for sand under loading and unloading conditions. Experimental results have also shown significant effects of inherent anisotropy. In this article, a micromechanics-based method is presented, by which the stress-dilatancy relation is obtained through the consideration of slips at the interparticle contacts in all orientations. The method also accounts for the effect of inherent anisotropy in sand. Experimental results on Toyoura sand and Hostun sand are used for illustration of the proposed method.

Stress Dilatancy of Natural Soft Clay under an Undrained Creep Condition

“…Because of the discrepancy in fitting experimental tests, a material constant D is often introduced in dilatancy equations for sand, such as that proposed by Jefferies (1993), Gajo and Muir Wood (1999), Yin et al (2010a), and Yin and Chang (2012) …”

Constitutive model for granular materials considering grain breakage in finite deformations

“…Data show that usually ϕ = ψ and that relative density does not influence either of the two lines (Lade & Ibsen, 1997). The assumption taken in the soil constitutive model by considering the Roscoe dilatancy rule (Roscoe et al, 1958) is a macroscale view of the underlying micromechanical processes which are behind the dilative behaviour of soils (Yin & Chang, 2013). Figure 5 shows the graphical representation of the phase transformation and instability lines.…”

Seismic dynamics of offshore breakwater on liquefiable seabed foundation

“…In the past 30 years, significant progress has been made to advance the state-of-the-art modeling of liquefiable soils [17][18][19][20][21][22][23]. However, these advanced models have not yet been used to study the nonlinear interaction mechanism of offshore structures with seabed foundation.…”