Document Type : Research Paper

Authors

1 Islamic Azad University- Chalous branch

2 Islamic Azad University

3 Faculty member of Some'eh Sara Poly technique

4 Islamic Azad University, chalous branch

Abstract

Abstract
The aim of present study was to determine the relationship between ultrasonic wave velocity and mechanical properties of particleboard panels. For this purpose, homogenous and layering particleboards were made by 0/7 g/cm3 density and 16 mm thickness. After conditioning and preparing samples, ultrasonic wave velocity was measured in different directions of samples. Then modulus of elasticity, modulus of rupture and internal bonding of samples were measured by mechanical test machine. Result indicated that ultrasonic wave velocity of particleboard samples was higher in longitudinal direction than other directions. Relationship between ultrasonic wave velocity and mechanical properties was determined by linear correlation regression. Correlations between ultrasonic wave velocity and modulus of elasticity, modulus of rupture and internal bonding were significant in thickness direction of particleboard samples. Correlations between ultrasonic wave velocity and modulus of elasticity, modulus of rupture and internal bonding were significant in thickness direction of particleboard samples. Correlations between ultrasonic wave velocity and modulus of elasticity, modulus of rupture and internal bonding were significant in thickness direction of particleboard samples.

Keywords

Main Subjects

-Abbasi Marasht, A., 2004. Study on Orthotropical
Properties of Particleboard and fiberboard Using
Ultrasonic Technique, MSc. Thesis, Tarbiat
Modares University, 72 pages.
- Behjati, S., 2008, Nondestructive evaluation of wood
plastic composites using ultrasonic techniques, MSc.
Thesis, Tarbiat Modares University, 51 pages.
-Bodig, J., and Jayne, B.A., 1989. Mechanics of Wood
and Wood Composites, Tehran University
Publications, 680 pages.
-Bucur, V., and Feeney, F.,1992. Attenuation of
Ultrasound in solid Wood, Ultrasonics, 30:76-81.
-Kazemi Najafi, S., 2002. Mechanical (Elastic
Constants) characterization of particleboard by
ultrasonic technique, Ph.D. Thesis, University of
Tehran, 127 pages.
-Kazemi Najafi, S., 2011. Introduction on wood
nondestructive tests, NDT Workshop, Tarbiat
Modares University.
-Masoudifar, S., Kazemi Najafi, S., Ghofrani, M., and
Zaki Dizaji, H., 2011. Effect of finger joint and scarf
Joint on ultrasonic parameters, Journal of Forest and
Wood Products. Iranian Journal of Natural
Resources. 46 (1): 77-89.