Cédric Payan

Cédric Payan
Laboratoire de Mécanique et d’Acoustique · Waves and Imaging Team

PhD , DSc

About

119
Publications
21,079
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
1,396
Citations
Additional affiliations
August 2011 - January 2012
Los Alamos National Laboratory
Position
  • Invited
September 2008 - present
Aix-Marseille Université
Position
  • maitre de conferences
Education
June 2014 - June 2014
Aix-Marseille Université
Field of study
  • Sciences
December 2004 - November 2007
Aix-Marseille Université
Field of study
  • Acousitcs

Publications

Publications (119)
Article
Full-text available
We study theoretically and experimentally the mechanisms of nonlinear and nonequilibrium dynamics in geomaterials through dynamic acoustoelasticity testing. In the proposed theoretical formulation, the classical theory of nonlinear elasticity is extended to include the effects of conditioning. This formulation is adapted to the context of dynamic a...
Article
Full-text available
This paper presents an ultrasonic non-destructive testing method to locally characterize composite material damage through the analysis of the anisotropy behavior variation induced by damage. The approach is based on shear wave contact measurements and analyses shear wave birefringence to estimate variation of the attenuation coefficient and shear...
Article
Full-text available
Nuclear material containment buildings are required to be periodically inspected to assure good quality conditions. To this end, there is increasing interest in developing efficient and economical testing techniques to monitor and inspect these structures. In this paper we study the dynamic behavior of a 1/3 mock-up containment structure and its in...
Article
This study investigates the application of different ultrasonic Non-Destructive tests to assess Delayed Ettringite Formation, in concrete samples exhibiting low kinetic expansions (and up to 0.21%). Linear and nonlinear Resonant Ultrasonic Spectroscopy and Acoustic Emission tests were used. Scanning Electron Microscopy and optical microscopy observ...
Article
Full-text available
This paper shows the complementarity of two nonlinear ultrasonic imaging methods to characterize closed macro cracks in concrete. A time reversal mirror is used to locally probe and image the nonlinearity of a cracked region. Two nonlinear parameters are extracted to map the cracked region. The image obtained using the first parameter relates the h...
Article
Microbubble clouds greatly affect the acoustic behaviour of systems such as liquid-filled Helmholtz resonators. Gas microbubbles change the resonator’s behaviour from quasi-linear to mostly non-linear, together with the appearance of hysteretic phenomena and desymmetrisation of the temporal response or a softening effect with a drop in the resonanc...
Article
The correlation between Interfacial Transition Zone (ITZ) and the diffusion of ultrasound for the Non Destructive Evaluation of thermally damaged concrete is investigated in this study. As most damages first emerge from the ITZ, it is necessary to understand the ultrasonic wave/ITZ interaction. This paper focuses on the use of the diffusivity param...
Chapter
Full-text available
A better understanding of the mechanical behaviour of child bone is essential to improve the diagnosis of pediatric bone disorders that may influence bone development. Even though the process of bone growth is well described, there are still lacks of knowledge on intrinsic material properties of child bone and particularly on child bone considered...
Article
This study investigates the use of the operational vibrations produced during the Integrated Leak Rate Test of nuclear power plant containment buildings for further informing on its mechanical condition. The experiment is performed on a 1:3-scale containment building mock-up. The results show that meaningful vibrations were generated during the pre...
Article
Full-text available
In this study, different alternatives to detect and localize damage from linear and nonlinear vibration responses were investigated. These alternatives were compared on two concrete slabs subjected to different damage extents. Linear and nonlinear modal test configurations were considered. The variations of linear resonant frequencies, modal assura...
Article
Full-text available
The effect of the Interfacial Transition Zone (ITZ) on ultrasonic wave attenuation and velocity in concrete is investigated in this study. These two parameters are often used to characterize the concrete microstructure. They can be analyzed through numerical simulations of wave propagation in concrete and validated with experimental data. However,...
