Damage Identification in Concrete using Impact Non-Linear Reverberation Spectroscopy

Summary, in English

High amplitude non-linear acoustic methods have shown potential for the identification of micro damage in brittle materials such as concrete. Commonly, these methods evaluate a non-linearity parameter from the relative change in frequency and attenuation with strain amplitude. Here, a novel attenuation model is introduced to describe the free reverberation from a standard impact resonance frequency test, together with an algorithm for estimating the unknown model coefficients. The non-linear variation can hereby by analyzed over a wider dynamic range as compared to conventional methods. The experimental measurement is simple and fully compatible with the standardized free-free linear impact frequency test.

• Author: Unn Dahlén; Nils Rydén; Andreas Jakobsson
• Department/s: Mathematical Statistics; Engineering Geology; Statistical Signal Processing Group; Spatio-Temporal Stochastic Modelling Group; Biomedical Modelling and Computation
• Publishing year: 2015
• Language: English
• Pages: 15-25
• Publication/Series: NDT & E International
• Volume: 75
• Full text: - 1 MB; Download statistics
• Links: http://dx.doi.org/10.1016/j.ndteint.2015.04.002
• Document type: Journal article
• Publisher: Elsevier
• Topic: Signal Processing
• Keywords: on-destructive testing; Impact method; Reverberation spectroscopy
• Status: Published
• Research group: Statistical Signal Processing Group; Spatio-Temporal Stochastic Modelling Group; Biomedical Modelling and Computation
• ISBN/ISSN/Other: ISSN: 0963-8695