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An experimental study on fracture process zone in high strength concrete beams

Sagar, Vidya R and Prasad, Raghu BK (2008) An experimental study on fracture process zone in high strength concrete beams. In: IQCICF 2008.

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Official URL: http://iricen.gov.in/IRICEN1/modules.php?name=Jour...

Abstract

An attempt has been made to experimentally investigate the fracture process zone (FPZ) using Acoustic Emission (AE) method in High Strength Concrete (HSC) beams subjected to monotonically increasing load. Stress waves are released during the fracture process in materials, which cause acoustic emissions. AE energy released during the fracture of notched HSC beam specimens during Three Point Bend (TPB) tests is measured and is used to investigate the FPZ in the notched HSC beams having 28-day compressive strength of 78.0 MPa. The specimens are tested by Material Testing System (MTS) of 1200 KN capacity employing Crack Mouth Opening Displacement (CMOD) control at the rate of 0.0004 mmlsec in accordance with RILEM recommendations. A brief review on AE technique applied to concrete fracture is presented. The fracture process zone developed and the AE energy released during the fracture process in high strength concrete beam specimens are presented and discussed. It was observed that AE events containing higher energy are located around the notch tip. It may be possible to relate AE energy to fracture energy of concrete.

Item Type: Conference Paper
Department/Centre: Division of Mechanical Sciences > Civil Engineering
Date Deposited: 13 Oct 2011 10:26
Last Modified: 13 Oct 2011 10:26
URI: http://eprints.iisc.ernet.in/id/eprint/40832

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