PMID- 32756343
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20200928
IS  - 1996-1944 (Print)
IS  - 1996-1944 (Electronic)
IS  - 1996-1944 (Linking)
VI  - 13
IP  - 15
DP  - 2020 Aug 3
TI  - Experimental Investigation and Micromechanical Modeling of Elastoplastic Damage 
      Behavior of Sandstone.
LID - 10.3390/ma13153414 [doi]
LID - 3414
AB  - The mechanical behavior of the sandstone at the dam site is important to the 
      stability of the hydropower station to be built in Southwest China. A series of 
      triaxial compression tests under different confining pressures were conducted in 
      the laboratory. The critical stresses were determined and the relationship 
      between the critical stress and confining pressure were analyzed. The Young's 
      modulus increases non-linearly with the confining pressure while the plastic 
      strain increment Nvarphi and the dilation angle varphi showed a negative response. Scanning 
      electron microscope (SEM) tests showed that the failure of the sandstone under 
      compression is a coupled process of crack growth and frictional sliding. Based on 
      the experimental results, a coupled elastoplastic damage model was proposed 
      within the irreversible thermodynamic framework. The plastic deformation and 
      damage evolution were described by using the micromechanical homogenization 
      method. The plastic flow is inherently driven by the damage evolution. 
      Furthermore, a numerical integration algorithm was developed to simulate the 
      coupled elastoplastic damage behavior of sandstone. The main inelastic properties 
      of the sandstone were well captured. The model will be implemented into the 
      finite element method (FEM) to estimate the excavation damaged zones (EDZs) which 
      can provide a reference for the design and construction of such a huge hydropower 
      project.
FAU - Jia, Chaojun
AU  - Jia C
AUID- ORCID: 0000-0001-6835-6853
AD  - School of Civil Engineering, Central South University, Changsha 410075, China.
AD  - Key Laboratory of Ministry of Education for Geomechanics and Embankment 
      Engineering, Hohai University, Nanjing 210098, China.
FAU - Zhang, Qiang
AU  - Zhang Q
AUID- ORCID: 0000-0002-6173-7706
AD  - Research Institute of Geotechnical Engineering, China Institute of Water 
      Resources and Hydropower Research, Beijing 100048, China.
AD  - State key laboratory of hydraulics and mountain river engineering, Sichuan 
      University, Chengdu 610065, China.
FAU - Wang, Susheng
AU  - Wang S
AD  - Laboratory State Key Laboratory for Geomechanics and Deep Underground 
      Engineering, School of Mechanics and Civil Engineering, China University of 
      Mining and Technology, Xuzhou 221116, China.
AD  - Laboratory of Multiscale and Multiphysics Mechanics, University of Lille, CNRS 
      FRE 2016, LaMcube, 59000 Lille, France.
LA  - eng
GR  - 2018YFC0407006/National Key R&D Program of China/
GR  - SKHL1725/Open Fund of State Key Laboratory of Hydraulics and Mountain River 
      Engineering (Sichuan University)/
GR  - 2017M620838/China Postdoctoral Science Foundation/
PT  - Journal Article
DEP - 20200803
PL  - Switzerland
TA  - Materials (Basel)
JT  - Materials (Basel, Switzerland)
JID - 101555929
PMC - PMC7435461
OTO - NOTNLM
OT  - damage mechanics
OT  - elastoplastic
OT  - micromechanics
OT  - return mapping algorithm
OT  - sandstone
COIS- The authors declare no conflict of interest.
EDAT- 2020/08/07 06:00
MHDA- 2020/08/07 06:01
PMCR- 2020/08/03
CRDT- 2020/08/07 06:00
PHST- 2020/07/16 00:00 [received]
PHST- 2020/07/27 00:00 [revised]
PHST- 2020/08/01 00:00 [accepted]
PHST- 2020/08/07 06:00 [entrez]
PHST- 2020/08/07 06:00 [pubmed]
PHST- 2020/08/07 06:01 [medline]
PHST- 2020/08/03 00:00 [pmc-release]
AID - ma13153414 [pii]
AID - materials-13-03414 [pii]
AID - 10.3390/ma13153414 [doi]
PST - epublish
SO  - Materials (Basel). 2020 Aug 3;13(15):3414. doi: 10.3390/ma13153414.