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Title: Assessing the Dimensional Stability of Two Hardwood Species Grown in Turkey with Acoustic Measurements

Source: In: Gen. Tech. Rept. FPL-GTR-226. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory. p. 459-468.

Author(s)Dundar, Turker; Wang, Xiping; As, Nusret; Avci, Erkan

Publication Year: 2013  View PDF »

Category: Conference Proceedings
Associated Research Project(s):   FPL-4714-1B

Abstract: The objective of this study was to examine the potential of acoustic measurement as a rapid and nondestructive method to predict the dimensional stability of oak (Quercus petrea) and chestnut (Castanea sativa) that are commonly used in floor industry. Ultrasonic velocity, specific gravity, and radial, tangential and volumetric shrinkages were measured on seventy-four 20- by 20- by 30-mm specimens obtained from freshly cut oak and chestnut stems at forestlands located in northwest part of Turkey. The ultrasonic velocities of the specimens decreased with increasing equilibrium moisture content (EMC). We found that specific gravity was not a good predictor of the transverse shrinkages as indicated by relatively weak correlations. Ultrasonic velocity, on the other hand, was found to be a significant predictor of the transverse shrinkages for both oak and chestnut. The best results for prediction of shrinkages of oak and chestnut were obtained when the ultrasonic velocity and specific gravity were used together. The multiple regression models we developed in this study explained 77% of volumetric shrinkages in oak and 72% of volumetric shrinkages in chestnut. It is concluded that both ultrasonic velocity and specific gravity be employed as predicting parameters to evaluate the dimensional stability of wood during manufacturing process.

Keywords: dimensional stability, shrinkage, ultrasonic velocity, oak, chestnut

Publication Review Process: Non-Refereed (Other)

File size: 523 kb(s)

Date posted: 10/24/2013
RITS Product ID: 66546
Current FPL Scientist associated with this product
Wang, Xiping
Research Forest Products Technologist

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