An experimental study on acoustic emission energy as a quantitative measure of size independent specific fracture energy of concrete beams

被引：53

作者：

Sagar, R. Vidya ^{[1
]}

Prasad, B. K. Raghu ^{[1
]}

机构：

[1] Indian Inst Sci, Dept Civil Engn, Bangalore 560012, Karnataka, India

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2011年 / 25卷 / 05期

关键词：

Concrete; Fracture; Acoustic emission energy; Fracture energy; The size effect; PROCESS ZONE;

D O I：

10.1016/j.conbuildmat.2010.11.033

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Notched three point bend specimens (TPB) were tested under crack mouth opening displacement (CMOD) control at a rate of 0.0004 mm/s and during the fracture process acoustic emissions (AE) were simultaneously monitored. It was observed that AE energy could be related to fracture energy. An experimental study was done to understand the behavior of AE energy with parameters of concrete like its strength and size. In this study, AE energy was used as a quantitative measure of size independent specific fracture energy of concrete beams and the concepts of boundary effect and local fracture energy were used to obtain size independent AE energy from which size independent fracture energy was obtained. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：2349 / 2357

页数：9

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