Size independent fracture energy from fracture energy release rate in plain concrete beams

Muralidhara, S and Prasad, Raghu BK and Singh, RK (2013) Size independent fracture energy from fracture energy release rate in plain concrete beams. In: ENGINEERING FRACTURE MECHANICS, 98 . pp. 284-295.

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Abstract

Size independent fracture energy and size effect on fracture energy are the key concerns for characterization of concrete fracture. Although there have been inconsistencies in results, a consensual fact is that the fracture energy from a large specimen is size independent. The fracture energy is proportional to the size of the fracture process zone (FPZ). FPZ size increases with size of the specimen, but the rate of increase of FPZ size decreases with increase in specimen size 1] implying that rate of increase of fracture energy decreases with increase in specimen size, more appropriately with increase in un-cracked ligament length. The ratio of fracture energy to the un-cracked ligament length almost becomes a constant at larger un-cracked ligament lengths. In the present study an attempt is made to obtain size independent fracture energy from fracture energy release rate. (C) 2012 Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Publication:	ENGINEERING FRACTURE MECHANICS
Publisher:	PERGAMON-ELSEVIER SCIENCE LTD
Additional Information:	Copyright for this article belongs to the PERGAMON-ELSEVIER SCIENCE LTD, ENGLAND.
Keywords:	Size independent fracture energy; Concrete; Un-cracked ligament length; Fracture process zone length; Fracture energy release rate
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	05 Apr 2013 09:49
Last Modified:	05 Apr 2013 09:51
URI:	http://eprints.iisc.ac.in/id/eprint/46332

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