벗조인트를 포함한 積層材의 휨 强度性能과 Acoustic Emission 特性

Bending Strength Properties and Acoustic Emission of Laminated Wood Beams Having Butt Joints

The bending strength properties and acoustic emissions of laminated wood having butt joints were investigated. the correlation coefficient between the modulus of elasticity(MOE)and the modulus of rupture(MOR) for all types of laminated wood was smaller than that of solod wood. The AE evevnt count and the generation time were related very closely to the MOR. The relationship between the load and the AE cumulative event count in the early stage can be expressed by the following equation: N=AP² + B, where N is the AE cumulative event count, P is load, and A and B are constants. The correlation coefficient between the logarithm of regression coefficient A and the MOR was much greater than that between the MOE and the MOR. The MOR for laminated wood having butt joints can be estimated using the logarithm of regresson doefficient A.