A state-dependent hypoplastic model for methane hydrate-bearing sands

• Main Authors: Liu, Jun, wang, shun, Jiang, Mingjing, Wu, Wei
• Format: Other/Unknown Material
• Language: unknown
• Published: Center for Open Science 2021
• Subjects: Methane hydrate
• Online Access: http://dx.doi.org/10.31224/osf.io/jp2at

The mechanical behaviors of methane hydrate-bearing sands (MHBS) are largely affected by the presence of methane hydrate, temperature, and pore pressure. In this study, we present a simple hypoplastic model for MHBS. Methane hydrate saturation is included as a state parameter affecting the mechanical behaviors of MHBS. A new phase parameter is introduced to account for the coupled effects of temperature and pore pressure on the mechanical behaviors of MHBS. The phase parameter can be determined by a simple function of temperature and pore pressure. Comparison of the predictions with experiments shows that the model is able to capture the salient behaviors of MHBS.