Article
A general process is proposed to experimentally design anisotropic inhomogeneous metamaterials obtained through a change of coordinates in the Helmholtz equation. The method is applied to the case of a cylindrical transformation that allows cloaking to be performed. To approximate such complex metamaterials we apply results of the theory of homogen...
Preprint
A general process is proposed to experimentally design anisotropic inhomogeneous metamaterials obtained through a change of coordinate in the Helmholtz equation. The method is applied to the case of a cylindrical transformation that allows to perform cloaking. To approximate such complex metamaterials we apply results of the theory of homogenizatio...
Article
We propose a technique to measure the velocity of a bubble cloud based on the coda correlation. The method is founded on successive recordings of multiple scattered waves from a bubble cloud. Our model predicts the dependence between the correlation coefficient of these coda waves and the velocity of the bubble cloud under diffusion approximation....
Article
Argon microbubbles will exist in the primary sodium of the next generation of sodium-cooled fast reactors (SFR). Due to its opacity, acoustic methods will be used for the in-service inspection in these reactors, but the presence of such bubbles will greatly affect ultrasonic wave propagation. Moreover, these bubbles can lead to the formation of gas...
Chapter
Full-text available
This chapter introduces bases of nonlinear mesoscopic elasticity and presents a novel approach to model and numerically simulate the dynamical behavior of this class of material. Under dynamical solicitation, these so-called nonclassical materials exhibit two different time-dependent nonlinear mechanisms termed “fast” (nonlinear elasticity) and “sl...
Preprint
Full-text available
We propose an alternative approach called backward transformation for the design of platonic cloaks, without resorting to in-plane body forces and pre-stresses, which can lead to unphysical features. It is shown that the Kirchhoff-Love equation for an anisotropic heterogeneous plate is actually form invariant for a class of transformations with a v...
Conference Paper
Full-text available
In 4th generation nuclear reactors cooled with liquid sodium, argon microbubbles are present in the primary sodium. Due to the opacity of liquid sodium, acoustic control methods are chosen for operating inspections. However, this bubble presence greatly affects the acoustical properties of the medium. In bubbly liquids, nonlinear propagation can ar...
Article
Full-text available
A scaling subtraction method was proposed to analyze the radio frequency data from cancer cell samples exposed to an anti-cancer drug and to estimate a nonlinear parameter. The nonlinear parameter was found to be well correlated (R2 = 0.62) to the percentage of dead cells in apoptosis and necrosis. The origin of the nonlinearity may be related to a...
Conference Paper
In civil engineering, the follow-up of the structures’ concrete can be made by destructive testing. That is not possible in the case of nuclear power plants. So Non Destructive Evaluations are a solution for evaluating the concrete of the containment. NDEs are applied in civil engineering but each structure is a specific case due to its geometry, i...
Article
Full-text available
In this paper, the multimodal nonlinear elastic behavior of concrete, which is representative of a consolidated granular material, is modeled numerically. Starting from a local three-dimensional softening law, the initial stiffness properties are re-estimated according to the local strain field. The experiments deal with samples of thermally damage...
Article
In this paper, the multimodal nonlinear elastic behavior of concrete, which is representative of a consolidated granular material, is modeled numerically. Starting from a local three-dimensional softening law, the initial stiffness properties are re-estimated according to the local strain field. The experiments deal with samples of thermally damage...
Article
Full-text available
This study envisages the use of modal analysis for monitoring the structural health of radioactive waste packages. To this end, the calibration of a numerical model that describes the dynamic behavior is a critical issue for the success in damage detection. In this study, experimental modal analysis was conducted on a radioactive waste package mock...
Conference Paper
This study proposes the use of modal analysis data to inform about the mechanical and durability performance of concrete during the service life of the radioactive waste packages. Experimental modal analysis is conducted on a radioactive waste package mockup. Experimental modal analysis data is subsequently used to calibrate a finite element model...
Chapter
Ultrasonic testing is a technique frequently used in the field of NDE given the fact that ultrasonic waves are directly related to the mechanical behavior of materials. It is for this reason that mechanical waves are often involved in solid material testing and the evaluation of their mechanical properties. As such, ultrasonic velocity is often use...
