Fracture Properties of Concrete-Concrete Interfaces Using Digital Image Correlation

Shah, SG and Kishen, Chandra JM (2011) Fracture Properties of Concrete-Concrete Interfaces Using Digital Image Correlation. In: Experimental Mechanics, 51 (3). pp. 303-313.

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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.

Item Type:	Journal Article
Publication:	Experimental Mechanics
Publisher:	Sage Publications
Additional Information:	Copyright of this article belongs to Sage Publications.
Keywords:	Concrete interface;Digital image correlation;Bimaterial fracture toughness;Energy release rate
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	07 Apr 2011 10:11
Last Modified:	07 Apr 2011 10:11
URI:	http://eprints.iisc.ac.in/id/eprint/36034

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