|
DETERMINATION OF ELASTICITY MODULUS OF ALEPPO PINE WOOD
(PINUS HALEPENSIS MILL.) WITH THE ULTRASOUND METHOD
Abdelhakim DAOUI
Assoc.Prof.Dr. - Universite M'hamed Bougara
Address: Boumerdès 35000 Algerie
E-mail: hdaouis@yahoo.fr
Abedellatif ZERIZER
Prof.Dr. - LMMC, GTT, Universite M'hamed Bougara
Address: Boumerdès 35000 Algerie
E-mail: zerizer_ab@yahoo.fr
Remy MARCHAL
Prof.Dr. - LABOMAP, ENSAM Cluny Address : 26 rue porte de Paris, Cluny 71250 France
E-mail: Remy.Marchal@CLUNY.ENSAM.fr
Abstract: With a view
to determining the mechanical properties - specifically
the modulus of elasticity - of fibrous composites,
the nondestructive methods present certain advantages.
The ultrasound technique, based on measuring the
propagation velocity of an impulse and considering
the elasticity coefficients of the material, enabled
us to deal with the study of a well-known local
species, namely Aleppo pine (Pinus halepensis
Mill.), with consideration of its physical parameters
such as moisture and density. The mean goal of
this step is to find correlations between the
acoustic behavior of the material and its physical
and mechanical characteristics.
Key words: wood, Aleppo pine, ultrasound
technique, modulus of elasticity, density.
REFERENCES
BORDONNE, P.A. (1989). Module dynamique et frottement
interieur dans le bois, mesures sur poutres flottantes
en vibrations naturelles. These de l'Institut
National Polytechnique de Lorraine, 109p.
BRANCHERIAU, L. (2002). Expertise mecanique des
sciages par analyses des vibrations dans le domaine
acoustique. These de l'universite de la mediterranee-Aix
Marseille II. Ecole superieure de mecanique de
Marseille, 267p.
BUCUR, V.; FEENEY, F. (2000). Attenuation of ultrasound
in solid wood. Utrasonics 30: 1992, pp. 76-81.
BUCUR, V. (2000). Anisotropy of wood expressed
by ultrasonic velocities. 12th International Symposium
on Nondestructive Testing of Wood. Sopron, Hungary,
2000, pp. 450.
BUCUR, V.; LANCELEUR, P.; ROGE, B. (2001). Acoustic
properties of wood in tridimensional representation
of slowness surfaces. Ultrasonics, Vol.40, 2001,
pp. 537-541.
BUCUR, V. (1981). Determination du module de Young
du bois par une methode dynamique sur carottes
de sondage. Annals of Forest Science., Vol.38
N° 2, 1981, pp. 283-298.
GERL, M.; ISSI, J.P. (1997). Traite des materiaux,
physique des materiaux. Presses polytechniques
et universitaires romandes, 1997.
OUIS, D. (2000). Detection of decay in logs through
measuring the dampening of bending vibrations
by means of a room acoustical technique. Wood
Science and Technology. Vol. 34. 2000, pp: 221-236.
SANDOZ, J.L. (1996). Ultrasonic solid wood evaluation
in industrial applications. 10th International
Symposium on Nondestructive Testing of Wood. 26.-28.09.1996
in Lausanne.
TIMOSHENKO, S.P. (1961) Theorie de l'elasticite.
Lib. Polytechnique Ch. Beranger, Chap.1.2eme edition.
|