Article
Full-text available
In this paper, a time reversal mirror is used to remotely focus symmetric or antisymmetric modes in a plate of arbitrary shape without the need of precise knowledge about material properties and geometry. The addition or subtraction of the forward motions recorded by two laser beams located on both sides of the plate allows, respectively, to focus...
Article
We study theoretically and experimentally the mechanisms of nonlinear and nonequilibrium dynamics in geomaterials through dynamic acousto-elasticity testing. In the proposed theoretical formulation, the classical theory of nonlinear elasticity is extended to include the effects of conditioning. This formulation is adapted to the context of dynamic...
Conference Paper
In 4th generation nuclear reactors cooled with liquid sodium,argonmicrobubbles are present in the primary sodium. Due to the opacity of liquid sodium, acoustic control methods are chosen for operating inspections but this bubble presence greatly affects the acoustical properties of the medium. It is therefore required to characterize the microbubbl...
Conference Paper
Full-text available
Two functions are regularly tested on containment walls in order to anticipate a possible accident. The first is mechanical to resist a possible internal over-pressure and the second is to prevent leakage. The AAPR reference accident is the rupture of a pipe in the primary circuit of a nuclear plant. In this case, the pressure and temperature can r...
Article
Full-text available
This letter reports on a method for producing on demand calibrated bubbles in a non-chemically controlled solution using localized micro-electrolysis and ultrasound. Implementing a feedback loop in the process leads to a point source of stable mono-dispersed microbubbles. This approach overcomes the inertial constraints encountered in microfluidics...
Article
We demonstrate the equivalence between local and global measures of nonclassical nonlinear elasticity in a slender resonant bar of Berea sandstone. Nonlinear effects are first measured globally using Nonlinear Resonance Ultrasound Spectroscopy (NRUS), which monitors the relative shift of the resonance frequency as a function of the maximum dynamic...
Article
Full-text available
In this letter, the equivalence between local and global measures of nonclassical nonlinear elasticity is established in a slender resonant bar. Nonlinear effects are first measured globally using nonlinear resonance ultrasound spectroscopy (NRUS), which monitors the relative shift of the resonance frequency as a function of the maximum dynamic str...
Article
Full-text available
This letter presents a three-dimensional model to describe the complex behavior of nonlinear mesoscopic elastic materials such as rocks and concrete. Assuming isotropy and geometric contraction of principal stress axes under dynamic loading, the expression of elastic wave velocity is derived, based on the second-order elastic constants (λ,μ), third...
Article
Full-text available
In this Letter, the tensorial nature of the nonequilibrium dynamics in nonlinear mesoscopic elastic materials is evidenced via multimode resonance experiments. In these experiments the dynamic response, including the spatial variations of velocities and strains, is carefully monitored while the sample is vibrated in a purely longitudinal or a purel...
Conference Paper
This paper presents local non-destructive evaluation of concrete cover by using surface Rayleigh wave in nonlinear Dynamic Acousto-Elasticity (DAE) measurement. Dynamic non classical nonlinear elastic behavior like modulus decrease under applied stress and slow dynamic process has been observed in many varieties of solid, also in concrete. The meas...
Article
Nonlinear Resonant Ultrasound Spectroscopy (NRUS) has been used extensively over the last two decades to quantify, through the nonlinear parameter α, the hysteretic nonlinearity of materials for geophysical, biomedical, and civil engineering applications. This technique relies on the variations of the damping and frequency of a resonance mode with...
Conference Paper
Full-text available
French Projects of Investment for the Future, called “Research for Nuclear Safety and Radiation Protection” have been initiated to further research on the causes, the management, the impact of the observed nuclear accidents and to propose and validate solutions to limit the risk and the consequences. In this context the "Non Destructive Evaluation...
Conference Paper
Full-text available
The nonlinear acoustic applied to non-destructive evaluations is a new tool for assessing the properties of concrete with a high sensitivity. Today, the evaluation of concrete properties as a function of the depth is often difficult. In this paper we propose a new approach using Rayleigh waves for the evaluation of nonlinear properties of the concr...
