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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/1286

Title: Predicting tensile properties of finger-jointed tropical african hardwoods using longitudinal vibration method
Authors: Ayarkwa, J.
Hirashima, Y.
Sasaki, Y.
Issue Date: 2000
Publisher: Ghana Journal of Forestry
Citation: Ghana Journal of Forestry, vol. 9
Abstract: The longitudinal vibration technique was examined as a means of predicting ultimate tensile strength and tension modulus of elasticity of finger join-ted tropical African hardwoods using three different finger pro- files. Modulus of elasticity measured using the longitudinal vibration technique (i.e, dynamic MOE) was. significantly correlated to static tension modulus of elasticity (i.e. tension MOE) for 10, 18 and 20 mm long finger profiles studied for Obeche (Triplochiton scleroxylon), Mnkore (Tieghemella heckelii) and Moabi (Baillonella toxisperma). Dynamic MOE was also significantly correlated to tension MOE for the com- bined data for each species, and for the three species. High correlation coefficient of r= 0.89 teas obtained for the regression of the combined data for the three species, and the regression model derived was also highly significant (a < 0.001). Correlation-between dynanmic MOE and ultimate tensile strength was, generally, higher than that between tension MOE and ultimate tensile strength, for all the finger profiles studied for the-three species. Correlation coefficient obtained for the combined data for the 18 mm finger profile of the three species (r = 0.69) was high, and the regression model derived highly significant (a < 0.001). The lower 5 % exclusion limit line derived for the regressions of dynamic MOE as a function of tension MOE and tensile strength may be useful far predicting the static tensile properties of the three tropical hardwoods. Within the limits of the study, the longitudinal vibration technique; which is easier than the static test mm,/ be useful as a non-destructive method for accurately predicting tensile properties of finger jointed tropical African hardwoods. Keywords: Finger-joint Longitudinal vibration. Tropical hardwoods
Description: This is an article published by Ghana Journal of Forestry in 2000.
URI: http://hdl.handle.net/123456789/1286
Appears in Collections:College of Architecture and Planning

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