Applying nonlinear resonant ultrasound spectroscopy to improving thermal damage assessment in concrete

C. Payan, V. Garnier, J. Moysan, P. A. Johnson
2007 Journal of the Acoustical Society of America  
Nonlinear resonant ultrasound spectroscopy ͑NRUS͒ consists of evaluating one or more resonant frequency peak shifts while increasing excitation amplitude. NRUS exhibits high sensitivity to global damage in a large group of materials. Most studies conducted to date are aimed at interrogating the mechanical damage influence on the nonlinear response, applying bending, or longitudinal modes. The sensitivity of NRUS using longitudinal modes and the comparison of the results with a classical linear
more » ... a classical linear method to monitor progressive thermal damage ͑isotropic͒ of concrete are studied in this paper. In addition, feasibility and sensitivity of applying shear modes for the NRUS method are explored.
doi:10.1121/1.2710745 pmid:17471756 fatcat:5hao57jcn5b6xfjtvokmdgnmmi