title: Dynamic acousto-elastic test using continuous probe wave and transient vibration to investigate material nonlinearity.
abstract: This study demonstrates the feasibility of the dynamic acousto-elastic effect of a continuous high frequency wave for investigating the material nonlinearity upon transient vibration. The approach is demonstrated on a concrete sample measuring 15×15×60cm(3). Two ultrasonic transducers (emitter and receiver) are placed at its middle span. A continuous high frequency wave of 500kHz propagates through the material and is modulated with a hammer blow. The position of the hammer blow on the sample is configured to promote the first bending mode of vibration. The use of a continuous wave allows discrete time extraction of the nonlinear behavior by a short-time Fourier transform approach, through the simultaneous comparison of a reference non-modulated signal and an impact-modulated signal. The hammer blow results in phase shifts and variations of signal amplitude between reference and perturbed signals, which are driven by the resonant frequency of the sample. Finally, a comprehensive analysis of the relaxation mechanisms (modulus and attenuation recovery) is conducted to untangle the coupled fast and slow hysteretic effects.
authors.affiliation: Instituto de Ciencia y Tecnología del Hormigón (ICITECH), Universitat Politècnica de València, Camino de Vera s/n, 46022 València, Spain. Electronic address: jeseifer@posgrado.upv.es.
authors.forename: J N
authors.initials: JN
authors.lastname: Eiras
authors.affiliation: Aix-Marseille Université, LMA UPR 7051, IUT, 413 Av. Gaston Berger, 13100 Aix-en-Provence, France.
authors.forename: Q A
authors.initials: QA
authors.lastname: Vu
authors.affiliation: Aix-Marseille Université, LMA UPR 7051, IUT, 413 Av. Gaston Berger, 13100 Aix-en-Provence, France.
authors.forename: M
authors.initials: M
authors.lastname: Lott
authors.affiliation: Instituto de Ciencia y Tecnología del Hormigón (ICITECH), Universitat Politècnica de València, Camino de Vera s/n, 46022 València, Spain.
authors.forename: J
authors.initials: J
authors.lastname: Payá
authors.affiliation: Aix-Marseille Université, LMA UPR 7051, IUT, 413 Av. Gaston Berger, 13100 Aix-en-Provence, France.
authors.forename: V
authors.initials: V
authors.lastname: Garnier
authors.affiliation: Aix-Marseille Université, LMA UPR 7051, IUT, 413 Av. Gaston Berger, 13100 Aix-en-Provence, France.
authors.forename: C
authors.initials: C
authors.lastname: Payan
keywords: Dynamic acousto-elastic test; Fast dynamics; Nonlinear acoustic; Nonlinear wave modulation; Slow dynamics