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Title: Estimation of crack and damage progression in concrete by quantitative acoustic emission analysis

Abstract

The kinematics of cracking can be represented by the moment tensor. To distinguish moment tensor components from acoustic emission waveforms, the SiGMA (simplified Green`s functions for moment tensor analysis) procedure was developed. By applying the procedure to bending tests of notched beams, cracks in the fracture process zone of cementitious materials can be identified by kinematic means. In addition to cracks, estimation of the damage level in structural concrete is also conducted, based on acoustic emission activity of a concrete sample under compression. Depending on the damage resulting from existing microcracks, acoustic emission generated behavior is quantitatively estimated by the rate process analysis. The damage mechanics are introduced to quantify the degree of damage. Determining the current damage level using acoustic emission without information on undamaged concrete is attempted by correlating the damage value with the rate process.

Authors:
 [1]
  1. Kumamoto Univ. (Japan). Dept. of Civil Engineering and Architecture
Publication Date:
OSTI Identifier:
355659
Resource Type:
Journal Article
Journal Name:
Materials Evaluation
Additional Journal Information:
Journal Volume: 57; Journal Issue: 5; Other Information: PBD: May 1999
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; CONCRETES; CRACK PROPAGATION; FRACTURE MECHANICS; CRACKS; ACOUSTIC EMISSION TESTING

Citation Formats

Ohtsu, Masayasu. Estimation of crack and damage progression in concrete by quantitative acoustic emission analysis. United States: N. p., 1999. Web.
Ohtsu, Masayasu. Estimation of crack and damage progression in concrete by quantitative acoustic emission analysis. United States.
Ohtsu, Masayasu. 1999. "Estimation of crack and damage progression in concrete by quantitative acoustic emission analysis". United States.
@article{osti_355659,
title = {Estimation of crack and damage progression in concrete by quantitative acoustic emission analysis},
author = {Ohtsu, Masayasu},
abstractNote = {The kinematics of cracking can be represented by the moment tensor. To distinguish moment tensor components from acoustic emission waveforms, the SiGMA (simplified Green`s functions for moment tensor analysis) procedure was developed. By applying the procedure to bending tests of notched beams, cracks in the fracture process zone of cementitious materials can be identified by kinematic means. In addition to cracks, estimation of the damage level in structural concrete is also conducted, based on acoustic emission activity of a concrete sample under compression. Depending on the damage resulting from existing microcracks, acoustic emission generated behavior is quantitatively estimated by the rate process analysis. The damage mechanics are introduced to quantify the degree of damage. Determining the current damage level using acoustic emission without information on undamaged concrete is attempted by correlating the damage value with the rate process.},
doi = {},
url = {https://www.osti.gov/biblio/355659}, journal = {Materials Evaluation},
number = 5,
volume = 57,
place = {United States},
year = {Sat May 01 00:00:00 EDT 1999},
month = {Sat May 01 00:00:00 EDT 1999}
}