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Address:

27 rue Roches Genes - CS 20265
63175 Aubière Cedex, France

Phone:

+33 4 73 28 81 31

E-mail:

benoit.blaysat@uca.fr

Benoît Blaysat

I am a Professor at Université Clermont Auvergne (UCA). I was recruited as an assistant professor in 2013 and have been full-professor since 2021. I am leading the “Experimental Mechanics” research group of Institut Pascal as a Digital Image Correlation and Localized Spectrum Analys expert and developer. As all French professors, I have a twofold mission, which consists in both teaching and researching. I have been in charge of the 1st and 2nd semesters of the Mechanical Engineering Master degree of my university since September 2017.

From computational to experimental mechanics

After a Ph. D. in computational mechanics, I decided to focus my research on experimental mechanics, more particularly on full-field measurement techniques and on the inverse problems raised by their use for material characterization purposes. Indeed, I intended to work on a topic closer to the experimental side of mechanics, and such topics particularly call for my expertises in computational mechanics. I consequently successfully applied to a post-doctoral fellowship founded by both the Eindhoven University of Technology (TU/e), the Netherlands, and the King Abdullah University of Science and Technology, Kingdom of Saudi Arabia. My work focused on the development of a mechanics-based DIC technique devoted to delamination characterization. Now, my core research mainly deals with the DIC method itself (metrological performance, algorithm performances and optimization) and with the Localized Spectrum Analysis (LSA, or Grid Method), but also on the use of their outputs in Experimental Mechanics

Current position

  • Since 2017 - Elected member of the Research Institute Council
    Relected in 2021 - Institut Pascal, Clermont-Ferrand, France
  • Since 2017 - Head of the "Experimental Mechanics" research group
    Institut Pascal, Clermont-Ferrand, France
  • Since 2017 - In charge of the Master of Mechanical Engineering, S1&2
    Université Clermont Auvergne, Clermont-Ferrand, France
  • Since 2020 - Member of the editorial board of the Strain Journal
    Wiley Online Library
  • Since 2020 - Co-leader of the DIC Challenge
    International DIC society, USA
  • Since 2021 - Co-leader of the M3G department
    62 staff members, Institut Pascal
  • Since 2023 - Secretary of the PhotoMechanics association
    France
  • Since 2024 - Associate editor of the Strain Journal
    Wiley Online Library

Educational activities

  • Mechanics of materials
  • Beam theory
  • Finite element method

Ancillary activities

  • Challenge leader - Society of Experimental Mechanics, USA
    leader of the "2D Challenge"
  • Lecturer - Fulll-field measurements in Experimental Mechanics
    EM Course Experimental  Engineering Mechanics - TU/e, the Netherlands