Article
Full-text available
Child cortical bone tissue is rarely studied because of the difficulty of obtaining samples. Yet the preparation and ultrasonic characterization of the small samples available, while challenging, is one of the most promising ways of obtaining information on the mechanical behavior of non-pathological children׳s bone. We investigated children׳s cort...
Article
Full-text available
This manuscript presents a synthesis of my research works since my hiring at the Aix en Provence Technological University Institute, ES&H department, in 2008 as a “maître de conferences” (Assistant Professor). My activities were conducted at the Laboratory of Non Destructive Evaluation, affiliated to the Laboratory of Mechanics and Acoustics (LMA C...
Thesis
Full-text available
Ce mémoire présente un résumé de mes recherches, effectuées depuis mon recrutement en tant que Maître de Conférences en 2008 au département Hygiène Sécurité Environnement de l’IUT d’Aix. Elles ont été conduites au Laboratoire de Caractérisation Non Destructive d’Aix, rattaché au Laboratoire de Mécanique et d’Acoustique (LMA CNRS UPR7051) en 2012. L...
Article
Full-text available
Resonant ultrasound spectroscopy (RUS) is a powerful and established technique for measuring elastic constants of a material with general anisotropy. The first step of this technique consists of extracting resonance frequencies and damping from the vibrational frequency spectrum measured on a sample with free boundary conditions. An inversion techn...
Conference Paper
Full-text available
Rationale and aim: Within the context of divers' decompression illness prevention, ultrasonic detection and sizing of circulating microbubbles in blood is of great interest. In order to be representative of the divers gas tension level (supersaturation) and thus, to optimize decompression stages, the measurements (made in the right ventricle region...
Article
Full-text available
An experimental method for characterizing microbubbles’ oscillations is presented. With a Dual Frequency ultrasound excitation method, both relative and absolute microbubble size variations can be measured. Using the same experimental setup, a simple signal processing step applied to both the amplitude and the frequency modulations yields a two-fol...
Article
Full-text available
Heterogeneous materials, such as rocks and concrete, have a complex dynamics including hysteresis, nonlinear elasticity and viscoelasticity. It is very sensitive to microstructural changes and damage. The goal of this paper is to propose a physical model describing the longitudinal vibrations of this class of material, and to develop a numerical st...
Patent
Full-text available
Procédé pour détecter une inclusion (3) dans un milieu, comprenant l'émission d'une onde acoustique d'excitation apte à générer une oscillation temporelle d'une géométrie d'une inclusion localisée dans le milieu, l'émission d'une onde acoustique de détection apte à être réfléchie par l'inclusion pour former une onde acoustique réfléchie, l'acquisit...
Article
Full-text available
Developed in the late 80’s, Nonlinear Resonant Ultrasound Spectroscopy (NRUS) has been widely employed in the field of material characterization. Most of the studies assume the measured amplitude to be proportional to the strain amplitude which drives nonlinear phenomena. In 1D resonant bar experiments, the configuration for which NRUS was initiall...
Article
Full-text available
The aim of this paper is to improve knowledge about adhesion strength in single-lap joints by the comparison of data from both nondestructive testing (NDT) and standard mechanical tests. This study presents a high-frequency ultrasonic imaging of aluminum–epoxy–aluminum joints that were carefully chemically prepared using two different surface treat...
Article
Full-text available
In this Letter, the time reversal mirror is used to focus elastic energy at a prescribed location and to analyze the amplitude dependence of the focus signal, thus providing the nonlinearity of the medium. By varying the frequency content of the focused waveforms, the technique can be used to probe the surface, by penetrating to a depth defined by...
Article
Full-text available
The potential of nonlinear acoustics indicators for concrete NDE is established. Their large sensitivity has been shown regarding damage and some pathology for years. The physics of nonlinearity is introduced; experimental means to measure such parameters are presented as well as associated limitations. Qualitative results obtained in the presence...