Estimation of Wood Density without Weighing Using Bending Vibration and Static Bending Tests – Effect of Span-to-Height Ratio on the Estimation Accuracy

Abstract

The effects of the span-to-height ratio of wooden cantilevers on density estimation using bending vibration and static bending tests were examined. Bending vibration and static bending tests were performed for wooden cantilevers with various span-to-height ratios, and the densities of wooden cantilevers were estimated based on the measurements. The end condition of the cantilever was apart from the ideal condition for the smaller span-to-height ratios and approached to the ideal condition with the increase in the span-to-height ratio. The accuracy of the density without the correction decreased as the span-to-height ratio decreased. After correction based on the ideality of the end condition, the density could be accurately estimated without weighing the specimen.