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Journal of Zhejiang University SCIENCE A 1998 Vol.-1 No.-1 P.

http://doi.org/10.1631/jzus.A2300373


A novel shear damage model of the shear deformation and failure process of gas hydrate-bearing sediments


Author(s):  Hui WANG, Bo ZHOU

Affiliation(s):  College of Pipeline and Civil Engineering, China University of Petroleum (East China), Qingdao, China; more

Corresponding email(s):   zhoubo@upc.edu.cn

Key Words:  Gas hydrate-bearing sediments (GHBS), Shear damage model, Homogenization theory, Modified Mohr-Coulomb criterion, Damage evolution


Hui WANG, Bo ZHOU. A novel shear damage model of the shear deformation and failure process of gas hydrate-bearing sediments[J]. Journal of Zhejiang University Science A, 1998, -1(-1): .

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Abstract: 
A novel shear damage model based on homogenization theory and a modified Mohr-Coulomb criterion is proposed to predict the full deformation process of gas hydrate-bearing sediments (GHBS) during shearing by analyzing micro-mechanisms of shear deformation and failure characteristics. Then, the physical significance of the model’s parameters is explored. Finally, the damage evolution and shear stress partition inside GHBS during the shearing process are analyzed in detail. The results show that model parameters have clear physical meaning, and the shear damage model is capable of reflecting the nonlinear deformation and strain softening characteristics of GHBS due to its ability to better describe the damage evolution and shear stress partition mechanisms inside GHBS during the shearing process. Comparisons of experimental and theoretical results show that the global performance of the novel shear damage model is satisfactory. The model is expected to be widely adopted to analyze submarine landslide instability due to hydrate dissociation.

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