Publications

    2024
  • K. Jongchansitto, X. Balandraud, B. Blaysat, M. Grédiac, T. Jailin, J-B. Le Cam, P. Jongchansitto, and I. Preechawuttipong. Measuring forces in a 2D multi-contact system using the virtual fields method: Principle, simulations and experimental application to a three-particle system. European Journal of Mechanics - A/Solids, 106:105315, 2024.
  • F. Sur, B. Blaysat, and M. Grédiac. Characterizing the measurement resolution and measurement bias of Sampling Moiré. Optics and Lasers in Engineering, 177:108130, 2024
  • L-C. Nguedjio, J-S Mabekou Takam, R. Moutou Pitti, B. Blaysat, F. Zemtchou, A. Kosguine Mezatio, and P. Kisito Talla. Modeling the nonlinear creep behavior of Entandrophragma cylindricum wood by fractional derivative model. Mechanics of Time-Dependent Materials, 28:303–319, 2024
  • A. Vinel, M. Laquet, X. Balandraud, B. Blaysat, M. Grédiac, and T. Jailin. Full-field strain investiga- tion of twinned martensite in a thermally activated Cu–Al–Ni single crystal using Localized Spectrum Analysis. Acta Materialia, 264:119550, 2024.
    • 2023
  • M. Grédiac, X. Balandraud, B. Blaysat, T. Jailin, R. Langlois, F. Sur, and A. Vinel. Fine-tuning a deconvolution algorithm to restore displacement and strain maps obtained with lsa. Experimental Mechanics, 63(9):1509–1537, 2023.
  • S. Boukhtache, K. Abdelouahab, A. Bahou, F. Berry, B. Blaysat, M. Grédiac, and F. Sur. A lightweight convolutional neural network as an alternative to DIC to measure in-plane displacement fields. Optics and Lasers in Engineering, 161(107367), 2023.
  • K. Jongchansitto, P. Jongchansitto, X. Balandraud, I. Preechawuttipong, J. B. Le Cam, F. Blanchet, B. Blaysat, and M. Grédiac. Calorific analysis of the mechanical response of granular materials composed of ellipsoidal rubbery particles. Experimental Mechanics, 63:1135–1155, 2023.
  • J. Guyon, H. Chanal, B. Boudon, and B. Blaysat. Geometric modelling with first and second order defects of over-constrained Parallel Kinematic Machine. Mechanism and Machine Theory, 179(105120), 2023.
  • Y. Shi, B. Blaysat, H. Chanal, and M. Grédiac. Introducing Virtual DIC to remove interpolation bias and process optimal patterns. Experimental Mechanics, 63:637–653, 2023.
  • T. Jovani, B. Blaysat, H. Chanal, and M. Gr ́ediac. Applying the virtual fields method to measure during milling the through-thickness residual stress distribution in aluminum-alloy sheet material. Experimental Mechanics, 63(2):221–235, 2023.
    • 2022
  • T. Jovani, H. Chanal, B. Blaysat, and M. Grédiac. Direct residual stress identification during machining. Journal of Manufacturing Processes, 82:678–688, 2022.
  • Q. Bouyra, B. Blaysat, H. Chanal, and M. Grédiac. Using laser marking to engrave optimal patterns for in-plane displacement and strain measurement. Strain, 58(2):e12404, 2022.
  • H. Chanal, A. Guichard, B. Blaysat, and S. Caro. Elasto-dynamic modeling of an over-constrained parallel kinematic machine using a beam model. Machines, 10(3), 2022.
  • E. L. Nitu, M. Diakhaté, C. Badulescu, M. Grédiac, B. Blaysat, M. D. Iordache, A. Bosneag, J. Adrien, E. Maire, M. Dhondt, and Y. Demmouche. Analyzing defects and their effects on the strength of a three-layer FSW joint by using X-ray microtomography, Localized Spectrum Analysis, and Acoustic Emission. Materials Characterization, 190(112069), 2022.
  • G. Rebergue, B. Blaysat, H. Chanal, and E. Duc. In-situ measurement of machining part deflection with digital image correlation. Measurement, 187:110301, 2022.
  • P. L. Reu, B. Blaysat, E. Andò, K. Bhattacharya, C. Couture, V. Couty, D. Deb, S. S. Fayad, M. A. Iadicola, S. Jaminion, M. Klein, A. K. Landauer, P. Lava, M. Liu, L. K. Luan, S. N. Olufsen, J. Réthoré, E. Roubin, D. T. Seidl, T. Siebert, O. Stamati, E. Toussaint, D. Turner, C. S. R. Vemulapati, T. Weikert, J. F. Witz, O. Witzel, and J. Yang. DIC Challenge 2.0: Developing Images and Guidelines for Evaluating Accuracy and Resolution of 2D Analyses. Experimental Mechanics, 2022.
