کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
295344 511541 2012 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Nonlinear acoustic characterization of micro-damaged materials through higher harmonic resonance analysis
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
پیش نمایش صفحه اول مقاله
Nonlinear acoustic characterization of micro-damaged materials through higher harmonic resonance analysis
چکیده انگلیسی

A method developed for the analysis of nonlinear systems is applied for the first time to non-destructive testing of diverse materials using vibrations and elastic waves. This method allows to extract the vibrational/acoustical responses of the system, at the excitation frequency and importantly, also at higher harmonics, with the help of a nonlinear convolution signal analysis. It is then possible to make use of the robust nonlinear resonance method together with the harmonic generation method in order to analyze the nonlinear elastic resonances of a sample at excitation frequency harmonics. Definitions of the nonlinear hysteretic parameters associated to higher harmonic resonances are provided. The bases of the signal analysis method are also described. A higher sensitivity to the presence of gradual damage compared to the classical nonlinear resonance method is demonstrated experimentally for diverse materials and configurations.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: NDT & E International - Volume 45, Issue 1, January 2012, Pages 1–8
نویسندگان
, , , , ,