Estimation of crack and damage progression in concrete by quantitative acoustic emission analysis
- Kumamoto Univ. (Japan). Dept. of Civil Engineering and Architecture
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.
- OSTI ID:
- 355659
- Journal Information:
- Materials Evaluation, Journal Name: Materials Evaluation Journal Issue: 5 Vol. 57; ISSN MAEVAD; ISSN 0025-5327
- Country of Publication:
- United States
- Language:
- English
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