  • Y. Shi, B. Blaysat, H. Chanal, and M. Grédiac. Designing Patterns for DIC with Poisson Image Editing. Experimental Mechanics, 62(1093–1117), 2022.
  • T. Vermeij, J. A. Verstijnen, T. R. y Contador, B. Blaysat, J. Neggers, and J. P. Hoefnagels. A nanome- chanical testing framework for measurement of two-sided, high-resolution, microstructure-correlated SEM-DIC strain fields. Experimental Mechanics, 61:1625–1646, 2022.
    • 2021
  • H. Boudarel, J. D. Mathias, B. Blaysat, and M. Grédiac. Tracking in situ microbeads for detecting biofilm formation. Biotechnology and Bioengineering, 118(3):1244–1261, 2021.
  • S. Boukhtache, F. Berry, M. Grédiac, and B. Blaysat. Alternatives to bi-cubic interpolation based on FPGA. IEEE Transactions on Very Large Scale Integration Systems, 29(2):247–258, 2021.
  • H. Chanal, J.-B. Guyon, A. Koessler, Q. Dechambre, B. Boudon, B. Blaysat, and N. Bouton. Geo- metrical defect identification of a SCARA robot from a vector modeling of kinematic joints invariants. Mechanism and Machine Theory, 162(104339), 2021.
  • F. Sur, B. Blaysat, and M. Grédiac. On biases in displacement estimation for image registration, with a focus on Photomechanics. Journal of Mathematical Imaging and Vision, 63:777–806, 2021.
    • 2020
  • S. Boukhtache, K. Abdelouahab, F. Berry, B. Blaysat, M. Grédiac, and F. Sur. When Deep Learning Meets Digital Image Correlation. Optics and Lasers in Engineering, 136(106308), 2020.
  • S. Boukhtache, F. Berry, B. Blaysat, and M. Grédiac. FPGA-based architecture for bi-cubic interpola- tion: the best trade-off between precision and hardware resource consumption. Journal of Real-Time Image Processing, 2020.
  • M. Grédiac, B. Blaysat, and F. Sur. Comparing several spectral methods used to extract displacement fields from checkerboard images. Optics and Lasers in Engineering, 127(105984), 2020.
  • M. Grédiac, B. Blaysat, and F. Sur. On the optimal pattern for displacement field measurement: random speckle and DIC, or checkerboard and LSA? Experimental Mechanics, 60:509–534, 2020.
  • M. Issaoui, X. Balandraud, P. Miloro, I. Rivens, M. Grédiac, B. Blaysat, L. Ouchchane, A. Delabaerec, M.-P. Sauvant-Rochat, and D. Lemery. Temperature elevation measured in an instrumented phantom by B-mode imaging, Pulse Doppler, and Shear Wave Elastography. Ultrasound in Medicine & Biology, 46(12):3317–3326, 2020.
  • B. Blaysat, X. Balandraud, M. Grédiac, E. Vives, N. Barrera, and G. Zanzotto. Concurrent tracking of strain and noise bursts at ferroelastic phase fronts. Communications Materials, 1, 2020.
  • B. Blaysat, J. Neggers, M. Grédiac, and F. Sur. Towards criteria characterizing the metrological per- formance of full-field measurement techniques - Application to the comparison between local and global versions of DIC. Experimental Mechanics, 60(3):393–407, 2020.
  • R. Langlois, R. Cusset, J. Hosdez, V. Bonnand, B. Blaysat, L. Menut-Tournadre, J. Neggers, M. Coret, J. Henry, V. Doquet, M. Grédiac, V. Chiaruttini, M. Poncelet, H. Proudhon, N. Limodin, and J. Réthoré. Multi-partner benchmark experiment of fatigue crack growth measurements. Engineering Fracture Mechanics, 235:107157, 2020.
  • S. Qin, M. Grédiac, B. Blaysat, S. Ma, and F. Sur. Influence of the sampling density on the noise level in displacement and strain maps obtained by processing periodic patterns. Measurement, 173:108570, 2020.
    • 2019
  • M. Grédiac, B. Blaysat, and F. Sur. Extracting displacement and strain fields from checkerboard images with the Localized Spectrum Analysis. Experimental Mechanics, 59(2):207–218, 2019.
  • M. Grédiac, B. Blaysat, and F. Sur. A robust-to-noise deconvolution algorithm to enhance displacement and strain maps obtained with local DIC and LSA. Experimental Mechanics, 59(2):219–243, 2019.
