PMID- 36676279
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20230201
IS  - 1996-1944 (Print)
IS  - 1996-1944 (Electronic)
IS  - 1996-1944 (Linking)
VI  - 16
IP  - 2
DP  - 2023 Jan 5
TI  - A Study of Strength Parameter Evolution and a Statistical Damage Constitutive 
      Model of Cemented Sand and Gravel.
LID - 10.3390/ma16020542 [doi]
LID - 542
AB  - Cemented sand and gravel (CSG) has a wide range of applications in dam 
      construction, and its properties are between rockfill and roller compacted 
      concrete (RCC). A difference in gel content will result in a variance in CSG's 
      structure and mechanical properties. To investigate the intricate structural 
      mechanical properties of CSG, this study conducted a series of laboratory tests 
      and associated discrete element analyses. Accordingly, the evolution law of the 
      strength parameters of CSG is explored and a statistical damage constitutive 
      model suitable for CSG is established. The main contributions of this study are 
      as follows: (1) The failure mechanism of the CSG was described from the 
      microscopic level, and the evolution law of the strength parameter cohesion and 
      friction angle of the CSG was analyzed and summarized. (2) Based on the particle 
      flow model, the energy development law and the spatiotemporal distribution law of 
      acoustic emission (AE) provide illustrations of the strain hardening-softening 
      transition features and the interaction between cohesion and friction of CSG. (3) 
      The evolution function between the strength parameter and the strain softening 
      parameter was built, and the critical strain softening parameter was determined 
      by the microcrack evolution law of the particle flow model. (4) The accuracy of 
      the evolution curve was confirmed by comparing it to experimental results. (5) 
      Based on the relationship between cohesion loss and material damage, a 
      statistical damage constitutive model was developed using the improved 
      Mohr-Coulomb strength criterion as the micro strength function. The constitutive 
      model can accurately describe the stress-strain curves of CSG with different gel 
      content. Furthermore, the model reflects the strain hardening-softening 
      properties of CSG and reveals the relationship between the weakening of cohesion 
      and material damage at the microscopic level. These findings provide valuable 
      guidelines for investigating the damage laws and microcosmic failure features of 
      CSG and other relevant materials.
FAU - Ren, Honglei
AU  - Ren H
AD  - Materials & Structure Engineering Department, Nanjing Hydraulic Research 
      Institute, Nanjing 210029, China.
FAU - Cai, Xin
AU  - Cai X
AD  - Materials & Structure Engineering Department, Nanjing Hydraulic Research 
      Institute, Nanjing 210029, China.
AD  - College of Mechanics and Materials, Hohai University, Nanjing 211100, China.
FAU - Wu, Yingli
AU  - Wu Y
AD  - Geotechnical Engineering Department, Nanjing Hydraulic Research Institute, 
      Nanjing 210029, China.
FAU - Jing, Peiran
AU  - Jing P
AD  - State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan 
      University, Wuhan 430072, China.
AD  - Dam Safety Management Department, Nanjing Hydraulic Research Institute, Nanjing 
      210029, China.
FAU - Guo, Wanli
AU  - Guo W
AD  - Geotechnical Engineering Department, Nanjing Hydraulic Research Institute, 
      Nanjing 210029, China.
LA  - eng
GR  - No. 51979094/National Natural Science Foundation of China/
GR  - No. Y318005/Fundamental Research Funds for Central Public Welfare Research 
      Institutes/
PT  - Journal Article
DEP - 20230105
PL  - Switzerland
TA  - Materials (Basel)
JT  - Materials (Basel, Switzerland)
JID - 101555929
PMC - PMC9861661
OTO - NOTNLM
OT  - Mohr-Coulomb strength criterion
OT  - acoustic emission
OT  - cemented sand and gravel (CSG)
OT  - particle flow
OT  - statistical damage
OT  - strength parameter
COIS- This manuscript has not been published before and is not being published 
      elsewhere. We declare there is no conflict of interest.
EDAT- 2023/01/22 06:00
MHDA- 2023/01/22 06:01
PMCR- 2023/01/05
CRDT- 2023/01/21 01:35
PHST- 2022/12/09 00:00 [received]
PHST- 2022/12/31 00:00 [revised]
PHST- 2023/01/02 00:00 [accepted]
PHST- 2023/01/21 01:35 [entrez]
PHST- 2023/01/22 06:00 [pubmed]
PHST- 2023/01/22 06:01 [medline]
PHST- 2023/01/05 00:00 [pmc-release]
AID - ma16020542 [pii]
AID - materials-16-00542 [pii]
AID - 10.3390/ma16020542 [doi]
PST - epublish
SO  - Materials (Basel). 2023 Jan 5;16(2):542. doi: 10.3390/ma16020542.