DOI: 10.36347/sjet.2022.v10i06.002

Pages: 102-110

To investigate the crack development of wood specimens under different water content working conditions, and to explore the effect of water content on the mechanical properties of wood and the crack evolution law, pine wood specimens with 0%, 10%, 20%, 30%, 40% and 50% moisture content is used for this study. The mechanical testing machine and acoustic emission equipment is used to collect the energy signals emitted from the wood under load, and the AE signals (ringing counts, energy) is obtained using acoustic emission (AE) technique, and the acoustic AE signals is profiled using parametric analysis. The crack evolution pattern of the cracked wood specimens with different moisture content is consistent with the results obtained from the acoustic emission test, and the ringing count and energy can accurately reflect the damage of the wood, while the higher the moisture content, the flatter the crack development and the lower the bearing capacity of the specimens. The crack evolution of cracked wood specimens with different moisture content can be accurately predicted by acoustic emission ring counts and energy, and the degree of crack evolution of wood is inversely proportional to the moisture content. The test results provide a reference for further research on the relationship between moisture content and wood effects.