Experimental Mechanics

, Volume 51, Issue 3, pp 303–313

Fracture Properties of Concrete–Concrete Interfaces Using Digital Image Correlation

Article

Abstract

The mode I and mode II fracture toughness and the critical strain energy release rate for different concrete–concrete jointed interfaces are experimentally determined using the Digital Image Correlation technique. Concrete beams having different compressive strength materials on either side of a centrally placed vertical interface are prepared and tested under three-point bending in a closed loop servo-controlled testing machine under crack mouth opening displacement control. Digital images are captured before loading (undeformed state) and at different instances of loading. These images are analyzed using correlation techniques to compute the surface displacements, strain components, crack opening and sliding displacements, load-point displacement, crack length and crack tip location. It is seen that the CMOD and vertical load-point displacement computed using DIC analysis matches well with those measured experimentally.

Keywords

Concrete interface Digital image correlation Bimaterial fracture toughness Energy release rate 

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Copyright information

© Society for Experimental Mechanics 2010

Authors and Affiliations

  1. 1.Department of Civil EngineeringIndian Institute of ScienceBangaloreIndia

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