Concrete cover characterisation using dynamic acousto-elastic testing and Rayleigh waves

Vu, Quang Anh; Garnier, Vincent; Chaix, Jean François; Payan, Cédric; Lott, Martin; Eiras, Jesús N.

doi:10.1016/j.conbuildmat.2016.03.116

Cited by 35 publications

(8 citation statements)

References 37 publications

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“…NMEMs are not simply a scientific curiosity. Understanding their complex mechanical behavior is a growing need for many applications, including the monitoring of building integrity in civil engineering [4,5], nuclear safety [6,7], bone fragility (e.g., microfractures) [8], the mechanisms of earthquake triggering [9], or the design of novel materials [10].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear elasticity in rocks: A comprehensive three-dimensional description

Lott

Remillieux

Garnier

et al. 2017

Phys. Rev. Materials

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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 acoustoelasticity testing in which a low-frequency "pump" wave induces a strain field in the sample and modulates the propagation of a high-frequency "probe" wave. Experiments are conducted to validate the formulation in a long thin bar of Berea sandstone. Several configurations of the pump and probe are examined: the pump successively consists of the first longitudinal and first torsional mode of vibration of the sample while the probe is successively based on (pressure) P and (shear) S waves. The theoretical predictions reproduce many features of the elastic response observed experimentally, in particular, the coupling between nonlinear and nonequilibrium dynamics and the three-dimensional effects resulting from the tensorial nature of elasticity.

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Section: Introductionmentioning

confidence: 99%

Nonlinear elasticity in rocks: A comprehensive three-dimensional description

Lott

Remillieux

Garnier

et al. 2017

Phys. Rev. Materials

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“…To solve this problem, it is important to record the current values of geometric dimensions when organizing regular technical inspections. In this case, having a number of data, it is possible to apply regression analysis [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] and build equations for the dependence of changes in geometric parameters. The resulting equation must be substituted into formula (3).…”

Section: Discussionmentioning

confidence: 99%

Estimation of the residual resource of wooden structures by changing geometric parameters of the cross-section

2021

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In this article, the authors propose a method for assessing the residual resource by changing the geometric parameters of wooden structures. A general formula for estimating the maximum service life is presented. Then a number of special cases are considered when calculating the ultimate service life for the first group of limiting states. As a result, formulas were derived for calculating the ultimate service life for various design cases: centrally tensioned, centrally compressed, bending members, members subject to an axial force with bending. The author considered the determination of the rate of change in geometric parameters at the macrolevel (visually observed changes) and microscopic (microcracks, breaks of bonds between atoms). Formulas for determining the rate of change of geometric parameters at the macro and micro levels are proposed. The advantages and disadvantages of this method are presented. The scope of its application is indicated.

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“…It was later shown that small modifications of this experimental setup allow one to investigate any material immersed in a coupling fluid, such as a plain block of a given solid material, watersaturated glass beads [24], gels or creams [25], or a suspension of particles [25,26]. Meanwhile, DAET method was also extended to experimentations in contact (without the need of immersing the sample in a water tank) to study materials such as rocks [27,28], concrete [29,30], or metals with cracks [31,32] under room-dry conditions.…”

Section: Experimental Setupsmentioning

confidence: 99%

“…A US probe wave is required to read the instantaneous change of phase velocity at different strain levels. While it is possible to use any kind of ultrasonic waves, bulk compressional wave is involved in most of the studies, while bulk shear wave [29,36], or surface wave such as direct or head wave [27,37], or Raleigh wave [29,30] remain anecdotic. The only requirement is to be able to measure the TOF of the probe wave and its variation (induced by the pump wave, see Sect.…”

Section: Ultrasonic Probe Wave: Type Amplitude Position and Orientationmentioning

confidence: 99%