Research on visco-elastic-plastic creep model of artificially frozen soil under high confining pressures

A non-linear constitutive model for describing the mechanical behaviour of frozen ground and permafrost

“…The isotropic tensile stress, f ttt , depends as well on temperature and can be determined based on experimental tests. In general, for the same ice content of any frozen soil matrix, the higher the negative temperature field is, the higher the isotropic tensile stress is because of the increasing cohesive strength between the ice and the soil particles Lai et al, 2009Lai et al, , 2010Yang et al, 2010;Li et al, 2010).…”

“…Currently, besides a series of formulations that have been proposed for describing the mechanical behaviour of frozen ground and permafrost subjected to uniaxial loads (Zhu and Carbee, 1987;Zhu et al, 1992), long-term loads (Goughnour and Andersland, 1968;Ladanyi, 1972;Sayles, 1973;Fish, 1983Fish, , 1984Zhu and Carbee, 1983;Gardner et al, 1984;Cai et al, 1990;Domaschuk et al, 1991;Wijeweera and Joshi, 1991;Miao et al, 1995;He et al, 2000;Yang et al, 2004;Wang et al, 2006Wang et al, , 2014, and evolutionary thermal fields (Arenson and Springman, 2005b;Li et al, 2009;Yang et al, 2010) with the consideration of a number of associated problems (Nishimura et al, 2009;Thomas et al, 2010;Zhang and Michalowski, 2015;Zhang et al, 2016), models for capturing the effects of confining loads have been presented Lai et al, 2009Lai et al, , 2010Lai et al, , 2013Lai et al, , 2016Yang et al, 2010;Li et al, 2010;. However, when attempting to capture the highly nonlinear mechanical behaviour of frozen ground and permafrost under variations of confining pressure, there is the main issue of needing to use complex mathematical formulations that rely on many material parameters.…”

Experimental and numerical investigations on frost damage mechanism of a canal in cold regions

“…where [D T ] is the matrix of elastic constant related to temperature, (Andersland and Landanyi, 2004;Li et al, 2011;Yang et al, 2010;Zhao and Zhou, 2013), the Bingham model could describe the creep behavior of frozen soil. In one-dimension stress state, the viscoplastic strain rate can be expressed as (Owen and Hinton, 1980):…”

Multiaxial creep of frozen loess

“…Miao et al (1995) proposed a micro-structural damage rheological model for uniaxial creeping response of frozen clay. Li et al (2011) presented a viscous-elastic-plastic model to describe the creep process of frozen soils by using the Mises yield criterion and associated flow rule. Yang et al (2010) established a statistical damage creep constitutive model for warm ice-rich frozen soil based on the premise that the damage evolution of internal microstructure，such as crack and hole， obeys Weibull distribution.…”