Assessment of the Performance of Nondestructive Test to Determine the Mechanical Properties of Eucalyptus Citriodora and Pinus Eliottii Wood
Raquel Gonçalves, Universidade Estadual de Campinas, Campinas, SP, Brasil
ABSTRACT Usually the mechanics and physical properties of wood are determined using normative destructive tests. Non destructive tests can represent an alternative for mechanical classification of wood by the determination of its resistance and stiffness. In order to use ultrasonic tests to do that it is first necessary to establish a valid correlation between the direct (static) and the dynamic (ultrasonic) tests. To check the existence and validity of this correlation, destructive static bending test in structural pieces, fibber parallel compression test in specimen and dynamic test using ultrasonic were conducted. The specimens were obtained from Eucalyptus citriodora and Pinus ellittii wood. The moduli of elasticity (Ef) were obtained from bending static test. The modulus of elasticity (Ec0) and the resistente (fc0) were obtained from the compression test. The dynamic elasticity moduli (Ed) were obtained from the ultrasonic test. The data was analyzed by mathematical regression in order to obtain a correlation between the test results. The obtained correlations show a statistic significance indicating that the methodology can be used to evaluate structural pieces. This demonstrates a possibility of implementing this technique for wood classification.
Publication Source: NDTISS '99 - International Symposium on NDT Contribution to the Infrastructure Safety Systems, Nov 1999 in Tores Brazil.
Publisher: Center of Tecnology, Federal University of Santa Maria (UFSM) - [Homepage]
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