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.

• Författare: Unn Dahlén; Nils Rydén; Andreas Jakobsson
• Avdelning/ar: Matematisk statistik; Teknisk geologi; Statistical Signal Processing Group; Spatio-Temporal Stochastic Modelling Group; Biomedical Modelling and Computation
• Publiceringsår: 2015
• Språk: Engelska
• Sidor: 15-25
• Publikation/Tidskrift/Serie: NDT & E International
• Volym: 75
• Fulltext: - 1 MB; Download statistics
• Länkar: http://dx.doi.org/10.1016/j.ndteint.2015.04.002
• Dokumenttyp: Artikel i tidskrift
• Förlag: Elsevier
• Ämne: Signal Processing
• Nyckelord: on-destructive testing; Impact method; Reverberation spectroscopy
• Status: Published
• Forskningsgrupp: Statistical Signal Processing Group; Spatio-Temporal Stochastic Modelling Group; Biomedical Modelling and Computation
• ISBN/ISSN/Övrigt: ISSN: 0963-8695