Disturbed State constitutive modeling of two Pleistocene tills

Subglacial till behaviour derived from in situ wireless multi-sensor subglacial probes: Rheology, hydro-mechanical interactions and till formation

“…Recent experiments using the Disturbed State Concept (Desai, 1974(Desai, , 2001Sane et al, 2008) and the critical state response model (Roscoe et al, 1958;Altuhafi et al, 2009) have attempted to model these two elements. Sane et al (2008) argue that as a material deforms, disturbed zones develop which are distributed throughout the material. As deformation continues, so these elements coalesce.…”

Probabilistic Analysis of a Rock Salt Cavern with Application to Energy Storage Systems

“…The uncertain material properties are customarily defined as random variables described by the expected value and standard deviation and a probability density function as well. These measures are driven by the existing data set about the mechanical properties of rock salt formation (Ratigan & Hannum, 1980;Hansen & Carter, 1983;Van Sambeek et al, 1993;Sane et al, 2008;Guo et al, 2012;Ma et al, 2013).…”

“…α is the hardening parameter which determines the size of the yield surface. This parameter is a function of the accumulated viscoplastic strain ξ, and its value decreases by increasing the viscoplastic deformation (Sane et al, 2008). The value of ξ is represented in Eq.…”

“…The uncertainties of these parameters are modelled by normal probability density functions distribution. The minimum and maximum values of the uncertain parameters are chosen based on previous experiences (Hansen et al, 1984;Desai & Zhang, 1987;Sane et al, 2008;Guo et al, 2012) and engineering judgement. The values corresponding to the Maxwell dashpot coefficient are chosen based on Heusermann et al (2003) and Hou (2003).…”

Macroscopic and mesoscopic parameters introduction into stress-strain relationship description of clayey soils

“…DSC can account for different material behaviors including hardening as well as softening characteristics within a single framework. DSC applications usually focus on utilization of hierarchical single surface (HISS) model [5][6] and algorithms methods [7] are established to reduce the efforts for calibration of HISS model parameters. The computation and parameter determination for HISS model [8][9] is described in detail for generalization of HISS model as a reference model for DSC.…”