Experimental Investigations of Wood Damping and Elastic Modulus

Maria CIORNEI

Abstract


The damping capacity and the elastic modulus are the most important parameters to characterize wood’s mechanical properties. This paper deals with a simple experimental technique for determination of the wood damping factor by measuring the amplitude decrement of free vibrations in probes made of ten wood essences. Damped vibrations are captured by aid of a piezoelectric transducer and transferred to a storage oscilloscope. Then, they are uploaded to a computer, which allows data interpretation and transferring the graphs to a text editor. The logarithmic decrement is an indicator of internal damping in wood, and the oscillating frequency allows determining the elastic constant of the probe and thus the longitudinal elastic modulus. Free vibrations, damping factor, logarithmic decrement, elastic modulus.


Keywords


Free vibrations, damping factor, logarithmic decrement, elastic modulus.

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DOCT-US

ISSN: 2065-3247

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