TY - JOUR
T1 - A Geomechanical Model for Gas Hydrate Bearing Sediments Incorporating High Dilatancy, Temperature, and Rate Effects
AU - Zhou, Bohan
AU - Sanchez, Marcelo
AU - Oldecop, Luciano
AU - Santamarina, Carlos
N1 - KAUST Repository Item: Exported on 2022-06-13
Acknowledgements: We acknowledge the financial support from NETL (National Energy Technology Laboratory, DOE, USA, through Award No.: DE-FE0013889.
The authors thank Xuerui Gai for technical assistance and useful discussion.
PY - 2022/6/10
Y1 - 2022/6/10
N2 - The geomechanical behavior of methane hydrate bearing sediments (MHBS) is influenced by many factors, including temperature, fluid pressure, hydrate saturation, stress level, and strain rate. The paper presents a visco-elastoplastic constitutive model for MHBS based on an elastoplastic model that incorporates the effect of hydrate saturation, stress history, and hydrate morphology on hydrate sediment response. The upgraded model is able to account for additional critical features of MHBS behavior, such as, high-dilatancy, temperature, and rate effects. The main components and the mathematical formulation of the new constitutive model are described in detail. The upgraded model is validated using published triaxial tests involving MHBS. The model agrees overly well with the experimental observations and is able to capture the main features associated with the behavior of MHBS.
AB - The geomechanical behavior of methane hydrate bearing sediments (MHBS) is influenced by many factors, including temperature, fluid pressure, hydrate saturation, stress level, and strain rate. The paper presents a visco-elastoplastic constitutive model for MHBS based on an elastoplastic model that incorporates the effect of hydrate saturation, stress history, and hydrate morphology on hydrate sediment response. The upgraded model is able to account for additional critical features of MHBS behavior, such as, high-dilatancy, temperature, and rate effects. The main components and the mathematical formulation of the new constitutive model are described in detail. The upgraded model is validated using published triaxial tests involving MHBS. The model agrees overly well with the experimental observations and is able to capture the main features associated with the behavior of MHBS.
UR - http://hdl.handle.net/10754/678894
UR - https://www.mdpi.com/1996-1073/15/12/4280
U2 - 10.3390/en15124280
DO - 10.3390/en15124280
M3 - Article
SN - 1996-1073
VL - 15
SP - 4280
JO - Energies
JF - Energies
IS - 12
ER -