Prediction of the modulus of elasticity of Eucalyptus grandis through two nondestructive techniques

Abstract

The present study aimed to estimate the modulus of elasticity (MOE) at static bending of Rose gum (Eucalyptus grandis) heartwood and sapwood through two nondestructive techniques: ultrasound and stress wave. Sixty samples of heartwood and sapwood were prepared. Nondestructive tests were performed using ultrasound and stress wave timer equipment, while destructive tests were carried out in a universal machine through static bending tests. The main results showed that the heartwood presented better behavior than the sapwood in the nondestructive tests. However, the best model was obtained considering both wood types through the ultrasonic technique. Therefore, stress wave and ultrasonic techniques could be employed to estimate the modulus of elasticity of Rose gum wood. Keywords

Variations on growth characteristics and wood properties of three <i>Eucalyptus</i> species planted for pulpwood in Indonesia

“…The CS, MOE, and MOR estimated by NIR spectroscopy were 40.1 to 63.6 MPa, 11.1 to 20.2 GPa, and 69.9 to 115.8 MPa in seven-year-old E. urophylla grown in Brazil (Andrade et al 2010). Cademartori et al (2014) reported that the MOE of seven-year-old E. grandis obtained through a static bending test was 11.2 to 13.0 GPa from the heartwood to the sapwood. In 15-year-old E. pellita, the mean values of CS, MOE, and MOR were 76.0 MPa, 13.6 GPa, and 108 MPa, respectively, and these properties tended to increase from the inner to the outer heartwood (FWPA 2008).…”

EDGE Glued Panels Grading through Transversal Vibration Testing

“…Nondestructive techniques also enable wood maintenance through mapping of decayed areas without the need to remove parts of the structure [14]. [15] list that the most common methods of nondestructive evaluation applies the technologies of x-ray, ultrasound, eddy-current, vibration analysis, acoustic emission, etc.…”