  • M. Issaoui, X. Balandraud, M. Grédiac, B. Blaysat, L. Ouchchaneb, M. P. Sauvant-Rochat, and D. Lemery. Temperature rise caused by shear wave elastography, pulse-doppler and b-mode in bio- logical tissue: an infrared thermographic approach. Ultrasound in Medicine & Biology, 46(2):325–335, 2020.
    • 2018
  • M. C. Teguedi, B. Blaysat, E. Toussaint, S. Moreira, S. Liandrat, and M. Grédiac. Investigation of the tensile behavior of recycled asphalts in the small-strain domain with the grid method. Experimental Mechanics, 2018.
  • F. Sur, B. Blaysat, and M. Grédiac. Rendering deformed speckle images with a boolean model. Journal of Mathematical Imaging and Vision, 60(5):634–650, 2018.
  • H. Boudarel, J.-D. Mathias, B. Blaysat, and M. Grédiac. Towards standardized mechanical characterization of microbial biofilms: analysis and critical review. npj Biofilms and Microbiomes, 4(1):17, 2018.
  • G. Rebergue, B. Blaysat, H. Chanal, and E. Duc. Advanced DIC for accurate part deflection measurement in a machining environment. Journal of Manufacturing Processes, 33:10 – 23, 2018.
    • 2017
  • M. Grédiac, B. Blaysat, and F. Sur. A critical comparison of some metrological parameters characterizing local digital image correlation and grid method. Experimental Mechanics, 57(6):871–903, 2017.
  • X. Cerutti, K. Mocellin, S. Hassini, B. Blaysat, and E. Duc. Methodology for aluminium part machining quality improvement considering mechanical properties and process conditions. CIRP Journal of Manufacturing Science and Technology, 18(18–38), 2017.
  • F. Sur, B. Blaysat, and M. Grédiac. Towards computational photomechanics. ERCIM News, 108, 2017.
  • M. C. Teguedi, E. Toussaint, B. Blaysat, S. Moreira, S. Liandrat, and M. Grédiac. Towards the local expansion and contraction measurement of asphalt exposed to freeze-thaw cycles. Construction and Building Materials, 154:438–450, 2017.
    • 2016
  • M. C. Teguedi, B. Blaysat, E. Toussaint, S. Moreira, S. Liandrat, and M. Grédiac. Applying a full-field measurement technique for studying the local deformation in reclaimed asphalt pavements. Construction and Building Materials, 121:547–558, 2016.
  • F. Sur, B. Blaysat, and M. Grédiac. Determining displacement and strain maps immune from aliasing effect with the grid method. Optics and Lasers in Engineering, 86:317–328, 2016.
  • B. Blaysat, M. Grédiac, and F. Sur. Effect of interpolation on noise propagation from images to DIC displacement maps. International Journal for Numerical Methods in Engineering, 108(3):213–232, 2016.
  • J. Neggers, B. Blaysat, J. P. M. Hoefnagels, and M. G. D. Geers. On image gradients in digital image correlation. International Journal for Numerical Methods in Engineering, 105(4):243 – 260, 2016.
  • B. Blaysat, M. Grédiac, and F. Sur. On the propagation of camera sensor noise to displacement maps obtained by DIC - an experimental study. Experimental Mechanics, 56(6):919–944, 2016.
  • M. Grédiac, F. Sur, and B. Blaysat. Removing quasi-periodic noise in strain maps by filtering in the fourier domain. Experimental Techniques, 40(3):959–971, 2016.
  • M. Grédiac, F. Sur, and B. Blaysat. The grid method for in-plane displacement and strain measurement: A review and analysis. Strain, 52(3):205–243, 2016.
    • 2013
  • A. Moussawi, G. Lubineau, E. Florentin, and B. Blaysat. The constitutive compatibility method for identification of material parameters based on full-field measurements. Computer Methods in Applied Mechanics and Engineering, 265:1–14, 2013.
    • 2012
  • B. Blaysat, E. Florentin, G. Lubineau, and A. Moussawi. A dissipation gap method for full-field measurement-based identification of elasto-plastic material parameters. International Journal for Nu- merical Methods in Engineering, 91(7):685–704, 2012.
  • P. Ladevèze, B. Blaysat, and E. Florentin. Strict upper bounds of the error in calculated outputs of interest for plasticity problems. Computer Methods in Applied Mechanics and Engineering, 245-246(0):194 – 205, 2012.