Size effect on fracture properties of self-compacting concrete beams using DIC technique

The main objective of this study is to develop a new measurement technique without touching the measured object. digital image correlation (dic) is an advanced measurement technique used to measure the displacement of particles with very high accuracy. this powerful innovative technique is used to correlate two image segments to determine the similarity between them. for this study,three geometrically similar beam specimens of different sizes were cast and tested under three-point bending in a closed loop servo-controlled machine with crack mouth opening displacement control with a rate of opening of 0.0005 mm/sec. digital images were captured before loading (unreformed state) and at different instances of loading and analyzed using correlation techniques to compute surface displacement,crack opening and sliding displacement,load-point displacement,crack length and crack tip location. it was seen that crack mouth opening displacement and vertical load-point displacement computed using dic analysis match well with those experimentally measured. © 2017 just. all rights reserved.