In some photoacoustic experiments, thermoelastic bendings of solid samples produce strong signals which cannot be analyzed by usual photoacoustic calculations. We propose a model that, using the thermoelastic equations, analytically explains the effect of this bending. It is found that the model agrees well with data obtained from an experiment sensitive to thermoelastic deformations only. Furthermore, the model is also consistent with previous piezoelectric-photoacoustic calculations. This experiment also leads to measurements of thermal diffusivities.
Radiative and non-radiative effects of a substrate on localized plasmon resonance of particles J. Appl. Phys. 112, 013529 (2012) Periodically focused modes in chains of dielectric spheres Appl. Phys. Lett. 100, 061123 (2012) Photoreflectance study of the energy gap and spin-orbit splitting in InNAs alloys Appl. Phys. Lett. 94, 151902 (2009) Second harmonic generation in random nonlinear dielectrics: Effective medium approximations and dilute limit expressions J. Appl. Phys. 105, 023102 (2009) A band-to-band Coulomb interaction model for refractive index spectra of ternary semiconductors Thermal diffusivities of metals can be accurately measured by the photoacoustic method. It is necessary, however, to use rear-surface illumination and to work at sufficiently high modulation frequency. Furthermore, to prevent mechanical vibrations of the sample due to its periodic dilatation ("drum effect"), this sample must be carefully fixed on the backing.
Please cite this article as: bertrand, L., geraud, Y., Le Garzic, E., Place, J., Diraison, M., Walter, B., Haffen, S., A multiscale analysis of a fracture pattern in granite: A case study of the Tamariu granite,The in-depth investigation of fractured reservoirs is mainly limited to geophysical data that 2 is in 3D and mostly on the scale of hundred meters to several kilometers or boreholes data that 3 is in 1D and at meter to lower scale. The study of outcropping analogs of buried reservoirs is 4 therefore a key tool for the characterization of the fault and fracture network at the reservoir 5 scale. Tamariu granite has been the subject of this study with the aim to analyze faults and 6 fractures from seismic to borehole scale. With the combination of satellite picture at different 7 resolution and field study, we perform a statistical analysis focused of the length and 8 orientation from infra centimeter crack to hundred kilometer length fault. On the whole range 9 of scale studied, i.e. on 7 orders of magnitude, we have defined a length distribution following 10 a power-law with an exponent a= -2. On the contrary to the length that can be modeled with a 11 unique law, the orientation data shows a variation depending on the scale of observation: as 12 the fault and fracture sets are suitable from the regional faults to the centimeter crack, the 13 proportion of the sets varies at each scale of observation.
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