A study on internal bond strength detection model based on vibration mechanics

• Published in: Wood science and technology Vol. 58; no. 5-6; pp. 1683 - 1695
• Main Authors: Xu, Zhaojun, Wang, Yuxuan, Zhang, Jing, Zhu, Nanfeng, Wang, Xinzhou
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01-11-2024; Springer Nature B.V
• Subjects: Adhesives; Biomedical and Life Sciences; Bond strength; Bonding strength; Ceramics; Composites; Compressive strength; Cracks; Error analysis; Error detection; Fracture mechanics; Glass; Hot pressing; Life Sciences; Longitudinal waves; Machines; Manufacturing; Mechanical properties; Modulus of elasticity; Natural Materials; Original; Piezoelectric ceramics; Processes; Regression models; Stress concentration; Vibration; Vibration measurement; Wood; Wood Science & Technology; Wood sciences
• ISSN: 0043-7719; 1432-5225
• DOI: 10.1007/s00226-024-01570-1

This study proposed a linear model between internal bond strength and compressive elastic modulus based on Griffith’s fracture theory. The local compressive elastic modulus was determined by non-destructively detecting the inherent frequency of material vibration using a method based on rod longitudinal vibration theory. In the experiment, the inherent vibration frequencies of 10 types of medium-density fiberboard (MDF) were measured through excitation and vibration of piezoelectric ceramics based on longitudinal wave vibration theory. Then, the compressive elastic modulus of each board was calculated. The calculated compressive elastic modulus of MDF and the measured internal bond strength values were fitted into a linear regression model. A high linear correlation between them (r
2
 = 0.972) was found, having a mean square error of
. In addition, the average error between the model prediction value and the measured value was 0.014 MPa, having an average relative error of 1.49%. The maximum error was 0.044 MPa with a maximum relative error of 5.06%, indicating that the developed model was highly consistent with reality and had very small deviations. The results indicated that this proposed method can be used to accurately estimate the internal bond strength by non-destructively detecting the compressive elastic modulus of MDF.