 | | Mechanics of Solids
A Journal of Russian Academy of Sciences | | Founded
in January 1966
Issued 6 times a year
Print ISSN 0025-6544
Online ISSN 1934-7936 |
Archive of Issues
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| In English (Mech. Solids): | | 4810 |
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| Yuqi Chen, Bo Zhou, Chao Zhang, and Fei Zhao, "A Statistical Damage Constitutive Model of Hydrate-Bearing Sediments Based on DEM Tests with Flexible Membrane Boundaries," Mech. Solids. 58 (5), 1667-1689 (2023) |
| Year |
2023 |
Volume |
58 |
Number |
5 |
Pages |
1667-1689 |
| DOI |
10.3103/S0025654423600605 |
| Title |
A Statistical Damage Constitutive Model of Hydrate-Bearing Sediments Based on DEM Tests with Flexible Membrane Boundaries |
| Author(s) |
Yuqi Chen (College of Pipeline and Civil Engineering, China University of Petroleum (East China), Qingdao, 266580 China)
Bo Zhou (College of Pipeline and Civil Engineering, China University of Petroleum (East China), Qingdao, 266580 China, zhoubo@upc.edu.cn)
Chao Zhang (College of Pipeline and Civil Engineering, China University of Petroleum (East China), Qingdao, 266580 China)
Fei Zhao (College of Pipeline and Civil Engineering, China University of Petroleum (East China), Qingdao, 266580 China) |
| Abstract |
In this paper, many numerical simulation tests of biaxial compression by the discrete element method (DEM) are carried out on the hydrate-bearing sediments. It should be noted that the flexible particle membrane boundaries are used in the DEM simulation tests instead of the rigid wall, which is more reasonable to reproduce the real failure mode of hydrate-bearing sediments. The mechanical properties and failure process of hydrate-bearing sediments during loading are analyzed from the macro and micro perspectives. According to the simulation test results, the formula for calculating the initial elastic modulus of hydrate-bearing sediments is established, through which the initial elastic modulus under specific conditions is determined. In addition, a statistical damage constitutive model, which is based on Weibull distribution and Drucker-Prager strength criterion, is developed to predict the micro mechanical behaviors of hydrate-bearing sediments. The parameters in the constitutive model are determined by the extreme value method. The results predicted by the constitutive model are in good agreement with the test results, which prove that the constitutive model is reasonable. |
| Keywords |
hydrate-bearing sediments, discrete element method, flexible particle membrane boundaries, initial elastic modulus, statistical damage constitutive model |
| Received |
11 April 2023 | Revised |
06 July 2023 | Accepted |
08 July 2023 |
| Link to Fulltext |
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