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AE energy release during the fracture of HSC beams

Sagar, Vidya R and Prasad, Raghu BK (2009) AE energy release during the fracture of HSC beams. In: Magazine of Concrete Research, 61 (6). pp. 419-435.

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Abstract

An attempt has been made experimentally to investigate the acoustic emission (AE) energy release in high-strength concrete (HSC) beams subjected to monotonically increasing load. Acoustic emission energy release during the fracture process of the HSC beams is measured. Stress waves released during the fracture process in materials cause acoustic emissions. AE energy released during the fracture of a notched three-point bend plain concrete beam specimens having 28-day compressive strengths of 50.0 MPa, 69.0 MPa and 78.0 MPa and mortar (cement: sand (1: 4) by weight) specimens are studied. Mortar consists of one part cement and four parts sand by weight. The specimens were tested by a material testing system of 1200 kN capacity employing crack mouth opening displacement control at the rate of 0.0004 mm/s. The fracture energy and the AE energy released during the fracture process of all the tested TPB and mortar specimens are compared and discussed. The observations made in the present experimental study have some applications for monitoring the integrity of structures.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Thomas Telford.
Keywords: Acoustic-emission technique;cement-based materials;reinforced-concrete;process zone;aggregate size;tension; damage;attenuation;frequency; mechanics.
Department/Centre: Division of Mechanical Sciences > Civil Engineering
Date Deposited: 01 Oct 2009 11:12
Last Modified: 19 Sep 2010 05:45
URI: http://eprints.iisc.ernet.in/id/eprint/23256

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