Comparison of stiffness parameters of two kinds of date palm using nondestructive test

Sadatnia, Mohamad Ali; Sattari, Noshin; Roohnia, Mehran; Bahmani, Mohsen

doi:10.22092/ijwpr.2018.110641.1411

Document Type : Research Paper

Authors

¹ Assistant professor, Department of wood and paper science, Behbahan Khatam Al Anbia University of Technology, Behbahan, Iran

² MS.c., student, Department of wood and paper science, Behbahan Khatam Al Anbia University of Technology, Behbahan, Iran

³ Full Professor, Department of wood and paper science, Karaj Branch, Islamic Azad University. Karaj- Iran

⁴ Assistant professor, Department of forest science, Shahrekrod University, Shahrekord, Iran

https://doi.org/10.22092/ijwpr.2018.110641.1411

Abstract

The goal of this study was to determine the modulus of elasticity and modulus of rapture of two kinds of date palm (Khasi and Hajmohammadi) using static bending and dynamic (flexural vibration) techniques. To reduce the difference between static and dynamic stiffness values, the static bending modulus of elasticity was modified by taking into account the value of the shear deflection. In addition to, for better understanding of the mechanical properties of date palm, values were compared with those measured for poplar samples. The results showed that, in Khasi the mean values of the modulus of elasticity obtained by flexural vibration, the static modulus of elasticity, the modified static modulus of elasticity and as well as the modulus of rapture were 47, 67,68 and 38% less than those measured for Hajmohammadi respectively. In comparing with date palm, values measured for poplar samples were more pronounced. The difference between dynamic and static values of modulus recorded for Khasi, Hajmohammadi and poplar samples were 63, 40 and 19% respectively. After modification of the static values, the difference was reduced in to 3% for Khasi, 6% for Hajmohammadi and 7 % for poplar experimental samples. Finally the significant correlation coefficients were found between the static and the dynamic modulus of elasticity for both two kinds of date palm.

Keywords

Main Subjects

Physics and Mechanical Wood

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Comparison of stiffness parameters of two kinds of date palm using nondestructive test

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Volume 33, Issue 1 - Serial Number 62April 2018Pages 133-141

Volume 33, Issue 1 - Serial Number 62
April 2018
Pages 133-141