@article{L. Karlinasari_2022, title={NON-DESTRUCTIVE ULTRASONIC TESTING METHOD FOR DETERMINING BENDING STRENGTH PROPERTIES OF GMELINA WOOD (<em>GMELINA</em> <em>ARBOREA</em>)}, volume={20}, url={https://jtfs.frim.gov.my/jtfs/article/view/1100}, abstractNote={&lt;p&gt;Non-destructive ultrasonic testing method for determining bending strength properties of gmelina wood (&lt;em&gt;Gmelina&lt;/em&gt; &lt;em&gt;arborea). &lt;/em&gt;The objective of this study was to investigate the usefulness of non-destructive ultrasonic testing&amp;nbsp; method&amp;nbsp; in&amp;nbsp; evaluating&amp;nbsp; wood strength and stiffness of gmelina (&lt;em&gt;Gmelina arborea) &lt;/em&gt;from several positions in the tree, both vertically and horizontally. These tests were conducted on 72 small&amp;nbsp; clear&amp;nbsp; wood&amp;nbsp; specimens&amp;nbsp; of dimensions&amp;nbsp; 5 x&amp;nbsp; 5&amp;nbsp; x&amp;nbsp; 76 cm. The effects of position of specimen in a tree could be identified with ultrasonic wave velocity (Vus).&amp;nbsp; The dynamic testing determined by ultrasonic method, Vus and dynamic modulus&amp;nbsp; of&amp;nbsp; elasticity&amp;nbsp; (MOEd),&amp;nbsp; were highly correlated with the static bending test (static modulus of elasticity and modulus of&amp;nbsp; rupture). The developed regression models were significant. Ultrasonic method seems&amp;nbsp; applicable in situations where static bending test is not feasible.&lt;/p&gt;}, number={2}, journal={Journal of Tropical Forest Science (JTFS) }, author={L. Karlinasari}, year={2022}, month={Jul.}, pages={99–104} }