Alexander Opazo-Vega, Alan Jara-Cisterna, Franco Benedetti, Mario Nuñez-Decap
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引用次数: 0
Abstract
Laminated veneer lumber panels (LVL) are engineered wood products suitable for application in construction contexts. However, LVL panels have some deficient elastic properties (e.g., \({E}_{22}\)) concerning other elastic properties (e.g., \({E}_{11}\) and \({G}_{12}\)), which may cause problems in structural applications. Carbon and basalt fibers (CF and BF) are reinforcement alternatives for LVL panels, as they can be included in the interior or exterior wood veneer bonding process. This work aims to analyze the effect of incorporating CF and BF fibers in the orthotropic elastic properties of radiata pine LVL panels through a nondestructive method based on transverse vibration tests and model updating techniques. Accordingly, 20 LVL panels of 15 mm thickness were fabricated and tested with different reinforcing fibers and adhesives. Then, some relevant panels’ dynamic properties were identified through experimental modal analysis. Finally, three relevant panels’ orthotropic elastic properties were estimated simultaneously using finite-element model updating techniques and Python-based deterministic calibration scripts. The results suggest that the reinforced LVL panels obtained significant increases in their orthotropic elastic properties, in the order of 22%, 333%, and 27% for \({E}_{11}\), \({E}_{22}\), and \({G}_{12}\), respectively. These results show the effectiveness of the type of reinforcement applied and the potential application of the nondestructive evaluation method in other contexts.
层压单板(LVL)是一种适用于建筑环境的工程木制品。然而,LVL面板在其他弹性性能(例如\({E}_{11}\)和\({G}_{12}\))方面有一些弹性性能不足(例如\({E}_{22}\)),这可能会在结构应用中引起问题。碳和玄武岩纤维(CF和BF)是LVL板的加固替代品,因为它们可以包括在内部或外部木饰面粘合过程中。采用基于横向振动试验和模型更新技术的无损检测方法,分析CF和BF纤维对辐射松LVL板正交各向异性弹性性能的影响。据此,制作了20块厚度为15mm的LVL板,并使用不同的增强纤维和粘合剂进行了测试。然后,通过试验模态分析,确定了相关面板的动力特性。最后,利用有限元模型更新技术和基于python的确定性校准脚本,对三个相关面板的正交各向异性弹性性能进行了同步估计。结果表明,加固后的LVL板的正交各向异性弹性性能显著提高,约为22%, 333%, and 27% for \({E}_{11}\), \({E}_{22}\), and \({G}_{12}\), respectively. These results show the effectiveness of the type of reinforcement applied and the potential application of the nondestructive evaluation method in other contexts.
期刊介绍:
Wood Science and Technology publishes original scientific research results and review papers covering the entire field of wood material science, wood components and wood based products. Subjects are wood biology and wood quality, wood physics and physical technologies, wood chemistry and chemical technologies. Latest advances in areas such as cell wall and wood formation; structural and chemical composition of wood and wood composites and their property relations; physical, mechanical and chemical characterization and relevant methodological developments, and microbiological degradation of wood and wood based products are reported. Topics related to wood technology include machining, gluing, and finishing, composite technology, wood modification, wood mechanics, creep and rheology, and the conversion of wood into pulp and biorefinery products.