Mechanical and acoustic characteristics of four wood species subjected to bending load

The mechanical and acoustic properties of four commonly used wood species, including Populus tomentosa (Poplar), Swietenia mahagoni (Mahogany), Fagus orientalis (Beech), Fraxinus excelsior (Ash) were investigated through using three-point bending notched tests synchronizing with power spectrum analysis method fractal dimension theory. results showed that the modulus elasticity rapture changed in same trend order ranging from high to low was ash, beech, poplar, mahogany, successively. brittle fracture occurred mahogany samples ductile raised other three species. Positive proportional correlation observed between maximum pressure regardless seeing species as independent or population samples. failure modes can be identified by amplitude-frequency curve following laws: peak value relatively higher when a single crack developed at latewood; for earlywood, only one curves, corresponding smaller than case two cracks there are peaks those earlywood latewood. vibrational characterized test distinguish