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A Spectral Microplane Model for the Anisotropic Damage Behavior of Shales
Li MY(李明耀)1,2; Chen X1; Zhou D(周东)2; Su YW(苏业旺)2,3,4
Source PublicationJOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME
2020-08-01
Volume87Issue:8Pages:11
ISSN0021-8936
Abstract

The development of constitutive models for shales has been a challenge for decades due to the difficulty of characterizing the strongly anisotropic macroscopic behavior related to the inherent mesostructure and damage mechanisms. In this paper, a spectral microplane damage model is developed for the anisotropic damage behavior of shales. The modeling challenge of the anisotropic elasticity in the microplane model is theoretically overcome by the spectral decomposition theory without limitation on the degree of the anisotropy compared with other microplane models. The stiffness tensor of anisotropic shales is effectively decomposed into four different eigenmodes with the activation of certain groups of microplanes corresponding to the specific orientation of the applied stresses. The inherent and the induced anisotropic behavior is thus characterized by proposing suitable microplane relations on certain eigenmodes directly reflecting the initial mesostructure and the failure mechanisms. For the challenge of the postpeak softening behavior, two-scalar damage variables are introduced to characterize the tensile and the shear damage related to the opening and the closure of microcracks under different stress conditions. Comparison between numerical simulation and experimental data shows that the proposed model provides satisfactory predictions for both weakly and highly anisotropic shales including prepeak nonlinear behavior, failure strengths, and postpeak softening under different confining pressures and different bedding plane orientations.

Keywordconstitutive models anisotropy damage spectral decomposition shales constitutive modeling of materials failure criteria mechanical properties of materials plasticity
DOI10.1115/1.4047005
Indexed BySCI ; EI
Language英语
WOS IDWOS:000554443100001
WOS KeywordFAILURE ; CRITERION ; CONCRETE ; STRAIN ; CLAY
WOS Research AreaMechanics
WOS SubjectMechanics
Funding ProjectNational Natural Science Foundation of China[11772331] ; National Natural Science Foundation of China[11572323] ; National Natural Science Foundation of China[11802332] ; National Natural Science Foundation of China[11572344] ; Beijing Municipal Natural Science Foundation[2202066] ; Key Research Program of Frontier Sciences of the Chinese Academy of Sciences[ZDBS-LY-JSC014] ; Chinese Academy of Sciences via the Hundred Talent Program ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB22040501] ; State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology[GZ19102]
Funding OrganizationNational Natural Science Foundation of China ; Beijing Municipal Natural Science Foundation ; Key Research Program of Frontier Sciences of the Chinese Academy of Sciences ; Chinese Academy of Sciences via the Hundred Talent Program ; Strategic Priority Research Program of the Chinese Academy of Sciences ; State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology
Classification一类/力学重要期刊
Ranking1
ContributorZhou D(周东) ; Su YW(苏业旺)
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/84831
Collection非线性力学国家重点实验室
Affiliation1.China Univ Min & Technol, Sch Mech & Civil Engn, Beijing 100083, Peoples R China;
2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China;
3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China;
4.Dalian Univ Technol, Dept Engn Mech, State Key Lab Struct Anal Ind Equipment, Dalian 116024, Peoples R China
Recommended Citation
GB/T 7714
Li MY,Chen X,Zhou D,et al. A Spectral Microplane Model for the Anisotropic Damage Behavior of Shales[J]. JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME,2020,87(8):11.
APA Li MY,Chen X,Zhou D,&Su YW.(2020).A Spectral Microplane Model for the Anisotropic Damage Behavior of Shales.JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME,87(8),11.
MLA Li MY,et al."A Spectral Microplane Model for the Anisotropic Damage Behavior of Shales".JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME 87.8(2020):11.
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