ESTIMATION OF MODULUS OF ELASTICITY AND RUPTURE OF Eucalyptus cloeziana F. Muell WOOD THROUGH NON-DESTRUCTIVE METHOD

Abstract

This study was developed aiming at evaluating the use of constant dynamic elastic obtained by non-destructive testing, as a parameter in the estimation of mechanical properties of Eucalyptus cloeziana obtained by destructive test. With equipment emitting ultrasonicwaves from transducers adapted to dry spots of 45 kHz, we determined the ultrasonic velocity relates to distance and time of transmission of the wave along the length of specimens used in test with nominal dimensions of 2.0 x 2.0 x 30.0 cm in thickness, width and length,respectively. To assess the sensitivity of ultrasound, the samples were tested for evidencedestructively in a universal test for determining the modulus of elasticity and rupture in staticbending. The results showed that the ultrasonic method is a fast and efficient tool for inference of non-destructive wood mechanical properties. However, differences in the adjustment of statistical models showed that the best regression parameters were obtained toestimating the modulus of elasticity, compared with the modulus of rupture.

Keywords

• wood quality
• ultrasound waves
• not-destructive testing
• modulus of elasticity
• modulus of rupture.