Title: Determination of Double-K Fracture Parameters of Concrete Using Split-Tension Cube: A Revised Procedure

Author(s): Shashi Ranjan Pandey, Shailendra Kumar, and A. K. L. Srivastava

Publication: IJCSM

Volume: 10

Issue: 2

Appears on pages(s): 163–175

Keywords: split-tension cube test, three point bend test, concrete fracture, double-K fracture parameters, weight function, cohesive stress, size-effect.

DOI: 10.1007/s40069-016-0139-6

Date: 6/30/2016

Abstract:
This paper presents a revised procedure for computation of double-K fracture parameters of concrete split-tension cubespecimen using weight function of the centrally cracked plate of finite strip with a finite width. This is an improvement over theprevious work of the authors in which the determination of double-K fracture parameters of concrete for split-tension cube testusing weight function of the centrally cracked plate of infinite strip with a finite width was presented. In a recent research, it waspointed out that there are great differences between a finite strip and an infinite strip regarding their weight function and thesolution of infinite strip can be utilized in the split-tension specimens when the notch size is very small. In the present work,improved version of LEFM formulas for stress intensity factor, crack mouth opening displacement and crack opening displacementprofile presented in the recent research work are incorporated. The results of the double-K fracture parameters obtained usingrevised procedure and the previous work of the authors is compared. The double-K fracture parameters of split-tension cubespecimen are also compared with those obtained for standard three point bend test specimen. The input data required fordetermining double-K fracture parameters for both the specimen geometries for laboratory size specimens are obtained using wellknown version of the Fictitious Crack Model.