Assessing the effect of swelling pressures in particleboard and MDF using acoustic emission technology

摘要

The interaction of moisture with wood-based composites leads to the development of swelling pressures that cause the failure of resin bonds and the dislocation of fibers within the composites. These bond failures and dislocations can result in abrupt stress changes that trigger vibrations and create acoustic emissions (AE). Resin and wax levels within the composites effectively limit the interaction of wood and water and affect the level of AE. In this research, acoustic emissions were used to measure the effects of resin and wax levels in both particleboard and medium density fiberboard (MDF).