International E-publication: Publish Projects, Dissertation, Theses, Books, Souvenir, Conference Proceeding with ISBN.  International E-Bulletin: Information/News regarding: Academics and Research

Identification of Rheological Parameters of the linear viscoelastic model of borassus wood

    , , , , ,

Author Affiliations

  • 1Laboratoire d’Energétique et de Mécanique Appliquée (LEMA), EPAC, Bénin and Laboratoire de Matériaux et Structures (LAMS), ESGC Verechaguine A.K., Bénin
  • 2Laboratoire d’Energétique et de Mécanique Appliquée (LEMA), EPAC, Bénin and Laboratoire de Matériaux et Structures (LAMS), ESGC Verechaguine A.K., Bénin
  • 3Laboratoire d’Energétique et de Mécanique Appliquée (LEMA), EPAC, Bénin
  • 4Laboratoire d’Energétique et de Mécanique Appliquée (LEMA), EPAC, Bénin and Laboratoire de Matériaux et Structures (LAMS), ESGC Verechaguine A.K., Bénin
  • 5CRESA Forêt – Bois, Université de Dschang, Cameroun
  • 6Laboratoire d’Energétique et de Mécanique Appliquée (LEMA), EPAC, Bénin

Res. J. Material Sci., Volume 12, Issue (1), Pages 1-8, February,16 (2024)

Abstract

The aim of this work is to determine the rheological parameters of Borassus Aethiopum Mart which is taken into account for the study of a Borassus prestressed Reinforced Concrete beam by considering the model of Kelvin-Voigt. To achieve this objective, creeptests are carried out on samples of Borassus Aethiopum Mart, from the Pahou-Ahozon gallery forest in southern Benin, subjected to a constant bending stress along the beam. The moisture content of the samples is set at 12% and is obtained by oven drying. The loading level of the samples is set at 20% of the breaking load. Prior to the creep tests, the compressive and bending breaking stresses of Borassus Aethiopum Mart were determined. Then, the nonlinear least squares method is applied to the Kelvin-Voigt rheological model to identify the optimal values of these parameters. The dynamic elastic modulus E and dynamic viscosity constant η of Borassus Aethiopum Mart were calculated from the nonlinear least squares method, while its instantaneous elastic modulus E0 was calculated from Hooke's law. A comparison of the numerical model taken from the rheological representation made it possible to confirm the previous results.

References

  1. Trouy, M.C. & Triboulot, P. (2019)., Wood material-Structure and characteristics.,
  2. Foudjet, A. (1986)., Contribution à l, Doctoral dissertation, Lyon 1.
  3. Bourahla, N. (2005)., Résistance des matériaux de base., Université Saad Dahlab Blida, Edition GEOTEC.
  4. Montgomery, D. C., & Runger, G. C. (2010)., Applied statistics and probability for engineers., John wiley & sons.
  5. Bou Said, E. (2003)., Contribution à la modélisation des effets différés du bois et du béton sous conditions climatiques variables: application aux structures mixtes bois-béton., Doctoral dissertation, Lyon, INSA.
  6. Chevalier, Y. (1988)., Comportements élastique et viscoélastique des composites., Techniques de l’Ingénieur, 5.
  7. Houanou, K. A., Tchéhouali, A., & Foudjet, A. (2012)., Identification of rheological parameters of the linear viscoelastic model of species of tropical woods (Tectona grandis Lf and Diospyros mespiliformis)., Res J Eng Sci, 1(5), 17-24.
  8. Husson, J. M. (2009)., Loi de comportement viscoélastique avec effet mémoire. Application à la mécanosorption dans le bois., Docteur de l’Université de Limoges, UNIVERSITE DE LIMOGES.
  9. Nocedal, J., & Wright, S. J. (Eds.). (1999)., Numerical optimization., New York, NY: Springer New York.
  10. Salençon, J. (2009)., Viscoélasticité pour le calcul des structures., Editions Ecole Polytechnique.