PMID- 26836864
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20160531
LR  - 20181023
IS  - 1539-4522 (Electronic)
IS  - 1559-128X (Linking)
VI  - 54
IP  - 35
DP  - 2015 Dec 10
TI  - Optical strain for monitoring of concrete failure mechanism with discontinuity.
PG  - 10409-17
LID - 10.1364/AO.54.010409 [doi]
AB  - Finite-element-based digital image correlation (FEM-DIC) is one of the most 
      widely used noncontact techniques in the field of experimental mechanics for 
      measurement of deformation/strain. In this paper, the FEM-DIC method is refined 
      by introducing the concept of multilevel extended digital image correlation 
      (X-DIC), which also can capture deformation across discontinuity planes if they 
      exist in images. Using regular and enhanced displacements at each node, strain 
      tensors are estimated by applying the concept of smooth particle hydrodynamics 
      (SPH). Numerical works are carried out to check the accuracy level of the 
      developed algorithm by considering discrete discontinuity on the surface of a 
      sample. Work is further extended to determine displacements and strains developed 
      at the surface of several cubical concrete samples under uniaxial loading 
      conditions. The tests are conducted until fractures are developed in the 
      post-failure region. Using the concept of cumulative effective strain, a 
      parameter is identified, which can be used as a precursor in the object failure 
      process.
FAU - Deb, Debasis
AU  - Deb D
FAU - Bhattacharjee, Sudipta
AU  - Bhattacharjee S
LA  - eng
PT  - Journal Article
PL  - United States
TA  - Appl Opt
JT  - Applied optics
JID - 0247660
EDAT- 2016/02/03 06:00
MHDA- 2016/02/03 06:01
CRDT- 2016/02/03 06:00
PHST- 2016/02/03 06:00 [entrez]
PHST- 2016/02/03 06:00 [pubmed]
PHST- 2016/02/03 06:01 [medline]
AID - 333232 [pii]
AID - 10.1364/AO.54.010409 [doi]
PST - ppublish
SO  - Appl Opt. 2015 Dec 10;54(35):10409-17. doi: 10.1364/AO.54.010409.