Undrained creep behavior of CO2 hydrate-bearing sand and its constitutive modeling considering the cementing effect of hydrates

A State-Dependent Elasto-Plastic Model for Hydrate-Bearing Cemented Sand Considering Damage and Cementation Effects

“…In order to improve the model’s ability to represent the stress-strain relationship of naturally occurring soft clay soil, Wang et al [ 30 ] introduced the concept of soil damage to modify the Duncan-Chang model. The second type is a damage constitutive model for hydrate-bearing cemented soils based on geotechnical damage theory [ 31 , 32 , 33 , 34 ]. The use of effective hydrate saturation was proposed to characterize the effect of hydrate storage mode [ 35 , 36 ].…”

Mechanical properties of amorphous CO2 hydrates: insights from molecular simulations

“…26 Followed by those important achievements on CO 2 hydrates, significant progress has been made in understanding CO 2 hydrate-bearing sediments. 27,28 Comparative analysis revealed that CO 2 hydrate in sediments show much stronger stability than those above sediments, indicated by their distinctive dissociation behavior. 10 Intriguingly, the formation of amorphous CO 2 hydrates can act as a significant barrier to the mass transfer of CH 4 and CO 2 molecules in the replacement process of methane hydrate with carbon dioxide.…”

A hypoplastic model for hydrate‐bearing sand considering hydrate saturation and grain breakage

“…Some constitutive models, including elastoplasticity [36][37][38][39] and hypoplasticity, 5,16,17 have been developed to study the effect of hydrate saturation on mechanical responses of different soil, such as MH-bearing sand, 35,[40][41][42][43] MH-bearing silt 34 and CO 2 hydrate-bearing sand. 13,44 These models are capable of predicting mechanical behavior and deformation characteristics of hydrate-bearing sands in the complex environments with different hydrate saturation and confining pressures. For instance, the MH critical state model 5 was proposed to account for the effect of volumetric yielding on mechanical strength and deformation stiffness.…”

“…To better understand the mechanical response of hydrate‐bearing sands at high confining pressure, some theoretical analysis 34,35 has been developed to satisfy the requirement of rapid development of methane gas hydrate exploitation. Some constitutive models, including elastoplasticity 36–39 and hypoplasticity, 5,16,17 have been developed to study the effect of hydrate saturation on mechanical responses of different soil, such as MH‐bearing sand, 35,40–43 MH‐bearing silt 34 and CO 2 hydrate‐bearing sand 13,44 . These models are capable of predicting mechanical behavior and deformation characteristics of hydrate‐bearing sands in the complex environments with different hydrate saturation and confining pressures.…”