PMID- 27098209
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20170113
LR  - 20181113
IS  - 2045-2322 (Electronic)
IS  - 2045-2322 (Linking)
VI  - 6
DP  - 2016 Apr 21
TI  - Optical strain based pre-failure indication in failure process of geomaterials.
PG  - 24741
LID - 10.1038/srep24741 [doi]
LID - 24741
AB  - Multilevel extended digital image correlation (X-DIC) technique based on finite 
      element method (FEM) is applied for measuring deformation of geomaterials under 
      uni-axial loading condition. The concept of Smooth Particle Hydrodynamics (SPH) 
      is introduced for smoothing computed displacements as well as for calculating 
      strain tensors at every nodal point of FEM mesh. Cumulative effective strain 
      estimated from strain tensors is found to be a well suited parameter to identify 
      the change in stress-strain behaviour in experimented samples. Further analysis 
      suggests that onset of microcrack development and yielding in samples can also be 
      identified using this parameter. Based on these findings, an indicator is 
      developed for determining onset of both microcrack development and yielding in 
      geomaterials. This indicator is found to be related to volumetric strains and may 
      also signify dilation of the sample. The potential of the developed indicator is 
      tested by conducting four experimental works with concrete and rock samples.
FAU - Bhattacharjee, Sudipta
AU  - Bhattacharjee S
AD  - Advanced Technology Development Center, IIT Kharagpur, 721302 India.
FAU - Deb, Debasis
AU  - Deb D
AD  - Department of Mining Engineering, IIT Kharagpur, 721302 India.
LA  - eng
PT  - Journal Article
DEP - 20160421
PL  - England
TA  - Sci Rep
JT  - Scientific reports
JID - 101563288
SB  - IM
PMC - PMC4838843
EDAT- 2016/04/22 06:00
MHDA- 2016/04/22 06:01
PMCR- 2016/04/21
CRDT- 2016/04/22 06:00
PHST- 2015/12/08 00:00 [received]
PHST- 2016/04/04 00:00 [accepted]
PHST- 2016/04/22 06:00 [entrez]
PHST- 2016/04/22 06:00 [pubmed]
PHST- 2016/04/22 06:01 [medline]
PHST- 2016/04/21 00:00 [pmc-release]
AID - srep24741 [pii]
AID - 10.1038/srep24741 [doi]
PST - epublish
SO  - Sci Rep. 2016 Apr 21;6:24741. doi: 10.1038/srep24741.